plugins.d/cgroup-name.sh

   1 #!/bin/bash
   2
   3 export PATH="${PATH}:/sbin:/usr/sbin:/usr/local/sbin"
   4 export LC_ALL=C
   5
   6 NETDATA_CONFIG_DIR="${NETDATA_CONFIG_DIR-/etc/netdata}"
   7 CONFIG="${NETDATA_CONFIG_DIR}/cgroups-names.conf"
   8 CGROUP="${1}"
   9 NAME=
  10
  11 if [ -z "${CGROUP}" ]
  12         then
  13         echo >&2 "${0}: called without a cgroup name. Nothing to do."
  14         exit 1
  15 fi
  16
  17 if [ -f "${CONFIG}" ]
  18         then
  19         NAME="$(cat "${CONFIG}" | grep "^${CGROUP} " | sed "s/[[:space:]]\+/ /g" | cut -d ' ' -f 2)"
  20         if [ -z "${NAME}" ]
  21                 then
  22                 echo >&2 "${0}: cannot find cgroup '${CGROUP}' in '${CONFIG}'."
  23         fi
  24 #else
  25 #       echo >&2 "${0}: configuration file '${CONFIG}' is not available."
  26 fi
  27
  28 function get_name_classic {
  29         DOCKERID=$1
  30         echo >&2 "Running command: docker ps --filter=id=\"${DOCKERID}\" --format=\"{{.Names}}\""
  31         NAME="$( docker ps --filter=id="${DOCKERID}" --format="{{.Names}}" )"
  32 }
  33
  34 function get_name_api {
  35         DOCKERID=$1
  36         if [ ! -S "/var/run/docker.sock" ]
  37                 then
  38                 echo >&2 "Can't find /var/run/docker.sock"
  39                 return
  40         fi
  41         echo >&2 "Running API command: /containers/${DOCKERID}/json"
  42         JSON=$(echo -e "GET /containers/${DOCKERID}/json HTTP/1.0\r\n" | nc -U /var/run/docker.sock | egrep '^{.*')
  43         NAME=$(echo $JSON | jq -r .Name,.Config.Hostname | grep -v null | head -n1 | sed 's|^/||')
  44 }
  45
  46 if [ -z "${NAME}" ]
  47         then
  48         if [[ "${CGROUP}" =~ ^.*docker[-/\.][a-fA-F0-9]+[-\.]?.*$ ]]
  49                 then
  50                 DOCKERID="$( echo "${CGROUP}" | sed "s|^.*docker[-/]\([a-fA-F0-9]\+\)[-\.]\?.*$|\1|" )"
  51
  52                 if [ ! -z "${DOCKERID}" -a \( ${#DOCKERID} -eq 64 -o ${#DOCKERID} -eq 12 \) ]
  53                         then
  54                         if hash docker 2>/dev/null
  55                                 then
  56                                 get_name_classic $DOCKERID
  57                         else
  58                                 get_name_api $DOCKERID
  59                         fi
  60                         if [ -z "${NAME}" ]
  61                                 then
  62                                 echo >&2 "Cannot find the name of docker container '${DOCKERID}'"
  63                                 NAME="${DOCKERID:0:12}"
  64                         else
  65                                 echo >&2 "Docker container '${DOCKERID}' is named '${NAME}'"
  66                         fi
  67                 fi
  68         fi
  69
  70         [ -z "${NAME}" ] && NAME="${CGROUP}"
  71         [ ${#NAME} -gt 50 ] && NAME="${NAME:0:50}"
  72 fi
  73
  74 echo >&2 "${0}: cgroup '${CGROUP}' is called '${NAME}'"
  75 echo "${NAME}"