More verbose Prometheus build (errors) with promu

[Jasper Siepkes]

Hi!

I'm trying to build Prometheus on Illumos (Solaris) I won't bore you with my platform specific porting issues ;-) but I would appreciate any help you folks can offer with promu. I can't seem to get the actual build error message.

When building with "make build" the build eventually fails on "building binaries". I suspect due to some platform specific things I need to fix. However I can't seem to get a decent error message out of the build. It fails with:

----8<--------------------------

>> building binaries

GO111MODULE=on CGO_LDFLAGS="-lsocket -lsendfile" /root/go/bin/promu build --prefix /root/go/src/github.com/prometheus/prometheus 

 >   prometheus

# github.com/docker/docker/client

vendor/github.com/docker/docker/client/client.go:120:35: undefined: DefaultDockerHost

vendor/github.com/docker/docker/client/client.go:125:12: undefined: DefaultDockerHost

vendor/github.com/docker/docker/client/client.go:128:12: undefined: defaultProto

vendor/github.com/docker/docker/client/client.go:129:12: undefined: defaultAddr

!! command failed: build -o /root/go/src/github.com/prometheus/prometheus/prometheus -ldflags -X github.com/prometheus/common/version.Version=2.23.0 -X github.com/prometheus/common/version.Revision=26d89b4b0776fe4cd5a3656dfa520f119a375273 -X github.com/prometheus/common/version.Branch=joyent/2.23 -X github.com/prometheus/common/version.BuildUser=root@build-2 -X github.com/prometheus/common/version.BuildDate=20210109-09:05:46  -mod=vendor -a -tags netgo,builtinassets github.com/prometheus/prometheus/cmd/prometheus: exit status 2

make: *** [Makefile.common:229: common-build] Error 1

----8<--------------------------

I managed to get a bit more information by attempting this build step manually with the "promu -v build" command. However that only yields a backtrace which (I think) just shows a part of the promu execution and not the actual build failure:

----8<--------------------------

!! exit status 2

command failed: build -o prometheus -ldflags -X github.com/prometheus/common/version.Version=2.23.0 -X github.com/prometheus/common/version.Revision=26d89b4b0776fe4cd5a3656dfa520f119a375273 -X github.com/prometheus/common/version.Branch=joyent/2.23 -X github.com/prometheus/common/version.BuildUser=root@build-2 -X github.com/prometheus/common/version.BuildDate=20210108-21:58:18  -mod=vendor -a -tags netgo,builtinassets github.com/prometheus/prometheus/cmd/prometheus

github.com/prometheus/promu/cmd.buildBinary

        /root/go/src/github.com/prometheus/promu/cmd/build.go:86

github.com/prometheus/promu/cmd.buildAll

        /root/go/src/github.com/prometheus/promu/cmd/build.go:92

github.com/prometheus/promu/cmd.runBuild

        /root/go/src/github.com/prometheus/promu/cmd/build.go:130

github.com/prometheus/promu/cmd.Execute

        /root/go/src/github.com/prometheus/promu/cmd/promu.go:125

main.main

        /root/go/src/github.com/prometheus/promu/main.go:20

runtime.main

        /opt/local/go115/src/runtime/proc.go:204

runtime.goexit

        /opt/local/go115/src/runtime/asm_amd64.s:1374

----8<--------------------------

Am I missing something obvious here?

Kind regards,

Jasper

[David Leadbeater]

I think the error is hiding in there:

vendor/github.com/docker/docker/client/client.go:120:35: undefined:
DefaultDockerHost

(You can probably just do: go build ./cmd/prometheus to get that,
rather than needing to use the full build system.)

It looks like https://github.com/prometheus/prometheus/blob/v2.23.0/vendor/github.com/docker/docker/client/client_unix.go
was missing illumos -- although a dependency update for 2.24 seems to
have added it, so try 2.24?

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[Jasper Siepkes]

Thanks for the pointer!

I had dismissed those as warnings since there was about a minute between those messages and the actual failing of the build. With the expected platform specific changes 2.24 builds fine!

Kind regards,

Jasper