部署nginx服务
创建nginx服务:
root@test02:/home/tioncico# kubectl create deployment nginx --image=nginx:1.14-alpine deployment.apps/nginx created root@test02:/home/tioncico# 查看nginx pod状态: root@test02:/home/tioncico# kubectl get pods NAME READY STATUS RESTARTS AGE nginx-7cbb8cd5d8-w9tn2 0/1 Pending 0 67s root@test02:/home/tioncico# 可以发现nginx属于pending状态,说明发生了异常 部署服务出错排查 查看pod详情: root@test02:/home/tioncico# kubectl describe pod nginx Name: nginx-7cbb8cd5d8-w9tn2 Namespace: default Priority: 0 Node: <none> Labels: app=nginx pod-template-hash=7cbb8cd5d8 Annotations: <none> Status: Pending IP: IPs: <none> Controlled By: ReplicaSet/nginx-7cbb8cd5d8 Containers: nginx: Image: nginx:1.14-alpine Port: <none> Host Port: <none> Environment: <none> Mounts: /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-fzjmq (ro) Conditions: Type Status PodScheduled False Volumes: kube-api-access-fzjmq: Type: Projected (a volume that contains injected data from multiple sources) TokenExpirationSeconds: 3607 ConfigMapName: kube-root-ca.crt ConfigMapOptional: <nil> DownwardAPI: true QoS Class: BestEffort Node-Selectors: <none> Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s node.kubernetes.io/unreachable:NoExecute op=Exists for 300s Events: Type Reason Age From Message ---- ------ ---- ---- ------- Warning FailedScheduling 25s (x7 over 7m21s) default-scheduler 0/1 nodes are available: 1 node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate. 可以看到最后的是 FailedScheduling , 原因是 0/1 nodes are available: 1 node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate. 这个是因为当创建单机版的 k8s 时，这个时候 master 节点是默认不允许调度 pod 。 解决方案是增加节点或者把master标记为可调度即可: kubectl taint nodes --all node-role.kubernetes.io/master- 再次查看pod状态: root@test02:/home/tioncico# kubectl get pods NAME READY STATUS RESTARTS AGE nginx-7cbb8cd5d8-w9tn2 1/1 Running 0 11m root@test02:/home/tioncico# 可看到已经可以运行 访问nginx 暴露nginx的端口: kubectl expose deploy nginx --port=80 --target-port=80 --type=NodePort 查看pod当前的ip地址: root@test02:/home/tioncico# kubectl get pod,svc NAME READY STATUS RESTARTS AGE pod/nginx-7cbb8cd5d8-w9tn2 1/1 Running 0 15m NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 17h service/nginx NodePort 10.96.119.144 <none> 80:32402/TCP 19s root@test02:/home/tioncico# 这个时候,通过curl 127.0.0.1:32402 即可访问nginx, root@test02:/home/tioncico# curl http://127.0.0.1:32402 <!DOCTYPE html> <html> <head> <title>Welcome to nginx!</title> <style> body { width: 35em; margin: 0 auto; font-family: Tahoma, Verdana, Arial, sans-serif; } </style> </head>
