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#### openIM k8s部署文档
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### 1. 修改配置文件
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在Open-IM-SERVER根目录下修改config/config.yaml配置文件, 请确保以下修改的所有地址必须保证k8s pod能够访问
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1. 修改ETCD配置为自己的ETCD ip地址, 最好和k8s本身使用的ETCD分开
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2. 修改MySQL配置
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3. 修改Mongo配置
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4. 修改Redis配置
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5. 修改Kafka配置
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6. 将rpcRegisterIP修改为空, 此地址为每个rpc注册到ETCD的地址, 置空每个rpc将会将pod地址注册到ETCD, 才能正确rpc请求(重要)
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7. 如果使用minio作为对象存储, 还需要修改minio的地址
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8. 其他如果使用离线推送,需要修改push离线推送配置
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9. 修改demo中的imAPIURL字段为openIM api的ingress或者service地址, 需要让demo的pod能正确请求到(重要)
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10. 其他非必须配置修改, 如短信,推送等
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### 2. 项目根目录创建im configMap到k8s openim namespace
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1. 为open-IM项目创建单独命名空间
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```
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kubectl create namespace openim
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```
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2. 在项目根目录通过config/config.yaml
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```
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kubectl -n openim create configmap config --from-file=config/config.yaml
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kubectl -n openim create configmap usualConfig --from-file=config/usualConfig.yaml
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```
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查看configmap
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```
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kubectl -n openim get configmap
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```
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### 3(可选). 修改每个deployment.yml
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每个rpc的deployment在Open-IM-SERVER根目录deploy_k8s下
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给需要调度的node打上标签
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```
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kubectl get nodes
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kubectl label node k8s-node1 role=openIMworker
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```
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在deployment的spec.template.spec加上
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```
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nodeSelector:
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role: openIMworker
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```
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创建资源清单时添加上nodeSelector属性对应即可,
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修改每种服务数量，建议至少每种2个rpc。
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如果修改了config/config.yaml某些配置比如端口，同时需要修改对应deployment端口和ingress端口
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### 4. 修改ingress.yaml配置文件
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1. 需要安装ingress controller, 这里使用的是ingress-nginx, 使用其他类型的ingress controller需要更改ingress.class, 将host改为自己部署服务的host
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### 5. 执行./kubectl_start.sh脚本
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1. 脚本给予可执行权限
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```
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chmod +x ./kubectl_start.sh ./kubectl_stop.sh
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```
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2. 启动k8s service和deployment
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```
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./kubectl_start.sh
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```
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3. 启动k8s ingress
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```
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kubectl -n openim apply -f ingress.yaml
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```
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kubectl 启动所有deployment, services, ingress
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### 6. 查看k8s deployment service ingress状态
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```
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kubectl -n openim get services
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kubectl -n openim get deployment
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kubectl -n openim get ingress
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kubectl -n openim get pods
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```
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检测服务可达
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```
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telnet msg-gateway.openim.xxx.com {{your_ingress_port}}
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telnet sdk-server.openim.xxx.com {{your_ingress_port}}
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telnet api.openim.xxx.com {{your_ingress_port}}
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telnet cms-api.openim.xxx.com {{your_ingress_port}}
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telnet demo.openim.xxx.com {{your_ingress_port}}
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```
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#### openIM k8s更新
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1. 暂存配置文件，拉取代码
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```
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git stash push config/config.yaml
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git pull
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```
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2. 合并配置文件, 解决冲突
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```
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git stash pop
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```
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3. 重新生成configmap
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```
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kubectl -n openim create configmap config --from-file=config/config.yaml
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```
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4.修改所有deployment文件的spec.template.spec.image 改为新版本后在/deploy_k8s下重新执行
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```
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./kubectl_stop.sh
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./kubectl_start.sh
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```
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