All container orchestrators like Docker Compose/Docker Swarm/Kubernetes provide a way to set the number of containers to run. While running inside one of these containers, is it possible to determine the number of the container e.g. 5 of 10 where the number I'm looking for is 5. Is this exposed as an environment variable or is there another way to get this number?
In kubernetes you can get container names using jsonpath
containernames=$(kubectl -n kube-system get pod <replacepodname> -o jsonpath={.spec.containers[*].name})Then you can read the names one by one
echo $containernames | awk '{print $1 }' echo $containernames | awk '{print $2 }'
or
set -- $containernames echo $1 echo $2