Custom TBS Stack example

custom_stack.md

Create a custom stack and add to TBS

1. Create a docker file for image:

# Set a common base
FROM alpine as base

# Set required CNB information
ENV CNB_USER_ID=1000
ENV CNB_GROUP_ID=1000
ENV CNB_STACK_ID="io.buildpacks.miclip.stacks.alpine"
LABEL io.buildpacks.stack.id="io.buildpacks.miclip.stacks.alpine"

# Create the user and group
RUN addgroup -S cnb --gid ${CNB_GROUP_ID} &&  adduser -S cnb -G cnb --uid ${CNB_USER_ID}


# ========== ADDED ===========
# Install common packages
RUN apk update && \
  apk add xz ca-certificates   

FROM base as run
USER ${CNB_USER_ID}:${CNB_GROUP_ID}

2. Docker build and push stack image...

docker build . -t gcr.io/some-project/tbs-examples/alpine:1.0.0
docker push gcr.io/some-project/tbs-examples/alpine:1.0.0

3. Add to TBS

kp clusterstack create alpine -b gcr.io/some-project/tbs-examples/alpine:1.0.0 \
  -r gcr.io/some-project/tbs-examples/alpine:1.0.0

4. Verify stack

kp clusterstack list    

alpine     True     io.buildpacks.miclip.stacks.alpine
base       True     io.buildpacks.stacks.bionic
default    True     io.buildpacks.stacks.bionic
full       True     io.buildpacks.stacks.bionic
tiny       True     io.paketo.stacks.tiny

More information: https://buildpacks.io/docs/operator-guide/create-a-stack/