exec：“ gcc”：在$ PATH中找不到可执行文件

Question

I'm having an issue where an App Engine project will no longer build remotely (via gcloud app deploy)

This has started out of the blue, with no code changes at this end. Not sure if relevant, but it's a go 1.9 project deploying to the App Engine Flex environment.

I'm not sure how to test this in the same environment as the build, since the error is coming from Google's Container Registry

Here is the log from the Container Registry console

starting build "73f85b4d-7370-41bd-bbb2-bcf42fc38873" 

FETCHSOURCE 
Fetching storage object: gs://staging.[project].appspot.com/us.gcr.io/[project]/appengine/default.1ed3c690ead06f27aa651a30fab342611:latest#1531698266413753 
Copying gs://staging.[project].appspot.com/us.gcr.io/[project]/appengine/default.1ed3c690ead49f731806f27aa630fab342611:latest#1531698266413753... 
Operation completed over 1 objects/1.7 MiB.  

BUILD 
Starting Step #0 
Step #0: Pulling image: gcr.io/gcp-runtimes/go1-builder@sha256:c62ac3fbec31ddec70601d6c5b44d07063bcff6a823bdcf5e0bbaa9d3799d1db 
Step #0: sha256:c62ac3fbec31ddec70601d6c5b44d07063bcff6a823bdcf5e0bbaa9d3799d1db: Pulling from gcp-runtimes/go1-builder 
Step #0: Digest: sha256:c62ac3fbec31ddec70601d6c5b44d07063bcff6a823bdcf5e0bbaa9d3799d1db 
Step #0: Status: Downloaded newer image for gcr.io/gcp-runtimes/go1-builder@sha256:c62ac3fbec31ddec70601d6c5b44d07063bcff6a823bdcf5e0bbaa9d3799d1db 
Step #0: exec: "gcc": executable file not found in $PATH Finished 
Step #0 ERROR ERROR: build step 0 "gcr.io/gcp-runtimes/go1-builder@sha256:c62ac3fbec31ddec70601d6c5b44d07063bcff6a823bdcf5e0bbaa9d3799d1db" failed: exit status 2

Answer 1

It looks like you are using container gcr.io/gcp-runtimes/go1-builder as your build step. Looking at the source in GitHub, I see that there have been no updates since ~late June. I see in the Dockerfile that the base image in the FROM directive is gcr.io/google-appengine/debian9:latest, and a look at that image reveals no gcc installed. I see no step in the Dockerfile installing gcc, and looking at your build step image confirms that it isn't there:

~$ docker run --rm -t -i --entrypoint /bin/bash gcr.io/gcp-runtimes/go1-builder@sha256:c62ac3fbec31ddec70601d6c5b44d07063bcff6a823bdcf5e0bbaa9d3799d1db -- which gcc
Unable to find image 'gcr.io/gcp-runtimes/go1-builder@sha256:c62ac3fbec31ddec70601d6c5b44d07063bcff6a823bdcf5e0bbaa9d3799d1db' locally
sha256:c62ac3fbec31ddec70601d6c5b44d07063bcff6a823bdcf5e0bbaa9d3799d1db: Pulling from gcp-runtimes/go1-builder
e154cec6816f: Pull complete 
<pulls elided>
Digest: sha256:c62ac3fbec31ddec70601d6c5b44d07063bcff6a823bdcf5e0bbaa9d3799d1db
Status: Downloaded newer image for gcr.io/gcp-runtimes/go1-builder@sha256:c62ac3fbec31ddec70601d6c5b44d07063bcff6a823bdcf5e0bbaa9d3799d1db
~$ 

Perhaps an earlier version of the base debian9 image had it installed, you could dig into history to look. But it looks like there is no recent change to the go1-builder image to remove gcc.

If you need gcc, you can always separate building your app from deploying it. Build with your own cloudbuild.yaml via gcloud container builds submit and then deploy the built container using gcloud app deploy --image-url=... With full control over the build, you can always based on the go-builder image and install additional tooling you need like gcc on top of that before using Docker to build your final app container.