-#!/bin/bash
+#!/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
- echo >&2 "${0}: called without a cgroup name. Nothing to do."
- exit 1
+ then
+ fatal "called without a cgroup name. Nothing to do."
fi
if [ -f "${CONFIG}" ]
- then
- NAME="$(cat "${CONFIG}" | grep "^${CGROUP} " | sed "s/[[:space:]]\+/ /g" | cut -d ' ' -f 2)"
- if [ -z "${NAME}" ]
- then
- echo >&2 "${0}: cannot find cgroup '${CGROUP}' in '${CONFIG}'."
- fi
-else
- echo >&2 "${0}: configuration file '${CONFIG}' is not available."
+ then
+ NAME="$(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
-if [ -z "${NAME}" -a "${CGROUP:0:7}" = "docker/" ]
- then
- NAME="$(docker ps | grep "^${CGROUP:7:12}" | sed "s/[[:space:]]\+/ /g" | cut -d ' ' -f 2)"
- [ -z "${NAME}" ] && NAME="${CGROUP:0:19}"
-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 [ ${#CGROUP} -gt 20 ]
- then
- NAME="${CGROUP:0:20}"
- else
- NAME="${CGROUP}"
- fi
+ then
+ if [[ "${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
+ 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
+ elif [[ "${CGROUP}" =~ machine.slice_machine.*-qemu ]]
+ then
+ # libvirtd / qemu virtual machines
+
+ NAME="$(echo ${CGROUP} | sed 's/machine.slice_machine.*-qemu//; s/\/x2d//; s/\/x2d/\-/g; s/\.scope//g')"
+ fi
+
+ [ -z "${NAME}" ] && NAME="${CGROUP}"
+ [ ${#NAME} -gt 100 ] && NAME="${NAME:0:100}"
fi
-echo >&2 "${0}: cgroup '${CGROUP}' is named as '${NAME}'"
+info "cgroup '${CGROUP}' is called '${NAME}'"
echo "${NAME}"