Merging upstream version 1.14.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

5 files changed, 1387 insertions, 279 deletions

diff --git a/collectors/cgroups.plugin/Makefile.in b/collectors/cgroups.plugin/Makefile.in
new file mode 100644
index 00000000..e274f0d6
--- /dev/null
+++ b/collectors/cgroups.plugin/Makefile.in
@@ -0,0 +1,571 @@
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+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-generic
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-dist_pluginsSCRIPTS
+
+.MAKE: install-am install-strip
+
+.PHONY: all all-am check check-am clean clean-generic cscopelist-am \
+	ctags-am distclean distclean-generic distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dist_pluginsSCRIPTS install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am install-man \
+	install-pdf install-pdf-am install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	maintainer-clean maintainer-clean-generic mostlyclean \
+	mostlyclean-generic pdf pdf-am ps ps-am tags-am uninstall \
+	uninstall-am uninstall-dist_pluginsSCRIPTS
+
+.in:
+	if sed \
+		-e 's#[@]localstatedir_POST@#$(localstatedir)#g' \
+		-e 's#[@]sbindir_POST@#$(sbindir)#g' \
+		-e 's#[@]configdir_POST@#$(configdir)#g' \
+		-e 's#[@]libconfigdir_POST@#$(libconfigdir)#g' \
+		-e 's#[@]cachedir_POST@#$(cachedir)#g' \
+		-e 's#[@]registrydir_POST@#$(registrydir)#g' \
+		-e 's#[@]varlibdir_POST@#$(varlibdir)#g' \
+		$< > $@.tmp; then \
+		mv "$@.tmp" "$@"; \
+	else \
+		rm -f "$@.tmp"; \
+		false; \
+	fi
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/collectors/cgroups.plugin/README.md b/collectors/cgroups.plugin/README.md
index 403ab841..3fffbd17 100644
--- a/collectors/cgroups.plugin/README.md
+++ b/collectors/cgroups.plugin/README.md
@@ -56,6 +56,18 @@ To provide a sane default for this setting, netdata uses the following pattern l
 
 So, we disable checking for **child cgroups** in systemd internal cgroups ([systemd services are monitored by netdata](#monitoring-systemd-services)), user cgroups (normally used for desktop and remote user sessions), qemu virtual machines (child cgroups of virtual machines) and `init.scope`. All others are enabled.
 
+### unified cgroups (cgroups v2) support
+
+Basic unified cgroups metrics are supported. To use them instead of v1 cgroups add:
+
+```
+[plugin:cgroups]
+	use unified cgroups = yes
+	path to unified cgroups = /sys/fs/cgroup
+```
+
+Unified cgroups use same name pattern matching as v1 cgroups. `cgroup_enable_systemd_services_detailed_memory` is currently unsupported when using unified cgroups.
+
 
 ### enabled cgroups
 
diff --git a/collectors/cgroups.plugin/cgroup-name.sh b/collectors/cgroups.plugin/cgroup-name.sh
new file mode 100644
index 00000000..d4deb74c
--- /dev/null
+++ b/collectors/cgroups.plugin/cgroup-name.sh
@@ -0,0 +1,211 @@
+#!/usr/bin/env bash
+#shellcheck disable=SC2001
+
+# netdata
+# real-time performance and health monitoring, done right!
+# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# Script to find a better name for cgroups
+#
+
+export PATH="${PATH}:/sbin:/usr/sbin:/usr/local/sbin"
+export LC_ALL=C
+
+# -----------------------------------------------------------------------------
+
+PROGRAM_NAME="$(basename "${0}")"
+
+logdate() {
+	date "+%Y-%m-%d %H:%M:%S"
+}
+
+log() {
+	local status="${1}"
+	shift
+
+	echo >&2 "$(logdate): ${PROGRAM_NAME}: ${status}: ${*}"
+
+}
+
+warning() {
+	log WARNING "${@}"
+}
+
+error() {
+	log ERROR "${@}"
+}
+
+info() {
+	log INFO "${@}"
+}
+
+fatal() {
+	log FATAL "${@}"
+	exit 1
+}
+
+function docker_get_name_classic() {
+	local id="${1}"
+	info "Running command: docker ps --filter=id=\"${id}\" --format=\"{{.Names}}\""
+	NAME="$(docker ps --filter=id="${id}" --format="{{.Names}}")"
+	return 0
+}
+
+function docker_get_name_api() {
+	local id="${1}"
+	if [ ! -S "${DOCKER_HOST}" ]; then
+		warning "Can't find ${DOCKER_HOST}"
+		return 1
+	fi
+	if ! command -v jq >/dev/null 2>&1; then
+		warning "Can't find jq command line tool. jq is required for netdata to retrieve docker container name using ${DOCKER_HOST} API, falling back to docker ps"
+		return 1
+	fi
+
+	info "Running API command: /containers/${id}/json"
+	JSON=$(echo -e "GET /containers/${id}/json HTTP/1.0\\r\\n" | nc -U "${DOCKER_HOST}" | grep '^{.*')
+	NAME=$(echo "$JSON" | jq -r .Name,.Config.Hostname | grep -v null | head -n1 | sed 's|^/||')
+	return 0
+}
+
+function k8s_get_name() {
+	# Take the last part of the delimited path identifier (expecting either _ or / as a delimiter).
+	local id="${1##*_}"
+	if [ "${id}" == "${1}" ]; then
+		id="${1##*/}"
+	fi
+	KUBE_TOKEN="$(</var/run/secrets/kubernetes.io/serviceaccount/token)"
+	if command -v jq >/dev/null 2>&1; then
+		NAME="$(
+		curl -sSk -H "Authorization: Bearer $KUBE_TOKEN"  "https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_PORT_443_TCP_PORT/api/v1/pods" |
+		jq -r '.items[] | "k8s_\(.metadata.namespace)_\(.metadata.name)_\(.metadata.uid)_\(.status.containerStatuses[0].name) \(.status.containerStatuses[0].containerID)"' |
+		grep "$id" |
+		cut -d' ' -f1
+		)"
+	else
+		warning "jq command not available, k8s_get_name() cannot execute. Please install jq should you wish for k8s to be fully functional"
+	fi
+
+	if [ -z "${NAME}" ]; then
+		warning "cannot find the name of k8s pod with containerID '${id}'. Setting name to ${id} and disabling it"
+		NAME="${id}"
+		NAME_NOT_FOUND=3
+	else
+		info "k8s containerID '${id}' has chart name (namespace_podname_poduid_containername) '${NAME}'"
+	fi
+}
+
+function docker_get_name() {
+	local id="${1}"
+	if hash docker 2>/dev/null; then
+		docker_get_name_classic "${id}"
+	else
+		docker_get_name_api "${id}" || docker_get_name_classic "${id}"
+	fi
+	if [ -z "${NAME}" ]; then
+		warning "cannot find the name of docker container '${id}'"
+		NAME_NOT_FOUND=2
+		NAME="${id:0:12}"
+	else
+		info "docker container '${id}' is named '${NAME}'"
+	fi
+}
+
+function docker_validate_id() {
+	local id="${1}"
+	if [ -n "${id}" ] && { [ ${#id} -eq 64 ] || [ ${#id} -eq 12 ]; }; then
+		docker_get_name "${id}"
+	else
+		error "a docker id cannot be extracted from docker cgroup '${CGROUP}'."
+	fi
+}
+
+
+# -----------------------------------------------------------------------------
+
+[ -z "${NETDATA_USER_CONFIG_DIR}" ] && NETDATA_USER_CONFIG_DIR="/etc/netdata"
+[ -z "${NETDATA_STOCK_CONFIG_DIR}" ] && NETDATA_STOCK_CONFIG_DIR="/usr/lib/netdata/conf.d"
+
+DOCKER_HOST="${DOCKER_HOST:=/var/run/docker.sock}"
+CGROUP="${1}"
+NAME_NOT_FOUND=0
+NAME=
+
+# -----------------------------------------------------------------------------
+
+if [ -z "${CGROUP}" ]; then
+	fatal "called without a cgroup name. Nothing to do."
+fi
+
+for CONFIG in "${NETDATA_USER_CONFIG_DIR}/cgroups-names.conf" "${NETDATA_STOCK_CONFIG_DIR}/cgroups-names.conf"; do
+	if [ -f "${CONFIG}" ]; then
+		NAME="$(grep "^${CGROUP} " "${CONFIG}" | sed 's/[[:space:]]\+/ /g' | cut -d ' ' -f 2)"
+		if [ -z "${NAME}" ]; then
+			info "cannot find cgroup '${CGROUP}' in '${CONFIG}'."
+		else
+			break
+		fi
+	#else
+	#   info "configuration file '${CONFIG}' is not available."
+	fi
+done
+
+if [ -z "${NAME}" ] && [ -n "${KUBERNETES_SERVICE_HOST}" ] && [ -n "${KUBERNETES_PORT_443_TCP_PORT}" ] && [[ ${CGROUP} =~ ^.*kubepods.* ]]; then
+	k8s_get_name "${CGROUP}"
+fi
+
+if [ -z "${NAME}" ]; then
+	if [[ ${CGROUP} =~ ^.*docker[-_/\.][a-fA-F0-9]+[-_\.]?.*$ ]]; then
+		# docker containers
+		#shellcheck disable=SC1117
+		DOCKERID="$(echo "${CGROUP}" | sed "s|^.*docker[-_/]\([a-fA-F0-9]\+\)[-_\.]\?.*$|\1|")"
+		docker_validate_id "${DOCKERID}"
+	elif [[ ${CGROUP} =~ ^.*ecs[-_/\.][a-fA-F0-9]+[-_\.]?.*$ ]]; then
+		# ECS
+		#shellcheck disable=SC1117
+		DOCKERID="$(echo "${CGROUP}" | sed "s|^.*ecs[-_/].*[-_/]\([a-fA-F0-9]\+\)[-_\.]\?.*$|\1|")"
+		docker_validate_id "${DOCKERID}"
+
+	elif [[ ${CGROUP} =~ machine.slice[_/].*\.service ]]; then
+		# systemd-nspawn
+		NAME="$(echo "${CGROUP}" | sed 's/.*machine.slice[_\/]\(.*\)\.service/\1/g')"
+
+	elif [[ ${CGROUP} =~ machine.slice_machine.*-qemu ]]; then
+		# libvirtd / qemu virtual machines
+		# NAME="$(echo ${CGROUP} | sed 's/machine.slice_machine.*-qemu//; s/\/x2d//; s/\/x2d/\-/g; s/\.scope//g')"
+		NAME="qemu_$(echo "${CGROUP}" | sed 's/machine.slice_machine.*-qemu//; s/\/x2d[[:digit:]]*//; s/\/x2d//g; s/\.scope//g')"
+
+	elif [[ ${CGROUP} =~ machine_.*\.libvirt-qemu ]]; then
+		# libvirtd / qemu virtual machines
+		NAME="qemu_$(echo "${CGROUP}" | sed 's/^machine_//; s/\.libvirt-qemu$//; s/-/_/;')"
+
+	elif [[ ${CGROUP} =~ qemu.slice_([0-9]+).scope && -d /etc/pve ]]; then
+		# Proxmox VMs
+
+		FILENAME="/etc/pve/qemu-server/${BASH_REMATCH[1]}.conf"
+		if [[ -f $FILENAME && -r $FILENAME ]]; then
+			NAME="qemu_$(grep -e '^name: ' "/etc/pve/qemu-server/${BASH_REMATCH[1]}.conf" | head -1 | sed -rn 's|\s*name\s*:\s*(.*)?$|\1|p')"
+		else
+			error "proxmox config file missing ${FILENAME} or netdata does not have read access.  Please ensure netdata is a member of www-data group."
+		fi
+	elif [[ ${CGROUP} =~ lxc_([0-9]+) && -d /etc/pve ]]; then
+		# Proxmox Containers (LXC)
+
+		FILENAME="/etc/pve/lxc/${BASH_REMATCH[1]}.conf"
+		if [[ -f ${FILENAME} && -r ${FILENAME} ]]; then
+			NAME=$(grep -e '^hostname: ' "/etc/pve/lxc/${BASH_REMATCH[1]}.conf" | head -1 | sed -rn 's|\s*hostname\s*:\s*(.*)?$|\1|p')
+		else
+			error "proxmox config file missing ${FILENAME} or netdata does not have read access.  Please ensure netdata is a member of www-data group."
+		fi
+	fi
+
+	[ -z "${NAME}" ] && NAME="${CGROUP}"
+	[ ${#NAME} -gt 100 ] && NAME="${NAME:0:100}"
+fi
+
+info "cgroup '${CGROUP}' is called '${NAME}'"
+echo "${NAME}"
+
+exit ${NAME_NOT_FOUND}
+
diff --git a/collectors/cgroups.plugin/cgroup-name.sh.in b/collectors/cgroups.plugin/cgroup-name.sh.in
index 97e03085..48f52388 100755
--- a/collectors/cgroups.plugin/cgroup-name.sh.in
+++ b/collectors/cgroups.plugin/cgroup-name.sh.in
@@ -58,6 +58,11 @@ function docker_get_name_api() {
 		warning "Can't find ${DOCKER_HOST}"
 		return 1
 	fi
+	if ! command -v jq >/dev/null 2>&1; then
+		warning "Can't find jq command line tool. jq is required for netdata to retrieve docker container name using ${DOCKER_HOST} API, falling back to docker ps"
+		return 1
+	fi
+
 	info "Running API command: /containers/${id}/json"
 	JSON=$(echo -e "GET /containers/${id}/json HTTP/1.0\\r\\n" | nc -U "${DOCKER_HOST}" | grep '^{.*')
 	NAME=$(echo "$JSON" | jq -r .Name,.Config.Hostname | grep -v null | head -n1 | sed 's|^/||')
@@ -71,12 +76,17 @@ function k8s_get_name() {
 		id="${1##*/}"
 	fi
 	KUBE_TOKEN="$(</var/run/secrets/kubernetes.io/serviceaccount/token)"
-	NAME="$(
-curl -sSk -H "Authorization: Bearer $KUBE_TOKEN"  "https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_PORT_443_TCP_PORT/api/v1/pods" |
-jq -r '.items[] | "k8s_\(.metadata.namespace)_\(.metadata.name)_\(.metadata.uid)_\(.status.containerStatuses[0].name) \(.status.containerStatuses[0].containerID)"' |
-grep "$id" |
-cut -d' ' -f1
-)"
+	if command -v jq >/dev/null 2>&1; then
+		NAME="$(
+		curl -sSk -H "Authorization: Bearer $KUBE_TOKEN"  "https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_PORT_443_TCP_PORT/api/v1/pods" |
+		jq -r '.items[] | "k8s_\(.metadata.namespace)_\(.metadata.name)_\(.metadata.uid)_\(.status.containerStatuses[0].name) \(.status.containerStatuses[0].containerID)"' |
+		grep "$id" |
+		cut -d' ' -f1
+		)"
+	else
+		warning "jq command not available, k8s_get_name() cannot execute. Please install jq should you wish for k8s to be fully functional"
+	fi
+
 	if [ -z "${NAME}" ]; then
 		warning "cannot find the name of k8s pod with containerID '${id}'. Setting name to ${id} and disabling it"
 		NAME="${id}"
diff --git a/collectors/cgroups.plugin/sys_fs_cgroup.c b/collectors/cgroups.plugin/sys_fs_cgroup.c
index 4af4edad..68d6e94b 100644
--- a/collectors/cgroups.plugin/sys_fs_cgroup.c
+++ b/collectors/cgroups.plugin/sys_fs_cgroup.c
@@ -28,6 +28,9 @@ static int cgroup_enable_systemd_services = CONFIG_BOOLEAN_YES;
 static int cgroup_enable_systemd_services_detailed_memory = CONFIG_BOOLEAN_NO;
 static int cgroup_used_memory_without_cache = CONFIG_BOOLEAN_YES;
 
+static int cgroup_use_unified_cgroups = CONFIG_BOOLEAN_NO;
+static int cgroup_unified_exist = CONFIG_BOOLEAN_AUTO;
+
 static int cgroup_search_in_devices = 1;
 
 static int cgroup_enable_new_cgroups_detected_at_runtime = 1;
@@ -44,6 +47,7 @@ static char *cgroup_cpuset_base = NULL;
 static char *cgroup_blkio_base = NULL;
 static char *cgroup_memory_base = NULL;
 static char *cgroup_devices_base = NULL;
+static char *cgroup_unified_base = NULL;
 
 static int cgroup_root_count = 0;
 static int cgroup_root_max = 1000;
@@ -80,6 +84,8 @@ void read_cgroup_plugin_configuration() {
     if(cgroup_check_for_new_every < cgroup_update_every)
         cgroup_check_for_new_every = cgroup_update_every;
 
+    cgroup_use_unified_cgroups = config_get_boolean_ondemand("plugin:cgroups", "use unified cgroups", cgroup_use_unified_cgroups);
+
     cgroup_containers_chart_priority = (int)config_get_number("plugin:cgroups", "containers priority", cgroup_containers_chart_priority);
     if(cgroup_containers_chart_priority < 1)
         cgroup_containers_chart_priority = NETDATA_CHART_PRIO_CGROUPS_CONTAINERS;
@@ -109,56 +115,90 @@ void read_cgroup_plugin_configuration() {
 
     char filename[FILENAME_MAX + 1], *s;
     struct mountinfo *mi, *root = mountinfo_read(0);
-
-    mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "cpuacct");
-    if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "cpuacct");
-    if(!mi) {
-        error("CGROUP: cannot find cpuacct mountinfo. Assuming default: /sys/fs/cgroup/cpuacct");
-        s = "/sys/fs/cgroup/cpuacct";
-    }
-    else s = mi->mount_point;
-    snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
-    cgroup_cpuacct_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuacct", filename);
-
-    mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "cpuset");
-    if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "cpuset");
-    if(!mi) {
-        error("CGROUP: cannot find cpuset mountinfo. Assuming default: /sys/fs/cgroup/cpuset");
-        s = "/sys/fs/cgroup/cpuset";
-    }
-    else s = mi->mount_point;
-    snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
-    cgroup_cpuset_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuset", filename);
-
-    mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "blkio");
-    if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "blkio");
-    if(!mi) {
-        error("CGROUP: cannot find blkio mountinfo. Assuming default: /sys/fs/cgroup/blkio");
-        s = "/sys/fs/cgroup/blkio";
-    }
-    else s = mi->mount_point;
-    snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
-    cgroup_blkio_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/blkio", filename);
-
-    mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "memory");
-    if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "memory");
-    if(!mi) {
-        error("CGROUP: cannot find memory mountinfo. Assuming default: /sys/fs/cgroup/memory");
-        s = "/sys/fs/cgroup/memory";
+    if(!cgroup_use_unified_cgroups) {
+        mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "cpuacct");
+        if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "cpuacct");
+        if(!mi) {
+            error("CGROUP: cannot find cpuacct mountinfo. Assuming default: /sys/fs/cgroup/cpuacct");
+            s = "/sys/fs/cgroup/cpuacct";
+        }
+        else s = mi->mount_point;
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
+        cgroup_cpuacct_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuacct", filename);
+
+        mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "cpuset");
+        if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "cpuset");
+        if(!mi) {
+            error("CGROUP: cannot find cpuset mountinfo. Assuming default: /sys/fs/cgroup/cpuset");
+            s = "/sys/fs/cgroup/cpuset";
+        }
+        else s = mi->mount_point;
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
+        cgroup_cpuset_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuset", filename);
+
+        mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "blkio");
+        if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "blkio");
+        if(!mi) {
+            error("CGROUP: cannot find blkio mountinfo. Assuming default: /sys/fs/cgroup/blkio");
+            s = "/sys/fs/cgroup/blkio";
+        }
+        else s = mi->mount_point;
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
+        cgroup_blkio_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/blkio", filename);
+
+        mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "memory");
+        if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "memory");
+        if(!mi) {
+            error("CGROUP: cannot find memory mountinfo. Assuming default: /sys/fs/cgroup/memory");
+            s = "/sys/fs/cgroup/memory";
+        }
+        else s = mi->mount_point;
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
+        cgroup_memory_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/memory", filename);
+
+        mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "devices");
+        if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "devices");
+        if(!mi) {
+            error("CGROUP: cannot find devices mountinfo. Assuming default: /sys/fs/cgroup/devices");
+            s = "/sys/fs/cgroup/devices";
+        }
+        else s = mi->mount_point;
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
+        cgroup_devices_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/devices", filename);
     }
-    else s = mi->mount_point;
-    snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
-    cgroup_memory_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/memory", filename);
-
-    mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "devices");
-    if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "devices");
-    if(!mi) {
-        error("CGROUP: cannot find devices mountinfo. Assuming default: /sys/fs/cgroup/devices");
-        s = "/sys/fs/cgroup/devices";
+    else {
+        //cgroup_enable_cpuacct_stat =
+        cgroup_enable_cpuacct_usage =
+        //cgroup_enable_memory =
+        //cgroup_enable_detailed_memory =
+        cgroup_enable_memory_failcnt =
+        //cgroup_enable_swap =
+        //cgroup_enable_blkio_io =
+        //cgroup_enable_blkio_ops =
+        cgroup_enable_blkio_throttle_io =
+        cgroup_enable_blkio_throttle_ops =
+        cgroup_enable_blkio_merged_ops =
+        cgroup_enable_blkio_queued_ops = CONFIG_BOOLEAN_NO;
+        cgroup_search_in_devices = 0;
+        cgroup_enable_systemd_services_detailed_memory = CONFIG_BOOLEAN_NO;
+        cgroup_used_memory_without_cache = CONFIG_BOOLEAN_NO; //unified cgroups use different values
+
+        //TODO: can there be more than 1 cgroup2 mount point?
+        mi = mountinfo_find_by_filesystem_super_option(root, "cgroup2", "rw"); //there is no cgroup2 specific super option - for now use 'rw' option
+        if(mi) debug(D_CGROUP, "found unified cgroup root using super options, with path: '%s'", mi->mount_point);
+        if(!mi) {
+            mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup2", "cgroup");
+            if(mi) debug(D_CGROUP, "found unified cgroup root using mountsource info, with path: '%s'", mi->mount_point);
+        }
+        if(!mi) {
+            error("CGROUP: cannot find cgroup2 mountinfo. Assuming default: /sys/fs/cgroup");
+            s = "/sys/fs/cgroup";
+        }
+        else s = mi->mount_point;
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
+        cgroup_unified_base = config_get("plugin:cgroups", "path to unified cgroups", filename);
+        debug(D_CGROUP, "using cgroup root: '%s'", cgroup_unified_base);
     }
-    else s = mi->mount_point;
-    snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
-    cgroup_devices_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/devices", filename);
 
     cgroup_root_max = (int)config_get_number("plugin:cgroups", "max cgroups to allow", cgroup_root_max);
     cgroup_max_depth = (int)config_get_number("plugin:cgroups", "max cgroups depth to monitor", cgroup_max_depth);
@@ -321,6 +361,17 @@ struct memory {
     unsigned long long unevictable;
     unsigned long long hierarchical_memory_limit;
 */
+    //unified cgroups metrics
+    unsigned long long anon;
+    unsigned long long kernel_stack;
+    unsigned long long slab;
+    unsigned long long sock;
+    unsigned long long shmem;
+    unsigned long long anon_thp;
+    //unsigned long long file_writeback;
+    //unsigned long long file_dirty;
+    //unsigned long long file;
+
     unsigned long long total_cache;
     unsigned long long total_rss;
     unsigned long long total_rss_huge;
@@ -376,6 +427,7 @@ struct cgroup_network_interface {
 
 #define CGROUP_OPTIONS_DISABLED_DUPLICATE   0x00000001
 #define CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE 0x00000002
+#define CGROUP_OPTIONS_IS_UNIFIED           0x00000004
 
 struct cgroup {
     uint32_t options;
@@ -528,6 +580,42 @@ static inline void cgroup_read_cpuacct_stat(struct cpuacct_stat *cp) {
     }
 }
 
+static inline void cgroup2_read_cpuacct_stat(struct cpuacct_stat *cp) {
+    static procfile *ff = NULL;
+
+    if(likely(cp->filename)) {
+        ff = procfile_reopen(ff, cp->filename, NULL, PROCFILE_FLAG_DEFAULT);
+        if(unlikely(!ff)) {
+            cp->updated = 0;
+            cgroups_check = 1;
+            return;
+        }
+
+        ff = procfile_readall(ff);
+        if(unlikely(!ff)) {
+            cp->updated = 0;
+            cgroups_check = 1;
+            return;
+        }
+
+        unsigned long lines = procfile_lines(ff);
+
+        if(unlikely(lines < 3)) {
+            error("CGROUP: file '%s' should have 3+ lines.", cp->filename);
+            cp->updated = 0;
+            return;
+        }
+
+        cp->user = str2ull(procfile_lineword(ff, 1, 1));
+        cp->system = str2ull(procfile_lineword(ff, 2, 1));
+
+        cp->updated = 1;
+
+        if(unlikely(cp->enabled == CONFIG_BOOLEAN_AUTO && (cp->user || cp->system)))
+            cp->enabled = CONFIG_BOOLEAN_YES;
+    }
+}
+
 static inline void cgroup_read_cpuacct_usage(struct cpuacct_usage *ca) {
     static procfile *ff = NULL;
 
@@ -657,7 +745,57 @@ static inline void cgroup_read_blkio(struct blkio *io) {
     }
 }
 
-static inline void cgroup_read_memory(struct memory *mem) {
+static inline void cgroup2_read_blkio(struct blkio *io, unsigned int word_offset) {
+    if(unlikely(io->enabled == CONFIG_BOOLEAN_AUTO && io->delay_counter > 0)) {
+            io->delay_counter--;
+            return;
+        }
+
+        if(likely(io->filename)) {
+            static procfile *ff = NULL;
+
+            ff = procfile_reopen(ff, io->filename, NULL, PROCFILE_FLAG_DEFAULT);
+            if(unlikely(!ff)) {
+                io->updated = 0;
+                cgroups_check = 1;
+                return;
+            }
+
+            ff = procfile_readall(ff);
+            if(unlikely(!ff)) {
+                io->updated = 0;
+                cgroups_check = 1;
+                return;
+            }
+
+            unsigned long i, lines = procfile_lines(ff);
+
+            if (unlikely(lines < 1)) {
+                error("CGROUP: file '%s' should have 1+ lines.", io->filename);
+                io->updated = 0;
+                return;
+            }
+
+            io->Read = 0;
+            io->Write = 0;
+
+            for (i = 0; i < lines; i++) {
+                io->Read += str2ull(procfile_lineword(ff, i, 2 + word_offset));
+                io->Write += str2ull(procfile_lineword(ff, i, 4 + word_offset));
+            }
+
+            io->updated = 1;
+
+            if(unlikely(io->enabled == CONFIG_BOOLEAN_AUTO)) {
+                if(unlikely(io->Read || io->Write))
+                    io->enabled = CONFIG_BOOLEAN_YES;
+                else
+                    io->delay_counter = cgroup_recheck_zero_blkio_every_iterations;
+            }
+        }
+}
+
+static inline void cgroup_read_memory(struct memory *mem, char parent_cg_is_unified) {
     static procfile *ff = NULL;
 
     // read detailed ram usage
@@ -689,20 +827,36 @@ static inline void cgroup_read_memory(struct memory *mem) {
             goto memory_next;
         }
 
-        if(unlikely(!mem->arl_base)) {
-            mem->arl_base = arl_create("cgroup/memory", NULL, 60);
 
-            arl_expect(mem->arl_base, "total_cache", &mem->total_cache);
-            arl_expect(mem->arl_base, "total_rss", &mem->total_rss);
-            arl_expect(mem->arl_base, "total_rss_huge", &mem->total_rss_huge);
-            arl_expect(mem->arl_base, "total_mapped_file", &mem->total_mapped_file);
-            arl_expect(mem->arl_base, "total_writeback", &mem->total_writeback);
-            mem->arl_dirty = arl_expect(mem->arl_base, "total_dirty", &mem->total_dirty);
-            mem->arl_swap  = arl_expect(mem->arl_base, "total_swap", &mem->total_swap);
-            arl_expect(mem->arl_base, "total_pgpgin", &mem->total_pgpgin);
-            arl_expect(mem->arl_base, "total_pgpgout", &mem->total_pgpgout);
-            arl_expect(mem->arl_base, "total_pgfault", &mem->total_pgfault);
-            arl_expect(mem->arl_base, "total_pgmajfault", &mem->total_pgmajfault);
+        if(unlikely(!mem->arl_base)) {
+            if(parent_cg_is_unified == 0){
+                mem->arl_base = arl_create("cgroup/memory", NULL, 60);
+
+                arl_expect(mem->arl_base, "total_cache", &mem->total_cache);
+                arl_expect(mem->arl_base, "total_rss", &mem->total_rss);
+                arl_expect(mem->arl_base, "total_rss_huge", &mem->total_rss_huge);
+                arl_expect(mem->arl_base, "total_mapped_file", &mem->total_mapped_file);
+                arl_expect(mem->arl_base, "total_writeback", &mem->total_writeback);
+                mem->arl_dirty = arl_expect(mem->arl_base, "total_dirty", &mem->total_dirty);
+                mem->arl_swap  = arl_expect(mem->arl_base, "total_swap", &mem->total_swap);
+                arl_expect(mem->arl_base, "total_pgpgin", &mem->total_pgpgin);
+                arl_expect(mem->arl_base, "total_pgpgout", &mem->total_pgpgout);
+                arl_expect(mem->arl_base, "total_pgfault", &mem->total_pgfault);
+                arl_expect(mem->arl_base, "total_pgmajfault", &mem->total_pgmajfault);
+            } else {
+                mem->arl_base = arl_create("cgroup/memory", NULL, 60);
+
+                arl_expect(mem->arl_base, "anon", &mem->anon);
+                arl_expect(mem->arl_base, "kernel_stack", &mem->kernel_stack);
+                arl_expect(mem->arl_base, "slab", &mem->slab);
+                arl_expect(mem->arl_base, "sock", &mem->sock);
+                arl_expect(mem->arl_base, "anon_thp", &mem->anon_thp);
+                arl_expect(mem->arl_base, "file", &mem->total_mapped_file);
+                arl_expect(mem->arl_base, "file_writeback", &mem->total_writeback);
+                mem->arl_dirty = arl_expect(mem->arl_base, "file_dirty", &mem->total_dirty);
+                arl_expect(mem->arl_base, "pgfault", &mem->total_pgfault);
+                arl_expect(mem->arl_base, "pgmajfault", &mem->total_pgmajfault);
+            }
         }
 
         arl_begin(mem->arl_base);
@@ -716,7 +870,7 @@ static inline void cgroup_read_memory(struct memory *mem) {
         if(unlikely(mem->arl_dirty->flags & ARL_ENTRY_FLAG_FOUND))
             mem->detailed_has_dirty = 1;
 
-        if(unlikely(mem->arl_swap->flags & ARL_ENTRY_FLAG_FOUND))
+        if(unlikely(parent_cg_is_unified == 0 && mem->arl_swap->flags & ARL_ENTRY_FLAG_FOUND))
             mem->detailed_has_swap = 1;
 
         // fprintf(stderr, "READ: '%s', cache: %llu, rss: %llu, rss_huge: %llu, mapped_file: %llu, writeback: %llu, dirty: %llu, swap: %llu, pgpgin: %llu, pgpgout: %llu, pgfault: %llu, pgmajfault: %llu, inactive_anon: %llu, active_anon: %llu, inactive_file: %llu, active_file: %llu, unevictable: %llu, hierarchical_memory_limit: %llu, total_cache: %llu, total_rss: %llu, total_rss_huge: %llu, total_mapped_file: %llu, total_writeback: %llu, total_dirty: %llu, total_swap: %llu, total_pgpgin: %llu, total_pgpgout: %llu, total_pgfault: %llu, total_pgmajfault: %llu, total_inactive_anon: %llu, total_active_anon: %llu, total_inactive_file: %llu, total_active_file: %llu, total_unevictable: %llu\n", mem->filename, mem->cache, mem->rss, mem->rss_huge, mem->mapped_file, mem->writeback, mem->dirty, mem->swap, mem->pgpgin, mem->pgpgout, mem->pgfault, mem->pgmajfault, mem->inactive_anon, mem->active_anon, mem->inactive_file, mem->active_file, mem->unevictable, mem->hierarchical_memory_limit, mem->total_cache, mem->total_rss, mem->total_rss_huge, mem->total_mapped_file, mem->total_writeback, mem->total_dirty, mem->total_swap, mem->total_pgpgin, mem->total_pgpgout, mem->total_pgfault, mem->total_pgmajfault, mem->total_inactive_anon, mem->total_active_anon, mem->total_inactive_file, mem->total_active_file, mem->total_unevictable);
@@ -724,8 +878,10 @@ static inline void cgroup_read_memory(struct memory *mem) {
         mem->updated_detailed = 1;
 
         if(unlikely(mem->enabled_detailed == CONFIG_BOOLEAN_AUTO)) {
-            if(mem->total_cache || mem->total_dirty || mem->total_rss || mem->total_rss_huge || mem->total_mapped_file || mem->total_writeback
-               || mem->total_swap || mem->total_pgpgin || mem->total_pgpgout || mem->total_pgfault || mem->total_pgmajfault)
+            if(( (!parent_cg_is_unified) && ( mem->total_cache || mem->total_dirty || mem->total_rss || mem->total_rss_huge || mem->total_mapped_file || mem->total_writeback
+                    || mem->total_swap || mem->total_pgpgin || mem->total_pgpgout || mem->total_pgfault || mem->total_pgmajfault))
+               || (parent_cg_is_unified && ( mem->anon || mem->total_dirty || mem->kernel_stack || mem->slab || mem->sock || mem->total_writeback
+                    || mem->anon_thp || mem->total_pgfault || mem->total_pgmajfault)))
                 mem->enabled_detailed = CONFIG_BOOLEAN_YES;
             else
                 mem->delay_counter_detailed = cgroup_recheck_zero_mem_detailed_every_iterations;
@@ -768,16 +924,24 @@ memory_next:
 
 static inline void cgroup_read(struct cgroup *cg) {
     debug(D_CGROUP, "reading metrics for cgroups '%s'", cg->id);
-
-    cgroup_read_cpuacct_stat(&cg->cpuacct_stat);
-    cgroup_read_cpuacct_usage(&cg->cpuacct_usage);
-    cgroup_read_memory(&cg->memory);
-    cgroup_read_blkio(&cg->io_service_bytes);
-    cgroup_read_blkio(&cg->io_serviced);
-    cgroup_read_blkio(&cg->throttle_io_service_bytes);
-    cgroup_read_blkio(&cg->throttle_io_serviced);
-    cgroup_read_blkio(&cg->io_merged);
-    cgroup_read_blkio(&cg->io_queued);
+    if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) {
+        cgroup_read_cpuacct_stat(&cg->cpuacct_stat);
+        cgroup_read_cpuacct_usage(&cg->cpuacct_usage);
+        cgroup_read_memory(&cg->memory, 0);
+        cgroup_read_blkio(&cg->io_service_bytes);
+        cgroup_read_blkio(&cg->io_serviced);
+        cgroup_read_blkio(&cg->throttle_io_service_bytes);
+        cgroup_read_blkio(&cg->throttle_io_serviced);
+        cgroup_read_blkio(&cg->io_merged);
+        cgroup_read_blkio(&cg->io_queued);
+    }
+    else {
+        //TODO: io_service_bytes and io_serviced use same file merge into 1 function
+        cgroup2_read_blkio(&cg->io_service_bytes, 0);
+        cgroup2_read_blkio(&cg->io_serviced, 4);
+        cgroup2_read_cpuacct_stat(&cg->cpuacct_stat);
+        cgroup_read_memory(&cg->memory, 1);
+    }
 }
 
 static inline void read_all_cgroups(struct cgroup *root) {
@@ -800,7 +964,12 @@ static inline void read_cgroup_network_interfaces(struct cgroup *cg) {
     pid_t cgroup_pid;
     char command[CGROUP_NETWORK_INTERFACE_MAX_LINE + 1];
 
-    snprintfz(command, CGROUP_NETWORK_INTERFACE_MAX_LINE, "exec %s --cgroup '%s%s'", cgroups_network_interface_script, cgroup_cpuacct_base, cg->id);
+    if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) {
+        snprintfz(command, CGROUP_NETWORK_INTERFACE_MAX_LINE, "exec %s --cgroup '%s%s'", cgroups_network_interface_script, cgroup_cpuacct_base, cg->id);
+    }
+    else {
+        snprintfz(command, CGROUP_NETWORK_INTERFACE_MAX_LINE, "exec %s --cgroup '%s%s'", cgroups_network_interface_script, cgroup_unified_base, cg->id);
+    }
 
     debug(D_CGROUP, "executing command '%s' for cgroup '%s'", command, cg->id);
     FILE *fp = mypopen(command, &cgroup_pid);
@@ -955,6 +1124,8 @@ static inline struct cgroup *cgroup_add(const char *id) {
     cg->chart_id = cgroup_chart_id_strdupz(id);
     cg->hash_chart = simple_hash(cg->chart_id);
 
+    if(cgroup_use_unified_cgroups) cg->options |= CGROUP_OPTIONS_IS_UNIFIED;
+
     if(!cgroup_root)
         cgroup_root = cg;
     else {
@@ -1295,41 +1466,48 @@ static inline void find_all_cgroups() {
     debug(D_CGROUP, "searching for cgroups");
 
     mark_all_cgroups_as_not_available();
+    if(!cgroup_use_unified_cgroups) {
+        if(cgroup_enable_cpuacct_stat || cgroup_enable_cpuacct_usage) {
+            if(find_dir_in_subdirs(cgroup_cpuacct_base, NULL, found_subdir_in_dir) == -1) {
+                cgroup_enable_cpuacct_stat =
+                cgroup_enable_cpuacct_usage = CONFIG_BOOLEAN_NO;
+                error("CGROUP: disabled cpu statistics.");
+            }
+        }
 
-    if(cgroup_enable_cpuacct_stat || cgroup_enable_cpuacct_usage) {
-        if(find_dir_in_subdirs(cgroup_cpuacct_base, NULL, found_subdir_in_dir) == -1) {
-            cgroup_enable_cpuacct_stat =
-            cgroup_enable_cpuacct_usage = CONFIG_BOOLEAN_NO;
-            error("CGROUP: disabled cpu statistics.");
+        if(cgroup_enable_blkio_io || cgroup_enable_blkio_ops || cgroup_enable_blkio_throttle_io || cgroup_enable_blkio_throttle_ops || cgroup_enable_blkio_merged_ops || cgroup_enable_blkio_queued_ops) {
+            if(find_dir_in_subdirs(cgroup_blkio_base, NULL, found_subdir_in_dir) == -1) {
+                cgroup_enable_blkio_io =
+                cgroup_enable_blkio_ops =
+                cgroup_enable_blkio_throttle_io =
+                cgroup_enable_blkio_throttle_ops =
+                cgroup_enable_blkio_merged_ops =
+                cgroup_enable_blkio_queued_ops = CONFIG_BOOLEAN_NO;
+                error("CGROUP: disabled blkio statistics.");
+            }
         }
-    }
 
-    if(cgroup_enable_blkio_io || cgroup_enable_blkio_ops || cgroup_enable_blkio_throttle_io || cgroup_enable_blkio_throttle_ops || cgroup_enable_blkio_merged_ops || cgroup_enable_blkio_queued_ops) {
-        if(find_dir_in_subdirs(cgroup_blkio_base, NULL, found_subdir_in_dir) == -1) {
-            cgroup_enable_blkio_io =
-            cgroup_enable_blkio_ops =
-            cgroup_enable_blkio_throttle_io =
-            cgroup_enable_blkio_throttle_ops =
-            cgroup_enable_blkio_merged_ops =
-            cgroup_enable_blkio_queued_ops = CONFIG_BOOLEAN_NO;
-            error("CGROUP: disabled blkio statistics.");
+        if(cgroup_enable_memory || cgroup_enable_detailed_memory || cgroup_enable_swap || cgroup_enable_memory_failcnt) {
+            if(find_dir_in_subdirs(cgroup_memory_base, NULL, found_subdir_in_dir) == -1) {
+                cgroup_enable_memory =
+                cgroup_enable_detailed_memory =
+                cgroup_enable_swap =
+                cgroup_enable_memory_failcnt = CONFIG_BOOLEAN_NO;
+                error("CGROUP: disabled memory statistics.");
+            }
         }
-    }
 
-    if(cgroup_enable_memory || cgroup_enable_detailed_memory || cgroup_enable_swap || cgroup_enable_memory_failcnt) {
-        if(find_dir_in_subdirs(cgroup_memory_base, NULL, found_subdir_in_dir) == -1) {
-            cgroup_enable_memory =
-            cgroup_enable_detailed_memory =
-            cgroup_enable_swap =
-            cgroup_enable_memory_failcnt = CONFIG_BOOLEAN_NO;
-            error("CGROUP: disabled memory statistics.");
+        if(cgroup_search_in_devices) {
+            if(find_dir_in_subdirs(cgroup_devices_base, NULL, found_subdir_in_dir) == -1) {
+                cgroup_search_in_devices = 0;
+                error("CGROUP: disabled devices statistics.");
+            }
         }
     }
-
-    if(cgroup_search_in_devices) {
-        if(find_dir_in_subdirs(cgroup_devices_base, NULL, found_subdir_in_dir) == -1) {
-            cgroup_search_in_devices = 0;
-            error("CGROUP: disabled devices statistics.");
+    else {
+        if (find_dir_in_subdirs(cgroup_unified_base, NULL, found_subdir_in_dir) == -1) {
+            cgroup_unified_exist = CONFIG_BOOLEAN_NO;
+            error("CGROUP: disabled unified cgroups statistics.");
         }
     }
 
@@ -1352,146 +1530,217 @@ static inline void find_all_cgroups() {
         // check for newly added cgroups
         // and update the filenames they read
         char filename[FILENAME_MAX + 1];
-        if(unlikely(cgroup_enable_cpuacct_stat && !cg->cpuacct_stat.filename)) {
-            snprintfz(filename, FILENAME_MAX, "%s%s/cpuacct.stat", cgroup_cpuacct_base, cg->id);
-            if(likely(stat(filename, &buf) != -1)) {
-                cg->cpuacct_stat.filename = strdupz(filename);
-                cg->cpuacct_stat.enabled = cgroup_enable_cpuacct_stat;
-                snprintfz(filename, FILENAME_MAX, "%s%s/cpuset.cpus", cgroup_cpuset_base, cg->id);
-                cg->filename_cpuset_cpus = strdupz(filename);
-                snprintfz(filename, FILENAME_MAX, "%s%s/cpu.cfs_period_us", cgroup_cpuacct_base, cg->id);
-                cg->filename_cpu_cfs_period = strdupz(filename);
-                snprintfz(filename, FILENAME_MAX, "%s%s/cpu.cfs_quota_us", cgroup_cpuacct_base, cg->id);
-                cg->filename_cpu_cfs_quota = strdupz(filename);
-                debug(D_CGROUP, "cpuacct.stat filename for cgroup '%s': '%s'", cg->id, cg->cpuacct_stat.filename);
+        if(!cgroup_use_unified_cgroups) {
+            if(unlikely(cgroup_enable_cpuacct_stat && !cg->cpuacct_stat.filename)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/cpuacct.stat", cgroup_cpuacct_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->cpuacct_stat.filename = strdupz(filename);
+                    cg->cpuacct_stat.enabled = cgroup_enable_cpuacct_stat;
+                    snprintfz(filename, FILENAME_MAX, "%s%s/cpuset.cpus", cgroup_cpuset_base, cg->id);
+                    cg->filename_cpuset_cpus = strdupz(filename);
+                    snprintfz(filename, FILENAME_MAX, "%s%s/cpu.cfs_period_us", cgroup_cpuacct_base, cg->id);
+                    cg->filename_cpu_cfs_period = strdupz(filename);
+                    snprintfz(filename, FILENAME_MAX, "%s%s/cpu.cfs_quota_us", cgroup_cpuacct_base, cg->id);
+                    cg->filename_cpu_cfs_quota = strdupz(filename);
+                    debug(D_CGROUP, "cpuacct.stat filename for cgroup '%s': '%s'", cg->id, cg->cpuacct_stat.filename);
+                }
+                else
+                    debug(D_CGROUP, "cpuacct.stat file for cgroup '%s': '%s' does not exist.", cg->id, filename);
             }
-            else
-                debug(D_CGROUP, "cpuacct.stat file for cgroup '%s': '%s' does not exist.", cg->id, filename);
-        }
 
-        if(unlikely(cgroup_enable_cpuacct_usage && !cg->cpuacct_usage.filename && !(cg->options & CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE))) {
-            snprintfz(filename, FILENAME_MAX, "%s%s/cpuacct.usage_percpu", cgroup_cpuacct_base, cg->id);
-            if(likely(stat(filename, &buf) != -1)) {
-                cg->cpuacct_usage.filename = strdupz(filename);
-                cg->cpuacct_usage.enabled = cgroup_enable_cpuacct_usage;
-                debug(D_CGROUP, "cpuacct.usage_percpu filename for cgroup '%s': '%s'", cg->id, cg->cpuacct_usage.filename);
+            if(unlikely(cgroup_enable_cpuacct_usage && !cg->cpuacct_usage.filename && !(cg->options & CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE))) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/cpuacct.usage_percpu", cgroup_cpuacct_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->cpuacct_usage.filename = strdupz(filename);
+                    cg->cpuacct_usage.enabled = cgroup_enable_cpuacct_usage;
+                    debug(D_CGROUP, "cpuacct.usage_percpu filename for cgroup '%s': '%s'", cg->id, cg->cpuacct_usage.filename);
+                }
+                else
+                    debug(D_CGROUP, "cpuacct.usage_percpu file for cgroup '%s': '%s' does not exist.", cg->id, filename);
             }
-            else
-                debug(D_CGROUP, "cpuacct.usage_percpu file for cgroup '%s': '%s' does not exist.", cg->id, filename);
-        }
 
-        if(unlikely((cgroup_enable_detailed_memory || cgroup_used_memory_without_cache) && !cg->memory.filename_detailed && (cgroup_used_memory_without_cache || cgroup_enable_systemd_services_detailed_memory || !(cg->options & CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE)))) {
-            snprintfz(filename, FILENAME_MAX, "%s%s/memory.stat", cgroup_memory_base, cg->id);
-            if(likely(stat(filename, &buf) != -1)) {
-                cg->memory.filename_detailed = strdupz(filename);
-                cg->memory.enabled_detailed = (cgroup_enable_detailed_memory == CONFIG_BOOLEAN_YES)?CONFIG_BOOLEAN_YES:CONFIG_BOOLEAN_AUTO;
-                debug(D_CGROUP, "memory.stat filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_detailed);
+            if(unlikely((cgroup_enable_detailed_memory || cgroup_used_memory_without_cache) && !cg->memory.filename_detailed && (cgroup_used_memory_without_cache || cgroup_enable_systemd_services_detailed_memory || !(cg->options & CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE)))) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/memory.stat", cgroup_memory_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->memory.filename_detailed = strdupz(filename);
+                    cg->memory.enabled_detailed = (cgroup_enable_detailed_memory == CONFIG_BOOLEAN_YES)?CONFIG_BOOLEAN_YES:CONFIG_BOOLEAN_AUTO;
+                    debug(D_CGROUP, "memory.stat filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_detailed);
+                }
+                else
+                    debug(D_CGROUP, "memory.stat file for cgroup '%s': '%s' does not exist.", cg->id, filename);
             }
-            else
-                debug(D_CGROUP, "memory.stat file for cgroup '%s': '%s' does not exist.", cg->id, filename);
-        }
 
-        if(unlikely(cgroup_enable_memory && !cg->memory.filename_usage_in_bytes)) {
-            snprintfz(filename, FILENAME_MAX, "%s%s/memory.usage_in_bytes", cgroup_memory_base, cg->id);
-            if(likely(stat(filename, &buf) != -1)) {
-                cg->memory.filename_usage_in_bytes = strdupz(filename);
-                cg->memory.enabled_usage_in_bytes = cgroup_enable_memory;
-                debug(D_CGROUP, "memory.usage_in_bytes filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_usage_in_bytes);
-                snprintfz(filename, FILENAME_MAX, "%s%s/memory.limit_in_bytes", cgroup_memory_base, cg->id);
-                cg->filename_memory_limit = strdupz(filename);
+            if(unlikely(cgroup_enable_memory && !cg->memory.filename_usage_in_bytes)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/memory.usage_in_bytes", cgroup_memory_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->memory.filename_usage_in_bytes = strdupz(filename);
+                    cg->memory.enabled_usage_in_bytes = cgroup_enable_memory;
+                    debug(D_CGROUP, "memory.usage_in_bytes filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_usage_in_bytes);
+                    snprintfz(filename, FILENAME_MAX, "%s%s/memory.limit_in_bytes", cgroup_memory_base, cg->id);
+                    cg->filename_memory_limit = strdupz(filename);
+                }
+                else
+                    debug(D_CGROUP, "memory.usage_in_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
             }
-            else
-                debug(D_CGROUP, "memory.usage_in_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
-        }
 
-        if(unlikely(cgroup_enable_swap && !cg->memory.filename_msw_usage_in_bytes)) {
-            snprintfz(filename, FILENAME_MAX, "%s%s/memory.memsw.usage_in_bytes", cgroup_memory_base, cg->id);
-            if(likely(stat(filename, &buf) != -1)) {
-                cg->memory.filename_msw_usage_in_bytes = strdupz(filename);
-                cg->memory.enabled_msw_usage_in_bytes = cgroup_enable_swap;
-                snprintfz(filename, FILENAME_MAX, "%s%s/memory.memsw.limit_in_bytes", cgroup_memory_base, cg->id);
-                cg->filename_memoryswap_limit = strdupz(filename);
-                debug(D_CGROUP, "memory.msw_usage_in_bytes filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_msw_usage_in_bytes);
+            if(unlikely(cgroup_enable_swap && !cg->memory.filename_msw_usage_in_bytes)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/memory.memsw.usage_in_bytes", cgroup_memory_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->memory.filename_msw_usage_in_bytes = strdupz(filename);
+                    cg->memory.enabled_msw_usage_in_bytes = cgroup_enable_swap;
+                    snprintfz(filename, FILENAME_MAX, "%s%s/memory.memsw.limit_in_bytes", cgroup_memory_base, cg->id);
+                    cg->filename_memoryswap_limit = strdupz(filename);
+                    debug(D_CGROUP, "memory.msw_usage_in_bytes filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_msw_usage_in_bytes);
+                }
+                else
+                    debug(D_CGROUP, "memory.msw_usage_in_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
             }
-            else
-                debug(D_CGROUP, "memory.msw_usage_in_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
-        }
 
-        if(unlikely(cgroup_enable_memory_failcnt && !cg->memory.filename_failcnt)) {
-            snprintfz(filename, FILENAME_MAX, "%s%s/memory.failcnt", cgroup_memory_base, cg->id);
-            if(likely(stat(filename, &buf) != -1)) {
-                cg->memory.filename_failcnt = strdupz(filename);
-                cg->memory.enabled_failcnt = cgroup_enable_memory_failcnt;
-                debug(D_CGROUP, "memory.failcnt filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_failcnt);
+            if(unlikely(cgroup_enable_memory_failcnt && !cg->memory.filename_failcnt)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/memory.failcnt", cgroup_memory_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->memory.filename_failcnt = strdupz(filename);
+                    cg->memory.enabled_failcnt = cgroup_enable_memory_failcnt;
+                    debug(D_CGROUP, "memory.failcnt filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_failcnt);
+                }
+                else
+                    debug(D_CGROUP, "memory.failcnt file for cgroup '%s': '%s' does not exist.", cg->id, filename);
             }
-            else
-                debug(D_CGROUP, "memory.failcnt file for cgroup '%s': '%s' does not exist.", cg->id, filename);
-        }
 
-        if(unlikely(cgroup_enable_blkio_io && !cg->io_service_bytes.filename)) {
-            snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_service_bytes", cgroup_blkio_base, cg->id);
-            if(likely(stat(filename, &buf) != -1)) {
-                cg->io_service_bytes.filename = strdupz(filename);
-                cg->io_service_bytes.enabled = cgroup_enable_blkio_io;
-                debug(D_CGROUP, "io_service_bytes filename for cgroup '%s': '%s'", cg->id, cg->io_service_bytes.filename);
+            if(unlikely(cgroup_enable_blkio_io && !cg->io_service_bytes.filename)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_service_bytes", cgroup_blkio_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->io_service_bytes.filename = strdupz(filename);
+                    cg->io_service_bytes.enabled = cgroup_enable_blkio_io;
+                    debug(D_CGROUP, "io_service_bytes filename for cgroup '%s': '%s'", cg->id, cg->io_service_bytes.filename);
+                }
+                else
+                    debug(D_CGROUP, "io_service_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
             }
-            else
-                debug(D_CGROUP, "io_service_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
-        }
 
-        if(unlikely(cgroup_enable_blkio_ops && !cg->io_serviced.filename)) {
-            snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_serviced", cgroup_blkio_base, cg->id);
-            if(likely(stat(filename, &buf) != -1)) {
-                cg->io_serviced.filename = strdupz(filename);
-                cg->io_serviced.enabled = cgroup_enable_blkio_ops;
-                debug(D_CGROUP, "io_serviced filename for cgroup '%s': '%s'", cg->id, cg->io_serviced.filename);
+            if(unlikely(cgroup_enable_blkio_ops && !cg->io_serviced.filename)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_serviced", cgroup_blkio_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->io_serviced.filename = strdupz(filename);
+                    cg->io_serviced.enabled = cgroup_enable_blkio_ops;
+                    debug(D_CGROUP, "io_serviced filename for cgroup '%s': '%s'", cg->id, cg->io_serviced.filename);
+                }
+                else
+                    debug(D_CGROUP, "io_serviced file for cgroup '%s': '%s' does not exist.", cg->id, filename);
+            }
+
+            if(unlikely(cgroup_enable_blkio_throttle_io && !cg->throttle_io_service_bytes.filename)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_service_bytes", cgroup_blkio_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->throttle_io_service_bytes.filename = strdupz(filename);
+                    cg->throttle_io_service_bytes.enabled = cgroup_enable_blkio_throttle_io;
+                    debug(D_CGROUP, "throttle_io_service_bytes filename for cgroup '%s': '%s'", cg->id, cg->throttle_io_service_bytes.filename);
+                }
+                else
+                    debug(D_CGROUP, "throttle_io_service_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
             }
-            else
-                debug(D_CGROUP, "io_serviced file for cgroup '%s': '%s' does not exist.", cg->id, filename);
-        }
 
-        if(unlikely(cgroup_enable_blkio_throttle_io && !cg->throttle_io_service_bytes.filename)) {
-            snprintfz(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_service_bytes", cgroup_blkio_base, cg->id);
-            if(likely(stat(filename, &buf) != -1)) {
-                cg->throttle_io_service_bytes.filename = strdupz(filename);
-                cg->throttle_io_service_bytes.enabled = cgroup_enable_blkio_throttle_io;
-                debug(D_CGROUP, "throttle_io_service_bytes filename for cgroup '%s': '%s'", cg->id, cg->throttle_io_service_bytes.filename);
+            if(unlikely(cgroup_enable_blkio_throttle_ops && !cg->throttle_io_serviced.filename)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_serviced", cgroup_blkio_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->throttle_io_serviced.filename = strdupz(filename);
+                    cg->throttle_io_serviced.enabled = cgroup_enable_blkio_throttle_ops;
+                    debug(D_CGROUP, "throttle_io_serviced filename for cgroup '%s': '%s'", cg->id, cg->throttle_io_serviced.filename);
+                }
+                else
+                    debug(D_CGROUP, "throttle_io_serviced file for cgroup '%s': '%s' does not exist.", cg->id, filename);
             }
-            else
-                debug(D_CGROUP, "throttle_io_service_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
-        }
 
-        if(unlikely(cgroup_enable_blkio_throttle_ops && !cg->throttle_io_serviced.filename)) {
-            snprintfz(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_serviced", cgroup_blkio_base, cg->id);
-            if(likely(stat(filename, &buf) != -1)) {
-                cg->throttle_io_serviced.filename = strdupz(filename);
-                cg->throttle_io_serviced.enabled = cgroup_enable_blkio_throttle_ops;
-                debug(D_CGROUP, "throttle_io_serviced filename for cgroup '%s': '%s'", cg->id, cg->throttle_io_serviced.filename);
+            if(unlikely(cgroup_enable_blkio_merged_ops && !cg->io_merged.filename)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_merged", cgroup_blkio_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->io_merged.filename = strdupz(filename);
+                    cg->io_merged.enabled = cgroup_enable_blkio_merged_ops;
+                    debug(D_CGROUP, "io_merged filename for cgroup '%s': '%s'", cg->id, cg->io_merged.filename);
+                }
+                else
+                    debug(D_CGROUP, "io_merged file for cgroup '%s': '%s' does not exist.", cg->id, filename);
             }
-            else
-                debug(D_CGROUP, "throttle_io_serviced file for cgroup '%s': '%s' does not exist.", cg->id, filename);
-        }
 
-        if(unlikely(cgroup_enable_blkio_merged_ops && !cg->io_merged.filename)) {
-            snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_merged", cgroup_blkio_base, cg->id);
-            if(likely(stat(filename, &buf) != -1)) {
-                cg->io_merged.filename = strdupz(filename);
-                cg->io_merged.enabled = cgroup_enable_blkio_merged_ops;
-                debug(D_CGROUP, "io_merged filename for cgroup '%s': '%s'", cg->id, cg->io_merged.filename);
+            if(unlikely(cgroup_enable_blkio_queued_ops && !cg->io_queued.filename)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_queued", cgroup_blkio_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->io_queued.filename = strdupz(filename);
+                    cg->io_queued.enabled = cgroup_enable_blkio_queued_ops;
+                    debug(D_CGROUP, "io_queued filename for cgroup '%s': '%s'", cg->id, cg->io_queued.filename);
+                }
+                else
+                    debug(D_CGROUP, "io_queued file for cgroup '%s': '%s' does not exist.", cg->id, filename);
             }
-            else
-                debug(D_CGROUP, "io_merged file for cgroup '%s': '%s' does not exist.", cg->id, filename);
         }
+        else if(likely(cgroup_unified_exist)) {
+            if(unlikely(cgroup_enable_blkio_io && !cg->io_service_bytes.filename)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/io.stat", cgroup_unified_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->io_service_bytes.filename = strdupz(filename);
+                    cg->io_service_bytes.enabled = cgroup_enable_blkio_io;
+                    debug(D_CGROUP, "io.stat filename for unified cgroup '%s': '%s'", cg->id, cg->io_service_bytes.filename);
+                } else
+                    debug(D_CGROUP, "io.stat file for unified cgroup '%s': '%s' does not exist.", cg->id, filename);
+            }
+            if (unlikely(cgroup_enable_blkio_ops && !cg->io_serviced.filename)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/io.stat", cgroup_unified_base, cg->id);
+                if (likely(stat(filename, &buf) != -1)) {
+                    cg->io_serviced.filename = strdupz(filename);
+                    cg->io_serviced.enabled = cgroup_enable_blkio_ops;
+                    debug(D_CGROUP, "io.stat filename for unified cgroup '%s': '%s'", cg->id, cg->io_service_bytes.filename);
+                } else
+                    debug(D_CGROUP, "io.stat file for unified cgroup '%s': '%s' does not exist.", cg->id, filename);
+            }
+            if(unlikely(cgroup_enable_cpuacct_stat && !cg->cpuacct_stat.filename)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/cpu.stat", cgroup_unified_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->cpuacct_stat.filename = strdupz(filename);
+                    cg->cpuacct_stat.enabled = cgroup_enable_cpuacct_stat;
+                    cg->filename_cpuset_cpus = NULL;
+                    cg->filename_cpu_cfs_period = NULL;
+                    cg->filename_cpu_cfs_quota = NULL;
+                    debug(D_CGROUP, "cpu.stat filename for unified cgroup '%s': '%s'", cg->id, cg->cpuacct_stat.filename);
+                }
+                else
+                    debug(D_CGROUP, "cpu.stat file for unified cgroup '%s': '%s' does not exist.", cg->id, filename);
+            }
+            if(unlikely((cgroup_enable_detailed_memory || cgroup_used_memory_without_cache) && !cg->memory.filename_detailed && (cgroup_used_memory_without_cache || cgroup_enable_systemd_services_detailed_memory || !(cg->options & CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE)))) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/memory.stat", cgroup_unified_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->memory.filename_detailed = strdupz(filename);
+                    cg->memory.enabled_detailed = (cgroup_enable_detailed_memory == CONFIG_BOOLEAN_YES)?CONFIG_BOOLEAN_YES:CONFIG_BOOLEAN_AUTO;
+                    debug(D_CGROUP, "memory.stat filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_detailed);
+                }
+                else
+                    debug(D_CGROUP, "memory.stat file for cgroup '%s': '%s' does not exist.", cg->id, filename);
+            }
+
+            if(unlikely(cgroup_enable_memory && !cg->memory.filename_usage_in_bytes)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/memory.current", cgroup_unified_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->memory.filename_usage_in_bytes = strdupz(filename);
+                    cg->memory.enabled_usage_in_bytes = cgroup_enable_memory;
+                    debug(D_CGROUP, "memory.current filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_usage_in_bytes);
+                    snprintfz(filename, FILENAME_MAX, "%s%s/memory.max", cgroup_unified_base, cg->id);
+                    cg->filename_memory_limit = strdupz(filename);
+                }
+                else
+                    debug(D_CGROUP, "memory.current file for cgroup '%s': '%s' does not exist.", cg->id, filename);
+            }
 
-        if(unlikely(cgroup_enable_blkio_queued_ops && !cg->io_queued.filename)) {
-            snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_queued", cgroup_blkio_base, cg->id);
-            if(likely(stat(filename, &buf) != -1)) {
-                cg->io_queued.filename = strdupz(filename);
-                cg->io_queued.enabled = cgroup_enable_blkio_queued_ops;
-                debug(D_CGROUP, "io_queued filename for cgroup '%s': '%s'", cg->id, cg->io_queued.filename);
+            if(unlikely(cgroup_enable_swap && !cg->memory.filename_msw_usage_in_bytes)) {
+                snprintfz(filename, FILENAME_MAX, "%s%s/memory.swap.current", cgroup_unified_base, cg->id);
+                if(likely(stat(filename, &buf) != -1)) {
+                    cg->memory.filename_msw_usage_in_bytes = strdupz(filename);
+                    cg->memory.enabled_msw_usage_in_bytes = cgroup_enable_swap;
+                    snprintfz(filename, FILENAME_MAX, "%s%s/memory.swap.max", cgroup_unified_base, cg->id);
+                    cg->filename_memoryswap_limit = strdupz(filename);
+                    debug(D_CGROUP, "memory.swap.current filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_msw_usage_in_bytes);
+                }
+                else
+                    debug(D_CGROUP, "memory.swap file for cgroup '%s': '%s' does not exist.", cg->id, filename);
             }
-            else
-                debug(D_CGROUP, "io_queued file for cgroup '%s': '%s' does not exist.", cg->id, filename);
         }
     }
 
@@ -2083,8 +2332,15 @@ void update_systemd_services_charts(
             continue;
 
         if(likely(do_cpu && cg->cpuacct_stat.updated)) {
-            if(unlikely(!cg->rd_cpu))
-                cg->rd_cpu = rrddim_add(st_cpu, cg->chart_id, cg->chart_title, 100, system_hz, RRD_ALGORITHM_INCREMENTAL);
+            if(unlikely(!cg->rd_cpu)){
+
+
+                if (!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) {
+                    cg->rd_cpu = rrddim_add(st_cpu, cg->chart_id, cg->chart_title, 100, system_hz, RRD_ALGORITHM_INCREMENTAL);
+                } else {
+                    cg->rd_cpu = rrddim_add(st_cpu, cg->chart_id, cg->chart_title, 100, 1000000, RRD_ALGORITHM_INCREMENTAL);
+                }
+            }
 
             rrddim_set_by_pointer(st_cpu, cg->rd_cpu, cg->cpuacct_stat.user + cg->cpuacct_stat.system);
         }
@@ -2368,12 +2624,32 @@ static inline int update_memory_limits(char **filename, RRDSETVAR **chart_var, u
         }
 
         if(*filename && *chart_var) {
-            if(read_single_number_file(*filename, value)) {
-                error("Cannot refresh cgroup %s memory limit by reading '%s'. Will not update its limit anymore.", cg->id, *filename);
-                freez(*filename);
-                *filename = NULL;
-            }
-            else {
+            if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) {
+                if(read_single_number_file(*filename, value)) {
+                    error("Cannot refresh cgroup %s memory limit by reading '%s'. Will not update its limit anymore.", cg->id, *filename);
+                    freez(*filename);
+                    *filename = NULL;
+                }
+                else {
+                    rrdsetvar_custom_chart_variable_set(*chart_var, (calculated_number)(*value / (1024 * 1024)));
+                    return 1;
+                }
+            } else {
+                char buffer[30 + 1];
+                int ret = read_file(*filename, buffer, 30);
+                if(ret) {
+                    error("Cannot refresh cgroup %s memory limit by reading '%s'. Will not update its limit anymore.", cg->id, *filename);
+                    freez(*filename);
+                    *filename = NULL;
+                    return 0;
+                }
+                char *s = "max\n\0";
+                if(strsame(s, buffer) == 0){
+                    *value = UINT64_MAX;
+                    rrdsetvar_custom_chart_variable_set(*chart_var, (calculated_number)(*value / (1024 * 1024)));
+                    return 1;
+                }
+                *value = str2ull(buffer);
                 rrdsetvar_custom_chart_variable_set(*chart_var, (calculated_number)(*value / (1024 * 1024)));
                 return 1;
             }
@@ -2442,9 +2718,14 @@ void update_cgroup_charts(int update_every) {
                         , update_every
                         , RRDSET_TYPE_STACKED
                 );
-
-                rrddim_add(cg->st_cpu, "user", NULL, 100, system_hz, RRD_ALGORITHM_INCREMENTAL);
-                rrddim_add(cg->st_cpu, "system", NULL, 100, system_hz, RRD_ALGORITHM_INCREMENTAL);
+                if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) {
+                    rrddim_add(cg->st_cpu, "user", NULL, 100, system_hz, RRD_ALGORITHM_INCREMENTAL);
+                    rrddim_add(cg->st_cpu, "system", NULL, 100, system_hz, RRD_ALGORITHM_INCREMENTAL);
+                }
+                else {
+                    rrddim_add(cg->st_cpu, "user", NULL, 100, 1000000, RRD_ALGORITHM_INCREMENTAL);
+                    rrddim_add(cg->st_cpu, "system", NULL, 100, 1000000, RRD_ALGORITHM_INCREMENTAL);
+                }
             }
             else
                 rrdset_next(cg->st_cpu);
@@ -2585,27 +2866,44 @@ void update_cgroup_charts(int update_every) {
                         , update_every
                         , RRDSET_TYPE_STACKED
                 );
-
-                rrddim_add(cg->st_mem, "cache", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
-                rrddim_add(cg->st_mem, "rss", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
-
-                if(cg->memory.detailed_has_swap)
-                    rrddim_add(cg->st_mem, "swap", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
-
-                rrddim_add(cg->st_mem, "rss_huge", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
-                rrddim_add(cg->st_mem, "mapped_file", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+                if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) {
+                    rrddim_add(cg->st_mem, "cache", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+                    rrddim_add(cg->st_mem, "rss", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+
+                    if(cg->memory.detailed_has_swap)
+                        rrddim_add(cg->st_mem, "swap", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+
+                    rrddim_add(cg->st_mem, "rss_huge", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+                    rrddim_add(cg->st_mem, "mapped_file", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+                } else {
+                    rrddim_add(cg->st_mem, "anon", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+                    rrddim_add(cg->st_mem, "kernel_stack", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+                    rrddim_add(cg->st_mem, "slab", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+                    rrddim_add(cg->st_mem, "sock", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+                    rrddim_add(cg->st_mem, "anon_thp", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+                    rrddim_add(cg->st_mem, "file", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+                }
             }
             else
                 rrdset_next(cg->st_mem);
 
-            rrddim_set(cg->st_mem, "cache", cg->memory.total_cache);
-            rrddim_set(cg->st_mem, "rss", (cg->memory.total_rss > cg->memory.total_rss_huge)?(cg->memory.total_rss - cg->memory.total_rss_huge):0);
-
-            if(cg->memory.detailed_has_swap)
-                rrddim_set(cg->st_mem, "swap", cg->memory.total_swap);
+            if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) {
+                rrddim_set(cg->st_mem, "cache", cg->memory.total_cache);
+                rrddim_set(cg->st_mem, "rss", (cg->memory.total_rss > cg->memory.total_rss_huge)?(cg->memory.total_rss - cg->memory.total_rss_huge):0);
 
-            rrddim_set(cg->st_mem, "rss_huge", cg->memory.total_rss_huge);
-            rrddim_set(cg->st_mem, "mapped_file", cg->memory.total_mapped_file);
+                if(cg->memory.detailed_has_swap)
+                    rrddim_set(cg->st_mem, "swap", cg->memory.total_swap);
+
+                rrddim_set(cg->st_mem, "rss_huge", cg->memory.total_rss_huge);
+                rrddim_set(cg->st_mem, "mapped_file", cg->memory.total_mapped_file);
+            } else {
+                rrddim_set(cg->st_mem, "anon", cg->memory.anon);
+                rrddim_set(cg->st_mem, "kernel_stack", cg->memory.kernel_stack);
+                rrddim_set(cg->st_mem, "slab", cg->memory.slab);
+                rrddim_set(cg->st_mem, "sock", cg->memory.sock);
+                rrddim_set(cg->st_mem, "anon_thp", cg->memory.anon_thp);
+                rrddim_set(cg->st_mem, "file", cg->memory.total_mapped_file);
+            }
             rrdset_done(cg->st_mem);
 
             if(unlikely(!cg->st_writeback)) {
@@ -2640,33 +2938,35 @@ void update_cgroup_charts(int update_every) {
             rrddim_set(cg->st_writeback, "writeback", cg->memory.total_writeback);
             rrdset_done(cg->st_writeback);
 
-            if(unlikely(!cg->st_mem_activity)) {
-                snprintfz(title, CHART_TITLE_MAX, "Memory Activity for cgroup %s", cg->chart_title);
-
-                cg->st_mem_activity = rrdset_create_localhost(
-                        cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX)
-                        , "mem_activity"
-                        , NULL
-                        , "mem"
-                        , "cgroup.mem_activity"
-                        , title
-                        , "MiB/s"
-                        , PLUGIN_CGROUPS_NAME
-                        , PLUGIN_CGROUPS_MODULE_CGROUPS_NAME
-                        , cgroup_containers_chart_priority + 400
-                        , update_every
-                        , RRDSET_TYPE_LINE
-                );
+            if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) {
+                if(unlikely(!cg->st_mem_activity)) {
+                    snprintfz(title, CHART_TITLE_MAX, "Memory Activity for cgroup %s", cg->chart_title);
+
+                    cg->st_mem_activity = rrdset_create_localhost(
+                            cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX)
+                            , "mem_activity"
+                            , NULL
+                            , "mem"
+                            , "cgroup.mem_activity"
+                            , title
+                            , "MiB/s"
+                            , PLUGIN_CGROUPS_NAME
+                            , PLUGIN_CGROUPS_MODULE_CGROUPS_NAME
+                            , cgroup_containers_chart_priority + 400
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+
+                    rrddim_add(cg->st_mem_activity, "pgpgin", "in", system_page_size, 1024 * 1024, RRD_ALGORITHM_INCREMENTAL);
+                    rrddim_add(cg->st_mem_activity, "pgpgout", "out", -system_page_size, 1024 * 1024, RRD_ALGORITHM_INCREMENTAL);
+                }
+                else
+                    rrdset_next(cg->st_mem_activity);
 
-                rrddim_add(cg->st_mem_activity, "pgpgin", "in", system_page_size, 1024 * 1024, RRD_ALGORITHM_INCREMENTAL);
-                rrddim_add(cg->st_mem_activity, "pgpgout", "out", -system_page_size, 1024 * 1024, RRD_ALGORITHM_INCREMENTAL);
+                rrddim_set(cg->st_mem_activity, "pgpgin", cg->memory.total_pgpgin);
+                rrddim_set(cg->st_mem_activity, "pgpgout", cg->memory.total_pgpgout);
+                rrdset_done(cg->st_mem_activity);
             }
-            else
-                rrdset_next(cg->st_mem_activity);
-
-            rrddim_set(cg->st_mem_activity, "pgpgin", cg->memory.total_pgpgin);
-            rrddim_set(cg->st_mem_activity, "pgpgout", cg->memory.total_pgpgout);
-            rrdset_done(cg->st_mem_activity);
 
             if(unlikely(!cg->st_pgfaults)) {
                 snprintfz(title, CHART_TITLE_MAX, "Memory Page Faults for cgroup %s", cg->chart_title);
@@ -2723,7 +3023,11 @@ void update_cgroup_charts(int update_every) {
                 rrdset_next(cg->st_mem_usage);
 
             rrddim_set(cg->st_mem_usage, "ram", cg->memory.usage_in_bytes - ((cgroup_used_memory_without_cache)?cg->memory.total_cache:0));
-            rrddim_set(cg->st_mem_usage, "swap", (cg->memory.msw_usage_in_bytes > cg->memory.usage_in_bytes)?cg->memory.msw_usage_in_bytes - cg->memory.usage_in_bytes:0);
+            if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) {
+                rrddim_set(cg->st_mem_usage, "swap", (cg->memory.msw_usage_in_bytes > cg->memory.usage_in_bytes)?cg->memory.msw_usage_in_bytes - cg->memory.usage_in_bytes:0);
+            } else {
+                rrddim_set(cg->st_mem_usage, "swap", cg->memory.msw_usage_in_bytes);
+            }
             rrdset_done(cg->st_mem_usage);
 
             if (likely(update_memory_limits(&cg->filename_memory_limit, &cg->chart_var_memory_limit, &cg->memory_limit, "memory_limit", cg))) {