wait support explicit exec form

[scottmarlow]

Similar to #253, I would like to use the explicit exec form in "wait" to execute the following Docker command after creating a MongoDB container instance:

docker exec some-mongo /bin/sh -c "mongo mongotestdb --eval "db.createUser({ user: 'devuser', pwd: 'changethis', roles: ['dbAdmin'] }); db.auth('devuser', 'changethis'); " "

I need to wait until the MongoDB server has started, before issuing the command, so I would like to do something like:

<wait>
    <time>50000</time>
    <exec>
        <arg>mongo</arg>
        <arg>mongotestdb</arg>
        <arg>-eval </arg>
        <arg>db.createUser({ user: 'devuser', pwd:  'changethis', roles: ['dbAdmin'] }); db.auth('devuser', 'changethis');</arg>
    </exec>
    <tcp>
        <ports>
            <port>27017</port>
        </ports>
    </tcp>
</wait>

One alternative, could be to use a separate "cmd" (that already supports explicit exec form), block on the "wait" completing before running the command.

What do you think?

Currently, [https://github.com/scottmarlow/wildfly-swarm/commits/docker] is not creating a MongoDB user but I would like to change that.

Thanks,
Scott

[rhuss]

Doesn't <exec><postStart>... fit your bill ? Couldn't you already put the command as script into your mongodb image ? We could introduce something like a more complex configuration here, shouldn't be hard. The only challenge would be to keep backwards compat. (e.g. to default to the 'shell' form).