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#!/usr/bin/env bash
# netdata
# real-time performance and health monitoring, done right!
# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
# GPL v3+
#
# 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() {
[ $debug -eq 1 ] && log DEBUG "${@}"
}
# -----------------------------------------------------------------------------
NETDATA_CONFIG_DIR="${NETDATA_CONFIG_DIR-/etc/netdata}"
CONFIG="${NETDATA_CONFIG_DIR}/cgroups-names.conf"
CGROUP="${1}"
NAME=
# -----------------------------------------------------------------------------
if [ -z "${CGROUP}" ]
then
fatal "called without a cgroup name. Nothing to do."
fi
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 '${CONFIG}'."
fi
#else
# info "configuration file '${CONFIG}' is not available."
fi
function get_name_classic {
local DOCKERID="$1"
info "Running command: docker ps --filter=id=\"${DOCKERID}\" --format=\"{{.Names}}\""
NAME="$( docker ps --filter=id="${DOCKERID}" --format="{{.Names}}" )"
return 0
}
function get_name_api {
local DOCKERID="$1"
if [ ! -S "/var/run/docker.sock" ]
then
warning "Can't find /var/run/docker.sock"
return 1
fi
info "Running API command: /containers/${DOCKERID}/json"
JSON=$(echo -e "GET /containers/${DOCKERID}/json HTTP/1.0\r\n" | nc -U /var/run/docker.sock | egrep '^{.*')
NAME=$(echo $JSON | jq -r .Name,.Config.Hostname | grep -v null | head -n1 | sed 's|^/||')
return 0
}
if [ -z "${NAME}" ]
then
if [[ "${CGROUP}" =~ ^.*docker[-_/\.][a-fA-F0-9]+[-_\.]?.*$ ]]
then
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
if hash docker 2>/dev/null
then
get_name_classic $DOCKERID
else
get_name_api $DOCKERID || get_name_classic $DOCKERID
fi
if [ -z "${NAME}" ]
then
warning "cannot find the name of docker container '${DOCKERID}'"
NAME="${DOCKERID:0:12}"
else
info "docker container '${DOCKERID}' is named '${NAME}'"
fi
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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