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flux + kubernetes + gitops + Kustomization

news 2026/4/15 16:31:58

# 1. 安装依赖
yum install -y git

# 2. 设置代理（根据你的环境）
export http_proxy=http://192.168.3.77:20171
export https_proxy=http://192.168.3.77:20171
export NO_PROXY=*.baidu.com,10.0.0.0/8,.cluster.local,192.168.3.0/24

# 3. 安装 flux CLI
curl -s https://fluxcd.io/install.sh | bash
source ~/.bashrc

# 4. 初始化 Git 仓库
mkdir -p /root/gitops-repo
cd /root/gitops-repo/
git init
git config --global user.name "user"
git config --global user.email "user@example.com"

# 5. 安装 Flux 到 Kubernetes
flux install

# 6. 创建目录结构
mkdir -p base overlays/dev

# 7. 编写 base 资源
cat > base/deployment.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
name: myapp
spec:
replicas: 1
selector:
matchLabels:
app: myapp
template:
metadata:
labels:
app: myapp
spec:
containers:
- name: myapp
image: nginx:alpine
ports:
- containerPort: 80
EOF

cat > base/service.yaml << EOF
apiVersion: v1
kind: Service
metadata:
name: myapp
spec:
type: ClusterIP
ports:
- port: 80
selector:
app: myapp
EOF

cat > base/kustomization.yaml << EOF
apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources: //这里必须写resources "./overlays/dev" 不用写是应为他是监听主目录是唯一的例外
- deployment.yaml
- service.yaml
EOF

# 8. 编写 overlays/dev
cat > overlays/dev/kustomization.yaml << EOF
apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources:
- ../../base
replicas: //只会修改被resources引入的yaml
- name: myapp
count: 2
images:
- name: nginx
newTag: 1.25-alpine
EOF

# 9. 提交到 Git
git add .
git commit -m "init gitops"

# 10. 配置 SSH 密钥（本地Git认证）
ssh-keygen -t rsa -N "" -f /root/.ssh/id_rsa
cat /root/.ssh/id_rsa.pub > /root/.ssh/authorized_keys
chmod 600 /root/.ssh/authorized_keys
ssh -o StrictHostKeyChecking=no root@192.168.3.243 "echo OK"

# 11. 创建 Git 源（Flux 拉取 Git）
flux create source git gitops-repo \
--url=ssh://root@192.168.3.243/root/gitops-repo \
--branch=master \
--interval=30s \
--private-key-file=/root/.ssh/id_rsa

# 12. 授予 Flux 集群权限
kubectl create clusterrolebinding flux-cluster-admin \
--clusterrole=cluster-admin \
--serviceaccount=flux-system:flux-system

# 13. 加入测试资源（带 namespace）
cat > overlays/dev/nginx-test.yaml << EOF
apiVersion: v1
kind: Pod
metadata:
namespace: default
name: nginx-test
spec:
containers:
- name: nginx
image: nginx:alpine
EOF

git add .
git commit -m "fix: add namespace"

# 14. 创建 Kustomization（自动部署）
flux create kustomization gitops-dev \
--source=gitops-repo \
--path="./overlays/dev" \
--prune=true \
--interval=30s \
--target-namespace=default

# 15. 查看最终状态
flux get all
kubectl get po

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