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dockercassandracqlcqlsh

Passing local CQL commands file to Cassandra Docker container

Is it possible to pass a local file for CQL commands to a Cassandra Docker container?

Using docker exec fails as it cannot find the local file:

me@meanwhileinhell:~$ ls -al
-rw-r--r--  1 me me  1672 Sep 28 11:02 createTables.cql

me@meanwhileinhell:~$ docker exec -i cassandra_1 cqlsh -f createTables.cql
Can't open 'createTables.cql': [Errno 2] No such file or directory: ‘createTables.cql'

I would really like not to have to open a bash session and run a script that way.

Solution

  • The container needs to be able to access the script first before you can execute it (i.e. the script file needs to be inside the container). If this is just a quick one-off run of the script, the easiest thing to do is probably to just use the docker cp command to copy the script from your host to the container:

    $ docker cp createTables.cql container_name:/path/in/container

    You should then be able to use docker exec to run the script at whatever path you copied it to inside the container. If this is something that's a work in progress and you might be changing and re-running the script while you're working on it, you might be better off mounting a directory with your scripts from your host inside the container. For that you'll probably want the -v option of docker run.

    Hope that helps!