Build docker image

[thbkrkr]

This updates the Buildkite pipeline to release a container image that contains the multiple eck-diagnostics tool binaries.

The container image is built and pushed using drivah. The tag is defined using BUILDKITE_TAG if set else BUILDKITE_COMMIT:0:8. The tag is used to set the buildVersion in the tool.

Release when a git tag exists:

# build
> BUILDKITE_TAG=0.0.1 BUILDKITE_COMMIT=azertyuiopqsdfghjk make build-image
drivah build .
Using Docker container engine.
Scanning /Users/krkr/dev/src/github.com/elastic/eck-diagnostics...
Found 1 valid image definitions.
Building build with Docker...
Built docker.elastic.co/eck/diagnostics:0.0.1

# test
> d run --rm docker.elastic.co/eck/diagnostics:0.0.1 get | sh
eck-diagnostics-darwin-arm64 binary copied in local ✅

./eck-diagnostics -v
eck-diagnostics version 0.0.1

Else:

# build
> BUILDKITE_COMMIT=azertyuiopqsdfghjk make build-image
drivah build .
Using Docker container engine.
Scanning /Users/krkr/dev/src/github.com/elastic/eck-diagnostics...
Found 1 valid image definitions.
Building build with Docker...
Built docker.elastic.co/eck/diagnostics:azertyui

# test
> d run --rm docker.elastic.co/eck/diagnostics:azertyui get | sh
eck-diagnostics-darwin-arm64 binary copied in local ✅

./eck-diagnostics -v
eck-diagnostics version azertyui-SNAPSHOT

Two scripts entrypoint.sh and get.sh are used in the image to make it easier to understand how to extract binaries.

Flow in CI: drivah.toml.sh -> Dockerfile -> make build-binary.
Flow in dev: make build-image -> drivah.toml.sh -> Dockerfile -> make build-binary.

Testing:

> IMAGE_NAME=docker.elastic.co/eck-dev/diagnostics make build-image
drivah build .
Using Docker container engine.
Scanning /Users/krkr/dev/src/github.com/elastic/eck-diagnostics...
Found 1 valid image definitions.
Building build with Docker...
Built docker.elastic.co/eck-dev/diagnostics:cdf855f9

Message displayed when the image is called without argument:

> docker run --rm docker.elastic.co/eck-dev/diagnostics:cdf855f9

Copy the eck-diagnostics binary in the current directory from the container image using:

  docker run --rm docker.elastic.co/eck-dev/diagnostics:cdf855f9 get | sh

First call without | sh to check the content of the script:

> docker run --rm docker.elastic.co/eck-dev/diagnostics:cdf855f9 get
#!/bin/sh
#
# Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
# or more contributor license agreements. Licensed under the Elastic License 2.0;
# you may not use this file except in compliance with the Elastic License 2.0.
#

# Script to copy the eck-diagnostics binary  in the current directory from the container image.
# It is intended to be displayed on stdout and piped into sh.

set -eu

os=$(uname | tr '[:upper:]' '[:lower:]')
arch=$(uname -m | sed -e "s|x86_|amd|" -e "s|aarch|arm|")

docker run --rm -v $(pwd):/tmp --entrypoint cp "docker.elastic.co/eck-dev/diagnostics:cdf855f9" \
    -f "/artefacts/eck-diagnostics-${os}-${arch}" /tmp/eck-diagnostics

echo "eck-diagnostics-${os}-${arch} binary copied in local ✅"
echo
echo "./eck-diagnostics -v"
./eck-diagnostics -v

Let's copy the binary:

> docker run --rm docker.elastic.co/eck-dev/diagnostics:cdf855f9 get | sh
eck-diagnostics-darwin-arm64 binary copied in local ✅

./eck-diagnostics -v
eck-diagnostics version cdf855f9-SNAPSHOT

[pebrc]

LGTM, tested on macOS. Awesome shell script wizardry 🪄