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• --network The above example makes use of a Docker network - created with the docker network create js7 command - to allow network sharing between containers. Note that any inside ports used by Docker containers are visible within a Docker network. Therefore a Controller instance running for the inside port 4444 can be accessed using the container's hostname and the same port within the Docker network.
• --publish The Controller is prepared to listen to the HTTP port 4444. An outside port of the Docker host can be mapped to the Controller's inside HTTP port. This is not required for use with a Docker network, see --network, however, it will allow direct access to the Controller from the Docker host through its outside port .
• --env=RUN_JS_JAVA_OPTIONS This allows to Java options to be injected into the Controller's container. Preferably this is used to specify memory requirements of a Controller, e.g. with -Xmx256m.
• --env=RUN_JS_ID This setting specifies the Controller ID that is a unique identifier for either a standalone Controller instance or for both the primary and secondary Controller instances in a cluster that use a common Controller ID.
• --env=RUN_JS_USER_ID Inside the container the Controller is operated with the jobscheduler user account. In order to access, for example, log files created by the Controller and mounted to the Docker host, it is recommended that you map the account that starts the container to the jobscheduler account inside the container. The RUN_JS_USER_ID environment environment variable accepts the user User ID and group Group ID of the account that will be mapped. The example listed above uses the current user, for details see JS7 - Running Containers for User Accounts.
• --mount The following volume mounts are suggested:
  • var: This folder works as an entry point to the following sub-folders:
    • config: The configuration folder allows the specification of  individual settings for the operation of the Controller - see the sections below and the JS7 - Controller Configuration Items article. Default settings are available from initial operation..
    • logs: In order to have persistent Controller log files they have to be written to a volume that is mounted for the container. Feel free to adjust the volume name from the src attribute, however, the value of the dst attribute should not be changed as it reflects the directory hierarchy inside the container.
    • state: The Controller requires a directory for journal information that should be persistent. The journal is required to restore the state of orders when restarting the Controller.

  • Docker offers a number of ways of mounting volumes to containers, which include, for example, creating a local folder and mapping the folder to a volume before executing the docker run command listed above:

    Code Block
    language bash title Example how to create Docker volumes linenumbers true
    # example to map volumes to directories on the Docker host prior to running the Controller container mkdir -p /home/sos/js7/js7-controller-primary/var docker volume create --driver local --opt o=bind --opt type=none --opt device="/home/sos/js7/js7-controller-primary/var" js7-controller-primary-var

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