K8S集群冒烟测试

1. 创建nginx ds

# 写入配置
$ cat > nginx-ds.yml <<EOF
apiVersion: v1
kind: Service
metadata:
name: nginx-ds
labels:
app: nginx-ds
spec:
type: NodePort
selector:
app: nginx-ds
ports:
- name: http
port: 80
targetPort: 80
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: nginx-ds
spec:
selector:
matchLabels:
app: nginx-ds
template:
metadata:
labels:
app: nginx-ds
spec:
containers:
- name: my-nginx
image: nginx:1.19
ports:
- containerPort: 80
EOF

# 创建ds
$ kubectl apply -f nginx-ds.yml

 

# 2. 检查各种ip连通性

# 检查各 Node 上的 Pod IP 连通性
$ kubectl get pods -o wide

# 在每个节点上ping pod ip
$ ping 

# 检查service可达性
$ kubectl get svc

# 在每个节点上访问服务
$ curl :

# 在每个节点检查node-port可用性
$ curl :

 

# 3. 检查dns可用性

# 创建一个nginx pod
$ cat > pod-nginx.yaml <<EOF
apiVersion: v1
kind: Pod
metadata:
name: nginx
spec:
containers:
- name: nginx
image: docker.io/library/nginx:1.19
ports:
- containerPort: 80
EOF

# 创建pod
$ kubectl apply -f pod-nginx.yaml

# 进入pod，查看dns
$ kubectl exec nginx -it -- /bin/bash

# 查看dns配置
root@nginx:/# cat /etc/resolv.conf

# 查看名字是否可以正确解析
root@nginx:/# ping nginx-ds

 

# 4. 日志功能

测试使用kubectl查看pod的容器日志

$ kubectl get pods
$ kubectl logs 
```
# 5. Exec功能
测试kubectl的exec功能

```bash
$ kubectl get pods -l app=nginx-ds
$ kubectl exec -it  -- nginx -v