云原生之旅 - 14）遵循 GitOps 实践的好工具 ArgoCD
前言Argo CD 是一款基于 kubernetes 的声明式的Gitops 持续部署工具。
[*]应用程序定义、配置和环境都是声明式的，并受版本控制
[*]应用程序部署和生命周期管理都是自动化的、可审计的，并且易于理解。
本文使用 ArgoCD + Kustomize 实现自动化部署Kubernetes工作流。
## 本文同步发表于知乎 https://zhuanlan.zhihu.com/p/584881969
安装 Argo CD
kubectl create namespace argocd
kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml
命令行工具 Argo CD CLI
MacOS 安装brew install argocd
访问 Argo CD
Option 1: Service Type Load Balancer
You can change Service Type to Load Balancer kubectl patch svc argocd-server -n argocd -p '{"spec": {"type": "LoadBalancer"}}'
Option 2: (Recommend) 使用 Gateway
1. 使用 Ingress-nginx 可参考 云原生之旅 - 8）云原生时代的网关 Ingress Nginxhttps://images.cnblogs.com/OutliningIndicators/ContractedBlock.gifhttps://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif# Ingress-Nginx installed first
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
annotations:
ingress.kubernetes.io/force-ssl-redirect: "true"
ingress.kubernetes.io/ssl-redirect: "true"
kubernetes.io/ingress.class: nginx
# If you encounter a redirect loop or are getting a 307 response code
# then you need to force the nginx ingress to connect to the backend using HTTPS.
nginx.ingress.kubernetes.io/backend-protocol: "HTTPS" # argocd backend using HTTPS
# face to internet, recommend update to restrict access
nginx.ingress.kubernetes.io/whitelist-source-range: |
0.0.0.0/0
name: ingress-argocd
namespace: dmz
spec:
rules:
- host: argocd.wadexu.cloud
http:
paths:
- backend:
service:
name: argocd-ext-svc
port:
number: 8080
path: /
pathType: Prefix
tls:
- hosts:
- argocd.wadexu.cloud
secretName: tls-secret
---
# add externalName type svc in dmz namespace, so that Ingress (in dmz) can point to this svc in argocd ns
apiVersion: v1
kind: Service
metadata:
name:argocd-ext-svc
namespace: dmz
spec:
type: ExternalName
externalName: argocd-server.argocd.svc.cluster.local
ports:
- name: http
port: 8080
targetPort: 80
protocol: TCP
selector:
app.kubernetes.io/name: argocd-serverargocd_ingress.yaml2. 使用 Emissary 参考 云原生之旅 - 9）云原生时代网关的后起之秀Envoy Proxy 和基于Envoy 的 Emissary Ingress
Option 3: 端口转发
运行下面命令然后本地浏览器访问 `https://localhost:8080`kubectl port-forward svc/argocd-server -n argocd 8080:443
The initial password for the admin account is auto-generated and stored as clear text in the field password in a secret named argocd-initial-admin-secret in your Argo CD installation namespace. You can simply retrieve this password using kubectlkubectl -n argocd get secret argocd-initial-admin-secret -o jsonpath="{.data.password}" | base64 -d; echo域名取决于你在gateway里面的配置，Login now
argocd login https://argocd.wadexu.cloud如果是端口转发，参考如下命令
kubectl port-forward svc/argocd-server -n argocd 8080:443
argocd login https://localhost:8080 --username admin --password <repalce_me> 更改密码
argocd account update-password
注册 external Cluster
(Optional) 这一步是为了deploy到到外部的cluster，如果仅仅deploy到和Argo CD一起的cluster 则使用 https://kubernetes.default.svc# list context
kubectx
argocd cluster add xxx_context
创建 Application
Creating Apps Via CLI
kubectl config set-context --current --namespace=argocd
argocd app create my-app --repo https://github.com/wadexu007/learning_by_doing.git --path Kustomize/demo-manifests/services/demo-app/dev --dest-server https://kubernetes.default.svc --dest-namespace demo
Sync (Deploy) Application
Syncing via CLI
argocd app get my-app
argocd app sync my-app
通过UI 创建和Sync Application 也非常简单。详见官方文档。
## 本文同步发表于知乎 https://zhuanlan.zhihu.com/p/584881969
更多
Argo CD supports several different ways in which Kubernetes manifests can be defined:
[*]Kustomize applications (我的例子）
[*]Helm charts
[*]A directory of YAML/JSON/Jsonnet manifests, including Jsonnet.
[*]Any custom config management tool configured as a config management plugin
感谢阅读，如果您觉得本文的内容对您的学习有所帮助，您可以打赏和推荐，您的鼓励是我创作的动力。
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