Kubernetes

docker

• https://docs.docker.com/engine/install/ubuntu/#installation-methods

minikube

minikube is local Kubernetes, focusing on making it easy to learn and develop for Kubernetes.

minikube start

alias kubectl="minikube kubectl --"

kubectl proxy --address='0.0.0.0' --port=8002 --accept-hosts='^*$'
Starting to serve on [::]:8002

http://192.168.0.171:8002/api/v1/namespaces/kubernetes-dashboard/services/http:kubernetes-dashboard:/proxy/#/pod?namespace=default

FAQ 遇到 Exiting due to DRV_NOT_HEALTHY: Found driver(s) but none were healthy. See above for suggestions how to fix installed drivers.

sudo usermod -aG docker $USER && newgrp docker

k8s

• create namespace: kubectl create ns {name}
• create deployment : kubectl {namespace} {create/apply} -f manifests/{service_name}
  • example: kubectl -n{name} apply -f manifests/manifests/swagger.yaml
• get service: kubectl -n{name} get service

deploy a service

1. write a yaml file to create a deployment.

2. create deploment: kubectl {namespace} create -f manifests/{service_name}

3. checking pod status: kubectl -n{name} get pod

4. checkout node: kuberctl get node

5. find a node and find hostname: kubectl describe node {nodeid} | grep hostname

6. go to [K8S dev], select Load Balancer product, paste the hostname and port predefined on the yaml file.

7. make sure your load balancer is running and ipv4 is up

8. checkout vip

9. go to [K8S dev] select DNS product, create a record with the vip

# Deployment
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: swagger-tools
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: swagger-tools
  template:
    metadata:
      labels:
        app.kubernetes.io/name: swagger-tools
    spec:
      containers:
      - name: swagger-tools
        image: swaggerapi/swagger-editor
        imagePullPolicy: Always
        env:
        - name: NAME
          value: noname
        ports:
        - name: http
          containerPort: 8080
          protocol: TCP
        readinessProbe:
          failureThreshold: 3
          httpGet:
            path: /
            port: http
            scheme: HTTP
          initialDelaySeconds: 10
          periodSeconds: 2
          successThreshold: 1
          timeoutSeconds: 1
        livenessProbe:
          failureThreshold: 3
          httpGet:
            path: /
            port: http
            scheme: HTTP
          initialDelaySeconds: 10
          periodSeconds: 2
          successThreshold: 1
          timeoutSeconds: 1
        resources:
          requests:
            cpu: 10m
            memory: 16Mi
          limits:
            cpu: 300m
            memory: 384Mi
# Service
---
apiVersion: v1
kind: Service
metadata:
  name: swagger-tools
  labels:
    app.kubernetes.io/name: swagger-tools
spec:
  type: NodePort
  selector:
    app.kubernetes.io/name: swagger-tools
  ports:
  - name: http
    port: 80
    nodePort: 30138
    protocol: TCP
    targetPort: http