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From 5949405d0031a4aba91c81cb28c24821ad2d439a Mon Sep 17 00:00:00 2001
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From: Reid Wahl <nwahl@redhat.com>
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Date: Thu, 3 Jan 2019 15:05:20 -0800
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Subject: [PATCH] docker: Fix issues with stop operation
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The docker RA's stop operation doesn't behave properly in some cases.
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1. It returns a false success code in case of an error response from
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the daemon.
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2. It fails at `remove_container()` if the container does not exist
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but another docker object of the same name does exist.
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In case #1, the `container_exists()` function returns the same exit code
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(1) if the container is not found (an expected error) or if there is an
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error response from the docker daemon (an unexpected error). These types
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of errors should be handled differently.
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In case #2, the `docker inspect` calls do not limit their search to
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containers. So if a non-container object is found with a matching name,
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the RA attempts to remove a container by that name. Such a container may
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not exist.
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This patch fixes these issues as follows:
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1. Match an error response in `container_exists()` against the string
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"No such container".
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2. Add `--type=container` to the `docker inspect` calls to restrict
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the match.
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---
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heartbeat/docker | 26 ++++++++++++++++++++++----
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1 file changed, 22 insertions(+), 4 deletions(-)
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diff --git a/heartbeat/docker b/heartbeat/docker
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index f5ba83ff2..c206344ad 100755
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--- a/heartbeat/docker
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+++ b/heartbeat/docker
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@@ -215,7 +215,7 @@ monitor_cmd_exec()
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out=$(docker exec ${CONTAINER} $OCF_RESKEY_monitor_cmd 2>&1)
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rc=$?
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else
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- out=$(echo "$OCF_RESKEY_monitor_cmd" | nsenter --target $(docker inspect --format {{.State.Pid}} ${CONTAINER}) --mount --uts --ipc --net --pid 2>&1)
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+ out=$(echo "$OCF_RESKEY_monitor_cmd" | nsenter --target $(docker inspect --type=container --format {{.State.Pid}} ${CONTAINER}) --mount --uts --ipc --net --pid 2>&1)
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rc=$?
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fi
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@@ -236,7 +236,25 @@ monitor_cmd_exec()
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container_exists()
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{
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- docker inspect --format {{.State.Running}} $CONTAINER | egrep '(true|false)' >/dev/null 2>&1
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+ local err
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+
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+ err=$(docker inspect --type=container $CONTAINER 2>&1 >/dev/null)
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+
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+ if [ $? -ne $OCF_SUCCESS ]; then
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+ case $err in
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+ *"No such container"*)
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+ # Return failure instead of exiting if container does not exist
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+ return 1
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+ ;;
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+ *)
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+ # Exit if error running command
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+ ocf_exit_reason "$err"
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+ exit $OCF_ERR_GENERIC
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+ ;;
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+ esac
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+ fi
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+
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+ return $OCF_SUCCESS
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}
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remove_container()
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@@ -265,7 +283,7 @@ docker_simple_status()
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fi
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# retrieve the 'Running' attribute for the container
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- val=$(docker inspect --format {{.State.Running}} $CONTAINER 2>/dev/null)
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+ val=$(docker inspect --type=container --format {{.State.Running}} $CONTAINER 2>/dev/null)
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if [ $? -ne 0 ]; then
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#not running as a result of container not being found
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return $OCF_NOT_RUNNING
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@@ -295,7 +313,7 @@ docker_health_status()
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# if starting takes longer than monitor timeout then upstream will make this fail.
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while
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- val=$(docker inspect --format {{.State.Health.Status}} $CONTAINER 2>/dev/null)
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+ val=$(docker inspect --type=container --format {{.State.Health.Status}} $CONTAINER 2>/dev/null)
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if [ $? -ne 0 ]; then
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#not healthy as a result of container not being found
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return $OCF_NOT_RUNNING
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