Buildpack build failed because failed to exec as user 1000:1000: operation not permitted at restore step

[zhangtbj]

When we use the latest buildpack builder image version v0.1.7 (https://hub.docker.com/layers/paketobuildpacks/builder/0.1.7-full/images/sha256-fc7e851a66e650d29412d5634239d0f1d52f61de873af4ec8dd815d4d53fd443?context=explore) to build our source code, it failed at restore step and reported below error:

{"level":"info","ts":1603344888.9389212,"caller":"git/git.go:180","msg":"Successfully initialized and updated submodules in path /workspace/source"}
paketo-buildpacks/node-engine 0.1.2
paketo-buildpacks/npm-install 0.2.1
paketo-buildpacks/npm-start   0.0.2
ERROR: failed to exec as user 1000:1000: operation not permitted
2020/10/22 05:34:58 Skipping step because a previous step failed

This error happens when paketo updates lifecyle version to 0.9.2, 0.9.1 version doesn't have this issue.

And this error only happens on Code Engine env. On a normal cluster (doesn't have tekton-restricted-psp pod security policy), it also doesn't have this issue.

So maybe this is a pod security policy issue, but let us investigate it first!

Also ask for paketo guys' help in slack channel: https://paketobuildpacks.slack.com/archives/CULAS8ACD/p1603353770049600

[SaschaSchwarze0]

This is resolved by @xiujuan95's PR.