Start container with hostname

[rahul-swaminathan]

We are using GenericContainer and we need to set a specific hostname for our container. Right now, we are using withExtraHosts and hardcoding the ip address that the container always starts with. This creates 2 entries in /etc/hosts with the same ip address. We'd rather have a function withHostName that leverages

dockerClient.createContainerCmd().withHostName

[rnorth]

Hi Rahul
Thanks for using Testcontainers and for raising this - seems perfectly sensible to me and isn't a big change. We can probably do this quickly. However, if it's urgent, if you'd care to raise a PR we'd be able to include this even sooner!
Thanks
Richard

[bsideup]

FYI this PR will make it possible to configure hostname manually:
#301

[rnorth]

@bsideup yes, you're right!

[rahul-swaminathan]

awesome, thanks!

[bsideup]

@rahul-swaminathan version 1.2.0 was released, you can find how to tune CreateContainerCmd in the docs now:
https://www.testcontainers.org/usage/options.html#customizing-the-container

Do you still want it implemented as container.withHostName()? If not, I assume we can close this issue for now :)

[edgarvonk]

Hi all, the CreateContainerCmd works fine with the GenericContainer (in our case we use it to set the name of the container upon creation). However I think it is not supported for the JdbcDatabaseContainers? We would like to use the CreateContainerCmd with e.g. the OracleContainer.

[edgarvonk]

Ah sorry, it is possible with a JdbcDatabaseContainer as well. Just a little bit more cumbersome. E.g.:

   @ClassRule
    public static GenericContainer oracleContainer = new OracleContainer()
        .withCreateContainerCmdModifier((Object createContainerCmd) -> {
            ((CreateContainerCmd)createContainerCmd).withName("oracle");
        });

[bsideup]

@edgarvonk

or

    @ClassRule
    public static GenericContainer oracleContainer = new OracleContainer<>()
        .withCreateContainerCmdModifier(it -> it.withName("oracle"));

(note the diamond <> )

[edgarvonk]

Hi @bsideup, I did try that but that is not possible because OracleContainer is not a parameterised type (in contrast to GenericContainer)? This code does not compile for me anyway.

[bsideup]

@edgarvonk,

hm-hm... Does it happen if you change GenericContainer oracleContainer to OracleContainer oracleContainer? without <>

Sorry for that anyway, we're going to polish generics in 2.0

[edgarvonk]

hi @bsideup, no it happens regardless of whether I use GenericContainer or OracleContainer as the variable type.

No problem at all!

[rahul-swaminathan]

@bsideup yup, we switched over to using withCreateContainerCmdModifier and everything works great, thanks!