use latest release of protobuf

[nlopezgi]

fixes #240

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chrislovecnm, nlopezgi, smukherj1

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[chrislovecnm]

/lgtm

[nlopezgi]

/retest

[meteorcloudy]

https://buildkite.com/bazel/rules-k8s-k8s/builds/426#e73ed2f0-2a3b-4163-ada9-f4c59292ff12

ERROR: /Users/buildkite/builds/buildkite-imacpro-9/bazel/rules-k8s-k8s/examples/hellogrpc/java/server/BUILD:20:1: no such package '@java_image_base//image': Pull command failed: F1213 10:36:50.939079   86586 __main__.py:127] Error pulling and saving image gcr.io/distroless/java@sha256:84740ded6cbeebaa89c9b19aed3754d464586592b561e5494be4192ac0b3a8f5: [Errno 54] Connection reset by peer
--
  | (/usr/bin/python /private/var/tmp/_bazel_buildkite/73fdb406995ac6797cdaa636ec7f1539/external/puller/file/downloaded --directory /private/var/tmp/_bazel_buildkite/73fdb406995ac6797cdaa636ec7f1539/external/java_image_base/image --name gcr.io/distroless/java@sha256:84740ded6cbeebaa89c9b19aed3754d464586592b561e5494be4192ac0b3a8f5) and referenced by '//examples/hellogrpc/java/server:server'
  | ERROR: /Users/buildkite/builds/buildkite-imacpro-9/bazel/rules-k8s-k8s/examples/hellohttp/java/BUILD:20:1: no such package '@jetty_image_base//image': Pull command failed: Timed out (/usr/bin/python /private/var/tmp/_bazel_buildkite/73fdb406995ac6797cdaa636ec7f1539/external/puller/file/downloaded --directory /private/var/tmp/_bazel_buildkite/73fdb406995ac6797cdaa636ec7f1539/external/jetty_image_base/image --name gcr.io/distroless/java/jetty@sha256:c5bba383c4a37fbb316d1627af172703aa10ed39f9652de56c6a5e87bacc2d66) and referenced by '//examples/hellohttp/java:server'

rules_k8 is failing on mac, is this a valid failure or just a flake?

[nlopezgi]

mac has been super flaky for us pulling images (both this repo and rules_docker). I sent an email some days ago internally asking for advice but got no response yet. Can we turn off just mac checks for now in Bazel Ci while I figure out out?

[meteorcloudy]

In that case, I think it's fine to turn off mac for rules_docker and rules_k8s for now.

[nlopezgi]

thanks!

[chrislovecnm]

@nlopezgi have we filed a bug with buildkite?

[meteorcloudy]

To disable mac, you can just comment out the mac config in this file: https://github.com/bazelbuild/rules_k8s/blob/master/.bazelci/presubmit.yml#L13