Merge branch 'master' into ab-debian

[netdata.git] / plugins.d / cgroup-name.sh

diff --git a/plugins.d/cgroup-name.sh b/plugins.d/cgroup-name.sh
index 1be3aec1f83a525ad8ac676752cbe54d760ecaef..a1e3abe081ad2825fb2edb5321f1c9eb4a2a38db 100755 (executable)
--- a/plugins.d/cgroup-name.sh
+++ b/plugins.d/cgroup-name.sh
@@ -1,45 +1,134 @@
-#!/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="$(docker ps --filter=id="${CGROUP:7:64}" --format="{{.Names}}")"
-       [ -z "${NAME}" ] && NAME="${CGROUP:0:19}"
-       [ ${#NAME} -gt 20 ] && NAME="${NAME:0:20}"
-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}"