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#!/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}
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