I am using Mesosphere Marathon. ON Mesos we host our container application. The number of applications are more. Is there a way we can list down all the container images which are being used in my Mesos rather than going one by one to check in each application configuration.
You can create a script using the marathon API. See https://your.marathon.fqdn/api-console/index.html
The /v2/apps/ endpoint gives a json list of all applications. if you pipe this to jq (or maybe another tool) you can get the list of images:
curl https://your.marathon.fqdn/v2/apps | jq -r .apps[].container.docker.image