hostname (from shell) seems to return a hash (12 hex digits) that is presumably unique and is used as the prefix for reporting logs to Papertrail
That is indeed a (truncated) container ID. You’ll find it in your logs in Papertrail, as well as the metrics in the Dashboard.
The post also refers to an env variable APTIBLE_PROCESS_INDEX but either it’s not visible in ephemeral clones created via CLI aptible ssh command or it’s been deprecated.
This variable is not present in
aptible ssh sessions, because they’re not instances of any particular service.
That variable is however present for your app containers. You can find the documentation for it here: https://www.aptible.com/documentation/enclave/reference/containers/environment.html#aptible-process-index
To compose a unique ID, you should use this variable in combination with
APTIBLE_PROCESS_TYPE. The pair of two variables is unique for all containers in a given release of your app.
I’ll go with hostname for now but curious if there’s another preferred variable.
The two variables differ in one way:
- The container ID is unique across releases. That is, if you redeploy your app, all the containers will get new container IDs, and new hostnames.
APTIBLE_PROCESS_INDEX pair is not be unique across releases. When you redeploy your app, new containers will use the same values as containers from the past release (you could however use the
APTIBLE_RELEASE_HREF variable to work around this).
For your use case, the container ID / hostname is probably more appropriate.