IBMZ support for push gateway

[modassarrana89]

I am trying IBMZ support on pushgateway . I do have made changes on dockerignore , makefile. But i have few doubts that need certain clarification

1. In Makefile.common , its trying to use prefix as pwd for storing pushgateway binary . But in dockerfile , its expects it to be placed under ./build/{os}-{arch}/. how is this directory getting created . In Makefile.common , it doesn't create this folder

Makefile.common
...
PREFIX                  ?= $(shell pwd)
...
.PHONY: common-build
common-build: promu
        @echo ">> building binaries"
        $(PROMU) build --prefix $(PREFIX) $(PROMU_BINARIES)

Dockerfile
...
COPY --chown=nobody:nobody .build/${OS}-${ARCH}/pushgateway /bin/pushgateway
...

Makefile.common do invokes dockerfile to build the image for pushgateway , but since it doesn't able to find the .build directory , it is currently failing

To make it work , i am right now moving pushgateway binary stored in my present working directory to .build/linux-s390x/
& then it does work.

Please guide in which step of makefile.common or how does this build directory gets created

3. In circleCI , i can see it test with different arch , but didn't find where its getting passed . I do want it to run for s390x. i have found that circleci do support self hosted s390x runner

[beorn7]

Yeah, I had the same problem, and it's the same for all Prometheus repos (as they all use the same Makefile.common). I think it's some promu magic that manages those directories. (Maybe it's called as promu crossbuild or something? Wildly guessing…) We need somebody with more promu foo.

Since this problem is not specific to the prometheus/pushgateway repo, it might be more likely to reach someone with the right qualifications if posting on the Prometheus developers mailing list.