Flux 사용법: flux로 gitops를 적용해보자

Flux

Prerequisites

First, create github personal access token and give all repo-permissions

export GITHUB_TOKEN=<your-token>
export GITHUB_USER=<your-username>

Install flux

brew install fluxcd/tap/flux

(optional) load flux bash completion by add below to profile (~/.bashrc or ~/.zshrc)

. <(flux completion bash)

Instasll flux components

verify cluster satisfies prerequisites

flux check --pre
► checking prerequisites
✔ kubectl 1.19.2 >=1.18.0-0
✔ Kubernetes 1.19.6-eks-49a6c0 >=1.16.0-0
✔ prerequisites checks passed

Run bootstrap command

flux bootstrap github \
  --owner=$GITHUB_USER \
  --repository=<repository_name> \
  --branch=main \
  --path=./clusters/<cluster_name> \
  --personal

If owner is organization, don't use --personal options

flux bootstrap github \
  --owner=<organization> \
  --repository=<repo-name> \
  --branch=<organization default branch> \
  --team=<team1-slug> \
  --team=<team2-slug> \
  --path=./clusters/my-cluster

Clone git repository

git clone https://github.com/$GITHUB_USER/<repo-name>
cd <repo-name>

Add source-code repository to Flux

flux create source git <source-project> \
  --url=https://github.com/<source-git-repository> \
  --branch=main \
  --interval=30s \
  --export > ./clusters/<cluster-name>/<project>-source.yaml

Then <project>-source.yaml manifest created.

Deploy application

can deploy application via kustomize, or helmrelease.

flux create kustomization <project> \
  --source=<project> \
  --path="./kustomize" \
  --prune=true \
  --validation=client \
  --interval=5m \
  --export > ./clusters/<cluster-name>/<project>-kustomization.yaml

Then commit and push Kustomization manifest to repository

git add -A && git commit -m "Add podinfo Kustomization"
git push

If you want to use helm instead of kustomize, use helmrelease

flux create helmrelease <project> \
  --interval=10m \
  --source=GitRepository/<project> \
  --chart=./charts/<project>

flux create helmrelease clustering-faces
--interval=10m
--source=GitRepository/clustering-faces
--chart=./charts/clustering_faces

Watch Flux sync the application

Now you can see synchronization start

$ watch flux get kustomizations

After the synchronization finishes you can see application deployed in cluster.

$ kubectl -n default get deployments,services