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https://issues.apache.org/jira/browse/MESOS-4812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15245931#comment-15245931
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haosdent commented on MESOS-4812:
---------------------------------
{quote}
What you have to send to Mesos is
/bin/bash -c \"</dev/tcp/$HOST/$PORT0\"
{quote}
Actually this is not true. You know I use C++ here, and I have to add \, just
like why you need add \ in json
{code}
command.set_value("bash -c \"</dev/tcp/$HOST/$PORT0\"");
{code}
If I don't add \, compile would failed. Because
{code}
command.set_value("bash -c "</dev/tcp/$HOST/$PORT0"");
{code}
is illegal C++ sytnax.
As you see,
{code}
"bash -c \"</dev/tcp/$HOST/$PORT0\""
{code}
would become the string
{code}
bash -c </dev/tcp/$HOST/$PORT0
{code}
in C++.
Anyway, do you mind try my task definition in your side?
{code}
{
"id": "/test-health",
"cmd": "sleep 200",
"healthChecks": [{
"protocol": "COMMAND",
"command": {
"value": "bash -c \"</dev/tcp/www.google.com/80\""
},
"gracePeriodSeconds": 300,
"intervalSeconds": 60,
"timeoutSeconds": 20,
"maxConsecutiveFailures": 3,
"ignoreHttp1xx": false
}]
}
{code}
I sure it would running correctly in my marathon. If you not convenience at
this, I would like to send you a video to prove this.
> Mesos fails to escape command health checks
> -------------------------------------------
>
> Key: MESOS-4812
> URL: https://issues.apache.org/jira/browse/MESOS-4812
> Project: Mesos
> Issue Type: Bug
> Affects Versions: 0.25.0
> Reporter: Lukas Loesche
> Assignee: haosdent
> Labels: health-check
>
> As described in https://github.com/mesosphere/marathon/issues/3333
> I would like to run a command health check
> {noformat}
> /bin/bash -c "</dev/tcp/$HOST/$PORT0"
> {noformat}
> The health check fails because Mesos, while running the command inside double
> quotes of a sh -c "" doesn't escape the double quotes in the command.
> If I escape the double quotes myself the command health check succeeds. But
> this would mean that the user needs intimate knowledge of how Mesos executes
> his commands which can't be right.
> I was told this is not a Marathon but a Mesos issue so am opening this JIRA.
> I don't know if this only affects the command health check.
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