So this was a little bit more painful to figure this than i was expecting, so recording it, so i don't forget....
what i wanted to was access the name of the pod within kubernetes, assign to an environment variable and then mess around with it from another environment variable...
# Getting the pod name
the following configuration will allow me to assign the pod name into an environment variable in kubernetes
env: - name: MY_POD_NAME valueFrom: fieldRef: fieldPath: metadata.name
and now that it's assigned i can access it from anywhere within the container. The following command shows the environment variables for a pod
bash-3.2$ kubectl exec fabric-vp0-awi4s env HOSTNAME=e33e7f4dceb3 MY_POD_NAME=fabric-vp0-awi4s
# using the environment variable in other environment variables
now as i originally wanted to do, i wanted to use that environment variables, so i can manipulate it, where necessary.. and this is achieved by doing "($MYVARIABLENAME)" e.g.
env: - name: MY_POD_NAME valueFrom: fieldRef: fieldPath: metadata.name - name: MY_POD_NAME_2 value: "$(MY_POD_NAME)"
and this yields the desired result
bash-3.2$ kubectl exec fabric-vp0-awi4s env HOSTNAME=e33e7f4dceb3 MY_POD_NAME=fabric-vp0-awi4s MY_POD_NAME_2=fabric-vp0-awi4s
whoop whoop, now this frees me up to do what i was actually wanting to do