agents/plugins/mk_docker_container_piggybacked

   1 #!/bin/bash
   2 # +------------------------------------------------------------------+
   3 # |             ____ _               _        __  __ _  __           |
   4 # |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
   5 # |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
   6 # |           | |___| | | |  __/ (__|   <    | |  | | . \            |
   7 # |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
   8 # |                                                                  |
   9 # | Copyright Mathias Kettner 2018             mk@mathias-kettner.de |
  10 # +------------------------------------------------------------------+
  11 #
  12 # This file is part of Check_MK.
  13 # The official homepage is at http://mathias-kettner.de/check_mk.
  14 #
  15 # check_mk is free software;  you can redistribute it and/or modify it
  16 # under the  terms of the  GNU General Public License  as published by
  17 # the Free Software Foundation in version 2.  check_mk is  distributed
  18 # in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
  19 # out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
  20 # PARTICULAR PURPOSE. See the  GNU General Public License for more de-
  21 # tails. You should have  received  a copy of the  GNU  General Public
  22 # License along with GNU Make; see the file  COPYING.  If  not,  write
  23 # to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
  24 # Boston, MA 02110-1301 USA.
  25
  26 # $REMOTE is exported from check_mk_agent.linux
  27
  28 if type docker > /dev/null 2>&1; then
  29     NODE_NAME=$(docker info --format "{{json .Name}}")
  30
  31     # For the container status, we want information about *all* containers
  32     for CONTAINER_ID in $(docker container ls -q --all); do
  33         echo "<<<<${CONTAINER_ID}>>>>"
  34         docker inspect "$CONTAINER_ID" \
  35             --format='{{println "<<<docker_container_status>>>"}}{{json .State}}{{println}}{{println "<<<docker_container_node_name>>>"}}{{println '"$NODE_NAME"'}}{{println "<<<docker_container_labels>>>"}}{{json .Config.Labels}}{{println}}{{println "<<<docker_container_network>>>"}}{{json .NetworkSettings}}{{println}}'
  36
  37         if [ "$(docker inspect -f '{{.State.Running}}' "$CONTAINER_ID")" = "true" ]; then
  38             # Is there a regular agent available in the container? Use it!
  39             #
  40             # Otherwise execute the agent of the node in the context of the container.
  41             # Using this approach we should always get at least basic information from
  42             # the container.
  43             # Once it comes to plugins and custom configuration the user needs to use
  44             # a little more complex setup. Have a look at the documentation.
  45             AGENT_PATH=$(docker container exec "$CONTAINER_ID" bash -c "type check_mk_agent" 2>/dev/null) || AGENT_PATH=
  46             if [ -n "$AGENT_PATH" ]; then
  47                 docker container exec --env "REMOTE=$REMOTE" "$CONTAINER_ID" check_mk_agent
  48             elif docker container exec "$CONTAINER_ID" which bash >/dev/null 2>&1; then
  49                 docker container exec --env MK_FROM_NODE=1 --env "REMOTE=$REMOTE" -i "$CONTAINER_ID" bash < "$0"
  50             fi
  51         fi
  52
  53         echo "<<<<>>>>"
  54     done
  55 fi