Dev tools

Few tools that accelerate and simplify the development, and their impact on projects.

Ko

The ko-build.sh script will use 'go build' and push the result as a layer, no docker involved. Best used with Skaffold.

Expected env variables:

IMAGE - including tag. Set automatically by skaffold

Generally it works great if you have a base image with all 'stable' components and you add a single go binary. Ko can bundle files from .../kodata/ dir, and make it available as $KO_DATA_PATH, including symlinks. The example in readme is to include .git/HEAD

Ko creates reproductible builds - date is set.

For local repository or in-cluster with forwarded port - it is faster, but requires keeping the port forwards open.

export KO_DOCKER_REPO=localhost:5000 ko.local == use local docker daemon kind.local == use local kind

Can also cross-build, with "--platform=linux/amd64,linux/arm64"

Skaffold

It will also check if any file has changed, and in 'dev' mode watch for changed files and re-deploy automatically. It can also start a debugger and forward ports.

Without certificates and for faster time: deploy in-cluster registry, forward registry port to 5001. In-cluster registry runs on localhost:5001

use shell script to build - most flexible, easy to plug in ko or other targets
schema rewrite/refactoring removes comments.

apiVersion: skaffold/v2beta14
kind: Config
metadata:
  name:    istiod
...


build:
  insecureRegistries:
    - localhost:5001

...

    # Building real istiod
    # Due to KO, which uses the image == last component of the go package
    - image: pilot-discovery
      context: /ws/istio-stable/src/istio.io/istio
      custom:
        buildCommand: /ws/dmesh-src/wpgate/bin/build-istiod.sh
        dependencies:
          paths:
            - "pilot/**"

      context: .
      custom:
        buildCommand: ../../bin/build-istiod.sh
        dependencies:
          paths:
            - "../../../istio/pilot/**"

deploy:
  kubectl:
    manifests:
      - ns.yaml
      - ../helm/istiod/charts/*.yaml

Env variables in the build command:

PUSH_IMAGE=true
IMAGE=gcr.io/dmeshgate/istiod:t-2021-05-15_11-23
IMAGE_REPO=gcr.io/dmeshgate/istiod
IMAGE_TAG=t-2021-05-15_11-23
SKAFFOLD_UPDATE_CHECK=false

Okteto

Okteto is a remarcable developmet tool, with a model worth emulating in standalone charts to build 'debuggable' images.

How it works:

start with a base 'tools' image, including all the build tools - similar with the one used to build istio.
add a 'sshd' binary
add a 'syncthing' binary
generate a sshd config - using the public key ~/.okteto/... as authorized

2.6 KiB Raw Blame History

Dev tools

Ko

Skaffold

Okteto

2.6 KiB

Raw Blame History