How to add run arguments within docker test containers

user_6683066 0
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For the particular image I am trying to run with test containers, it is required to start the container like so after building:

docker run \
  -v ~/volume:/tmp/volume\
  --cap-add SYS_NICE --cap-add SYS_RESOURCE --cap-add SYS_PTRACE\
  docker-image

However i'm wondering how I go about adding the runtime options --cap-add SYS_NICE --cap-add SYS_RESOURCE --cap-add SYS_PTRACE portion to either the Dockerfile and build my own local copy or use the TestContainer methods or would this even be achieved from configuring the docker daemon? I thought Container.withCommand() did this but seems to overwrite the starting command, not adding these run arguments as far as i am aware.

testcontainers junit5 docker integration-testing java
1 Answers

You can make use of GenericContainer#withCreateContainerCmdModifier(...), here is the full example:

new GenericContainer<>(
            DOCKER_HOST_CONTAINER_NAME
        ).withCreateContainerCmdModifier(
            it -> it.withHostConfig(
                HostConfig.newHostConfig()
                    .withCapAdd(Capability.NET_ADMIN, Capability.NET_RAW)
                    .withNetworkMode(network.getId())
            )
        ).withNetwork(network)
            .withNetworkAliases(dockerHostName)
            .waitingFor(
                Wait.forLogMessage(".*Forwarding ports.*", 1)
            )
user_117738240
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