Kubernetes(k8s) 应用部署

部署是一种将镜像转换为容器，然后将这些镜像分配到 Kubernetes 集群中的 pod 的方法。 这也有助于设置应用程序集群，包括服务、pod、复制控制器和副本集的部署。 集群可以设置为部署在 pod 上的应用程序可以相互通信。

在此设置中，我们可以在一个应用程序之上设置负载均衡器，将流量转移到一组 Pod，然后它们与后端 Pod 通信。 Pod 之间的通信是通过 Kubernetes 中内置的服务对象进行的。

Nginx 负载均衡 Yaml 文件

apiVersion: v1
kind: Service
metadata:
name: oppv-dev-nginx
labels:
k8s-app: omni-ppv-api
spec:
type: NodePort
ports:
- port: 8080
nodePort: 31999
name: omninginx
selector:
k8s-app: appname
component: nginx
env: dev

Nginx 复制控制器 Yaml

apiVersion: v1
kind: ReplicationController
metadata:
name: appname
spec:
replicas: replica_count
template:
metadata:
name: appname
labels:
k8s-app: appname
component: nginx
env: env_name
spec:
nodeSelector:
resource-group: oppv
containers:
- name: appname
image: IMAGE_TEMPLATE
imagePullPolicy: Always
ports:
- containerPort: 8080
resources:
requests:
memory: "request_mem"
cpu: "request_cpu"
limits:
memory: "limit_mem"
cpu: "limit_cpu"
env:
- name: BACKEND_HOST
value: oppv-env_name-node:3000

前端服务 Yaml 文件

apiVersion: v1
kind: Service
metadata:
name: appname
labels:
k8s-app: appname
spec:
type: NodePort
ports:
- name: http
port: 3000
protocol: TCP
targetPort: 3000
selector:
k8s-app: appname
component: nodejs
env: dev

前端复制控制器 Yaml 文件

apiVersion: v1
kind: ReplicationController
metadata:
name: Frontend
spec:
replicas: 3
template:
metadata:
name: frontend
labels:
k8s-app: Frontend
component: nodejs
env: Dev
spec:
nodeSelector:
resource-group: oppv
containers:
- name: appname
image: IMAGE_TEMPLATE
imagePullPolicy: Always
ports:
- containerPort: 3000
resources:
requests:
memory: "request_mem"
cpu: "limit_cpu"
limits:
memory: "limit_mem"
cpu: "limit_cpu"
env:
- name: ENV
valueFrom:
configMapKeyRef:
name: appname
key: config-env

后端服务 Yaml 文件

apiVersion: v1
kind: Service
metadata:
name: backend
labels:
k8s-app: backend
spec:
type: NodePort
ports:
- name: http
port: 9010
protocol: TCP
targetPort: 9000
selector:
k8s-app: appname
component: play
env: dev

后端复制控制器 Yaml 文件

apiVersion: v1
kind: ReplicationController
metadata:
name: backend
spec:
replicas: 3
template:
metadata:
name: backend
labels:
k8s-app: beckend
component: play
env: dev
spec:
nodeSelector:
resource-group: oppv
containers:
- name: appname
image: IMAGE_TEMPLATE
imagePullPolicy: Always
ports:
- containerPort: 9000
command: [ "./docker-entrypoint.sh" ]
resources:
requests:
memory: "request_mem"
cpu: "request_cpu"
limits:
memory: "limit_mem"
cpu: "limit_cpu"
volumeMounts:
- name: config-volume
mountPath: /app/vipin/play/conf
volumes:
- name: config-volume
configMap:
name: appname