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#!/usr/bin/env bash
# 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
}
debug=0
debug() {
[ $debug -eq 1 ] && log DEBUG "${@}"
}
# -----------------------------------------------------------------------------
[ -z "${NETDATA_USER_CONFIG_DIR}" ] && NETDATA_USER_CONFIG_DIR="@configdir_POST@"
[ -z "${NETDATA_STOCK_CONFIG_DIR}" ] && NETDATA_STOCK_CONFIG_DIR="@libconfigdir_POST@"
DOCKER_HOST="${DOCKER_HOST:=/var/run/docker.sock}"
CGROUP="${1}"
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 '${CONFIG}' is not available."
fi
done
function docker_get_name_classic {
local id="${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 ${DOCKER_HOST}"
return 1
fi
info "Running API command: /containers/${id}/json"
JSON=$(echo -e "GET /containers/${id}/json HTTP/1.0\r\n" | nc -U ${DOCKER_HOST} | grep '^{.*')
NAME=$(echo $JSON | jq -r .Name,.Config.Hostname | grep -v null | head -n1 | sed 's|^/||')
return 0
}
function docker_get_name {
local id="${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 '${id}'"
NAME="${id:0:12}"
else
info "docker container '${id}' is named '${NAME}'"
fi
}
if [ -z "${NAME}" ]
then
if [[ "${CGROUP}" =~ ^.*docker[-_/\.][a-fA-F0-9]+[-_\.]?.*$ ]]
then
# docker containers
DOCKERID="$( echo "${CGROUP}" | sed "s|^.*docker[-_/]\([a-fA-F0-9]\+\)[-_\.]\?.*$|\1|" )"
# echo "DOCKERID=${DOCKERID}"
if [ ! -z "${DOCKERID}" -a \( ${#DOCKERID} -eq 64 -o ${#DOCKERID} -eq 12 \) ]
then
docker_get_name "${DOCKERID}"
else
error "a docker id cannot be extracted from docker cgroup '${CGROUP}'."
fi
elif [[ "${CGROUP}" =~ ^.*kubepods[_/].*[_/]pod[a-fA-F0-9-]+[_/][a-fA-F0-9]+$ ]]
then
# kubernetes
DOCKERID="$( echo "${CGROUP}" | sed "s|^.*kubepods[_/].*[_/]pod[a-fA-F0-9-]\+[_/]\([a-fA-F0-9]\+\)$|\1|" )"
# echo "DOCKERID=${DOCKERID}"
if [ ! -z "${DOCKERID}" -a \( ${#DOCKERID} -eq 64 -o ${#DOCKERID} -eq 12 \) ]
then
docker_get_name "${DOCKERID}"
else
error "a docker id cannot be extracted from kubernetes cgroup '${CGROUP}'."
fi
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}"
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