Fix flags typo

[caiocfer]

Found typo when building cAdvisor that was preventing Perf event metrics from being available.
And tags were passed to build as "-tags=-tags=libfpm,netgo,libipmctl".

[google-cla]

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[k8s-ci-robot]

Hi @caiocfer. Thanks for your PR.

I'm waiting for a google member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[iwankgb]

/ok-to-test

I want to see container being build.

[iwankgb]

@caiocfer merge master to your branch, please.

[bobbypage]

This has broke the build (or it was broken before as well now that the typo has been fixed):

#18 [build 12/12] RUN export GO_TAGS="libpfm,netgo";     if [ "$(uname --machine)" = "x86_64" ]; then           export GO_TAGS="$GO_TAGS,libipmctl";     fi;     GO_FLAGS="-tags=$GO_TAGS" ./build/build.sh
#18 1.099 >> building cadvisor
#18 122.5 # github.com/google/cadvisor/perf
#18 122.5 ../perf/collector_libpfm.go:256:34: cannot use _Ctype_ulong(unsafe.Sizeof(unix.PerfEventAttr{})) (constant 128 of type _Ctype_ulong) as _Ctype_uint value in argument to (_Cfunc__CMalloc)
#18 122.5 ../perf/collector_libpfm.go:258:61: cannot use _Ctype_ulong(unsafe.Sizeof(unix.PerfEventAttr{})) (constant 128 of type _Ctype_ulong) as _Ctype_uint value in variable declaration
#18 122.5 ../perf/collector_libpfm.go:272:15: cannot use _Ctype_ulong(unsafe.Sizeof(event)) (constant 24 of type _Ctype_ulong) as _Ctype_uint value in assignment
#18 ERROR: process "/bin/sh -c export GO_TAGS=\"libpfm,netgo\";     if [ \"$(uname --machine)\" = \"x86_64\" ]; then           export GO_TAGS=\"$GO_TAGS,libipmctl\";     fi;     GO_FLAGS=\"-tags=$GO_TAGS\" ./build/build.sh" did not complete successfully: exit code: 1
------
 > [build 12/12] RUN export GO_TAGS="libpfm,netgo";     if [ "$(uname --machine)" = "x86_64" ]; then           export GO_TAGS="$GO_TAGS,libipmctl";     fi;     GO_FLAGS="-tags=$GO_TAGS" ./build/build.sh:
#18 1.099 >> building cadvisor
#18 122.5 # github.com/google/cadvisor/perf
#18 122.5 ../perf/collector_libpfm.go:256:34: cannot use _Ctype_ulong(unsafe.Sizeof(unix.PerfEventAttr{})) (constant 128 of type _Ctype_ulong) as _Ctype_uint value in argument to (_Cfunc__CMalloc)
#18 122.5 ../perf/collector_libpfm.go:258:61: cannot use _Ctype_ulong(unsafe.Sizeof(unix.PerfEventAttr{})) (constant 128 of type _Ctype_ulong) as _Ctype_uint value in variable declaration
#18 122.5 ../perf/collector_libpfm.go:272:15: cannot use _Ctype_ulong(unsafe.Sizeof(event)) (constant 24 of type _Ctype_ulong) as _Ctype_uint value in assignment
------
Dockerfile:43
--------------------
  42 |     # libipmctl only works on x86_64 CPUs.
  43 | >>> RUN export GO_TAGS="libpfm,netgo"; \
  44 | >>>     if [ "$(uname --machine)" = "x86_64" ]; then \
  45 | >>>           export GO_TAGS="$GO_TAGS,libipmctl"; \
  46 | >>>     fi; \
  47 | >>>     GO_FLAGS="-tags=$GO_TAGS" ./build/build.sh
  48 |
--------------------
ERROR: failed to solve: process "/bin/sh -c export GO_TAGS=\"libpfm,netgo\";     if [ \"$(uname --machine)\" = \"x86_64\" ]; then           export GO_TAGS=\"$GO_TAGS,libipmctl\";     fi;     GO_FLAGS=\"-tags=$GO_TAGS\" ./build/build.sh" did not complete successfully: exit code: 1
make: *** [Makefile:69: release] Error 1

[caiocfer]

Are you on a specific branch? Just tried to build and it went fine:

 => [build  7/12] ADD go.mod go.sum ./                                                                                              0.0s  => [build  8/12] RUN go mod download                                                                                              31.8s 
 => [build  9/12] ADD cmd/go.mod cmd/go.sum ./cmd/                                                                                  0.1s 
 => [build 10/12] RUN cd cmd && go mod download                                                                                    40.5s 
 => [build 11/12] ADD . .                                                                                                           0.4s 
 => [build 12/12] RUN export GO_TAGS="libpfm,netgo";     if [ "$(uname --machine)" = "x86_64" ]; then           export GO_TAGS="$  32.0s
 => [stage-1 3/5] COPY --from=build /usr/local/lib/libpfm.so* /usr/local/lib/                                                       0.1s 
 => [stage-1 4/5] COPY --from=build /usr/local/lib/libipmctl.so* /usr/local/lib/                                                    0.1s
 => [stage-1 5/5] COPY --from=build /go/src/github.com/google/cadvisor/_output/cadvisor /usr/bin/cadvisor                           0.2s
 => exporting to image                                                                                                              0.3s
 => => exporting layers                                                                                                             0.2s
 => => writing image sha256:a465c09300cfa83556bde90ce013fe9c544aaa6f4ceccd9548be74a437e9d310                                        0.0s
 => => naming to docker.io/caio/cadvisor:beta