contrib: Add devcontainer configuration

[sayboras]

Description

This is to provide the quick way for new contributors to bootstrap
development environment with devcontainer, which is
widely used in vscode as well as github codespaces. The
docker image is completely re-used from cilium builder image.

Minimum set of features (e.g. docker-in-docker) is enabled by default.
While enabling more features is handy, it will increase the bootstrap
time. Hence, only docker is enabled as required by Makefile targets (e.g
helm-docs).

Signed-off-by: Tam Mach tam.mach@cilium.io

Testing

Please find below the snippet of local devcontainer with vscode

root@1a0f5e8517c5:/go/src/github.com/cilium/cilium# make dev-doctor
go version 2>/dev/null || ( echo "go not found, see https://golang.org/doc/install" ; false )
go version go1.19.3 linux/amd64
go run ./tools/dev-doctor
RESULT    CHECK           MESSAGE
ok        os/arch         linux/amd64
ok        uname           Linux 1a0f5e8517c5 6.0.12-200.fc36.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Dec 8 17:15:53 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
ok        root-dir        found /go/src/github.com/cilium/cilium
ok        make            found /usr/bin/make, version 4.3
ok        go              found /usr/local/go/bin/go, version 1.19.3
warning   tparse          tparse not found in $PATH
ok        clang           found /usr/local/bin/clang, version 10.0.0
ok        docker-server   found /usr/bin/docker, version 20.10.22
ok        docker-client   found /usr/bin/docker, version 20.10.22
ok        docker-buildx   found /usr/bin/docker, version 0.9.1
warning   ginkgo          ginkgo not found in $PATH
warning   golangci-lint   golangci-lint not found in $PATH
ok        docker          found /usr/bin/docker, version 20.10.22
warning   helm            helm not found in $PATH
ok        llc             found /usr/local/bin/llc, version 10.0.0
info      vagrant         vagrant not found in $PATH
info      virtualbox      virtualbox not found in $PATH
info      vboxheadless    vboxheadless not found in $PATH
warning   pip3            pip3 not found in $PATH
warning   cfssl           cfssl not found in $PATH
warning   cfssljson       cfssljson not found in $PATH
ok        docker-group    user root in docker group

CHECK           HINT
tparse          Run "go install github.com/mfridman/tparse@latest"
ginkgo          Run "go install github.com/onsi/ginkgo/ginkgo@latest".
golangci-lint   See https://golangci-lint.run/usage/install/#local-installation.
vboxheadless    run "VBoxHeadless --help" to diagnose why vboxheadless failed to execute
cfssl           See https://github.com/cloudflare/cfssl#installation.
cfssljson       See https://github.com/cloudflare/cfssl#installation.

See https://docs.cilium.io/en/latest/contributing/development/dev_setup/.
root@1a0f5e8517c5:/go/src/github.com/cilium/cilium# 

[sayboras]

The changes here are mainly related to local development, full CI is not required.

[joestringer]

Just one nit, otherwise LGTM thanks!

[sayboras]

Couple of forced push to rebase and update {builder,runtime} images.

[sayboras]

/test

Job 'Cilium-PR-K8s-1.26-kernel-net-next' failed:

Click to show.

Test Name

K8sDatapathServicesTest Checks N/S loadbalancing Tests with XDP, vxlan tunnel, SNAT and Random

Failure Output

FAIL: Can not connect to service "tftp://[fd04::11]:31231/hello" from outside cluster (2/10)

If it is a flake and a GitHub issue doesn't already exist to track it, comment /mlh new-flake Cilium-PR-K8s-1.26-kernel-net-next so I can create one.

[sayboras]

Travis failure is due to the below issue, which will be fixed in #23329

--- FAIL: TestGetIdentity (0.61s)
                                 
    --- FAIL: TestGetIdentity/Duplicated_identity (0.03s)

[sayboras]

Reviews are in, all jobs are passed except:

• Travis failure hits sort identities by id/name to avoid random results #23329
• test-1.26-net-next hits existing flake CI: K8sDatapathServicesTest Checks N/S loadbalancing Tests with XDP, vxlan tunnel, SNAT and Random #22579.

Mark this ready to merge so that this PR will show up for tophat.