Unable to build a Go function with s2i directly on the cluster

[jrangelramos]

On cluster builds does not work for go function using s2i builder for either http and cloudevents default template.

Steps to reproduce

$ func create -l go /tmp/somefunc
$ func deploy -b s2i -p /tmp/somefunc --remote

Tekton task build and deploy logs

$ tkn pr logs
...
[build : build] STEP 1/8: FROM registry.access.redhat.com/ubi8/go-toolset:latest
[build : build] Trying to pull registry.access.redhat.com/ubi8/go-toolset:latest...
[build : build] Getting image source signatures
[build : build] Checking if image destination supports signatures
[build : build] Copying blob sha256:8694db102e5bd27fa30106f87d5a0f0c5ccccac0e5cc38ba56080d7559377096
[build : build] Copying blob sha256:7027f4e4058bde8aaa497e47562e962c293039ba16f5fbfd07ff43a0d1dbd5a2
[build : build] Copying blob sha256:b6a366ac05e5458bcf8b40dd8802b77ffbbe792e074a976b85ea818a92607e05
[build : build] Copying blob sha256:be575238ea985ef824635fbeaf7b33eaed98ef6ba1db1822ac0714f509304d17
[build : build] Copying config sha256:ac107e10470d56a8b99dbf9a405b63d0ca69af209e45c5fa426ec1b903d9dd93
[build : build] Writing manifest to image destination
[build : build] Storing signatures
[build : build] STEP 2/8: LABEL "io.openshift.s2i.build.image"="registry.access.redhat.com/ubi8/go-toolset:latest"       "io.openshift.s2i.build.source-location"="."
[build : build] --> 032d3d3a27a4
[build : build] STEP 3/8: USER root
[build : build] --> 4859baaa087a
[build : build] STEP 4/8: COPY upload/src /tmp/src
[build : build] --> 9005b977e66e
[build : build] STEP 5/8: RUN chown -R 1001:0 /tmp/src
[build : build] --> 7d829a5fe906
[build : build] STEP 6/8: USER 1001
[build : build] --> 56cb1bc8e4b6
[build : build] STEP 7/8: RUN /usr/libexec/s2i/assemble
[build : build] /tmp/src ~
[build : build] go: downloading github.com/cloudevents/sdk-go/v2 v2.5.0
[build : build] go: downloading github.com/json-iterator/go v1.1.10
[build : build] go: downloading github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421
[build : build] go: downloading github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742
[build : build] ~
[build : build] --> 523c6675a5be
[build : build] STEP 8/8: CMD /usr/libexec/s2i/run
[build : build] COMMIT image-registry.openshift-image-registry.svc:5000/knfunc-oncluster-test-3qh50k/goocb:latest
[build : build] --> e8052e243a7b
[build : build] Successfully tagged image-registry.openshift-image-registry.svc:5000/knfunc-oncluster-test-3qh50k/goocb:latest
[build : build] e8052e243a7b5afdf9efc3c8e8f8d05404a722792980a533e35e55d7923d149f
[build : build] Getting image source signatures
[build : build] Copying blob sha256:d2496918743b76651915b83422da63a7a7ba6f41c64970aeebad43e7421cf8fa
[build : build] Copying blob sha256:41fdab9a4e32b1a427aef2d9537ed8c34cae55ba76471c1a3b1e2a31819dacd6
[build : build] Copying blob sha256:5141d650520148139290774c3bf838490494cd29e02865689cb1615210cfaad1
[build : build] Copying blob sha256:09057cb70b4cc786df3b5a67120db8120d9ae445772ef020c90ad01af2b44032
[build : build] Copying blob sha256:fbfe83c51065a0d0b1e815715d4eec8e487f4978e54991e5d0ba8379d67ec654
[build : build] Copying blob sha256:4e29796b4201fba751b920fb5db529ac2be5dc80ea177b53d7c6e89a3cdc0e03
[build : build] Copying blob sha256:648d96915aaa6067011496eaf1d49f8ed260dd34d49c2a7079adba8f600ab2e7
[build : build] Copying config sha256:e8052e243a7b5afdf9efc3c8e8f8d05404a722792980a533e35e55d7923d149f
[build : build] Writing manifest to image destination
[build : build] sha256:ce4487700c579e0c837a80d41af08a9367bc4c19aae61c4e075b033d8b3d804d

[deploy : func-deploy] Waiting for Knative Service to become ready
[deploy : func-deploy] /usr/libexec/s2i/run: line 5: /opt/app-root/gobinary: Permission denied
[deploy : func-deploy] /usr/libexec/s2i/run: line 5: /opt/app-root/gobinary: Permission denied
[deploy : func-deploy] /usr/libexec/s2i/run: line 5: /opt/app-root/gobinary: Permission denied
[deploy : func-deploy] /usr/libexec/s2i/run: line 5: /opt/app-root/gobinary: Permission denied

[jrangelramos]

/cc @lkingland @matejvasek