1.创建一个资源配置清单nginx容器
在hdss7-21或hdss7-22任意一个节点上创建一个资源配置清单：
cat > /root/nginx-ds.yaml <<'eof'
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: my-nginx
spec:
selector:
matchLabels:
app: my-nginx
template:
metadata:
labels:
app: my-nginx
spec:
containers:
- name: my-nginx
image: harbor.od.com/public/nginx:v1.7.9
ports:
- containerPort: 80
eof
kubectl create -f /root/nginx-ds.yaml
2.集群检查
在hdss7-21:curl 172.7.21.2
在hdss7-22:curl 172.7.22.2
[root@hdss7-21 bin]# kubectl get cs # 查看各组件状态
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-0 Healthy {"health": "true"}
etcd-1 Healthy {"health": "true"}
etcd-2 Healthy {"health": "true"}
[root@hdss7-21 bin]# kubectl get node -o wide # 查看各节点状态
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
hdss7-21.host.com Ready master,node 11h v1.19.2 10.4.7.21 <none> CentOS Linux 7 (Core) 3.10.0-1127.el7.x86_64 docker://19.3.13
hdss7-22.host.com Ready master,node 11h v1.19.2 10.4.7.22 <none> CentOS Linux 7 (Core) 3.10.0-1127.el7.x86_64 docker://19.3.13
[root@hdss7-21 bin]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
my-nginx-h88nr 1/1 Running 1 10h 172.7.22.2 hdss7-22.host.com <none> <none>
my-nginx-vrlsk 1/1 Running 0 10h 172.7.21.2 hdss7-21.host.com <none> <none>
[root@hdss7-21 ~]# curl 172.7.21.2
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
Welcome to nginx!
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a rel="nofollow" href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a rel="nofollow" href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>