I noticed that if I edited the name of "mongodb-replicaset" job in containerpilot.json5, the manage.py script would break because the job name is hard coded.

Therefore, I was thinking it would be good to extract that bit out into a global variable. In fact, we could simply use the REPLICASET variable, having it default to "mongodb-replicaset".

manage.py

PRIMARY = get_environ('REPLICASET', 'mongodb-replicaset')
#SECONDARY = get_environ('REPLICASET_SECONDARY', 'mongodb-secondary')

containerpilot.json5

name: "{{ .REPLICASET | default "mongodb-replicaset" }}",

exec: "mongod --replSet={{ .REPLICASET | default "mongodb-replicaset" }}",

name: "onchange-{{ .REPLICASET | default "mongodb-replicaset" }}",

source: "watch.{{ .REPLICASET | default "mongodb-replicaset" }}",

watches: [
    {
      name: "{{ .REPLICASET | default "mongodb-replicaset" }}",
      interval: 2
    }
  ]

local-compose.yml

  mongo:
    environment:
      REPLICASET=awesome-replicaset

Naming conventions:

--replSet doesn't say anything about name restrictions, and the containerpilot job name is adequately restrictive, so would follow the containerpilot name rules.