```shell
# 通过 API 生成临时 Token（有效期 1 小时）
kubectl create token calico-node -n kube-system --duration=1h

# 检查 Token 有效性
curl -k -H "Authorization: Bearer <TOKEN>" https://<API-SERVER>:6443/api/v1/namespaces/kube-system/pods

# 升级chart
helm upgrade ingress-nginx ./ingress-nginx -n ingress --values ./ingress-nginx/values.yaml

# 清理缓存
sudo killall -HUP mDNSResponder

# 配置主从复制
stop slave;
change master to master_host='mysql-master',master_user='replicator',master_password='replicator123',master_log_file='mysql-bin.000001',master_log_pos=1786;
start slave;

# 清除所有复制配置（包括master.info文件）
reset slave all; 

# 访问业务
[root@master01 resources]# curl -H "host: bbs.iproute.cn" 10.3.202.101:`kubectl get svc/ingress-nginx-controller -n ingress-nginx -o jsonpath="{.spec.ports[?(@.port==80)].nodePort}" -n ingress`

# calicoctl相关命令
[root@master01 ~]# ./calicoctl-linux-amd64 node status
Calico process is running.

IPv4 BGP status
+--------------+-------------------+-------+----------+-------------+
| PEER ADDRESS |     PEER TYPE     | STATE |  SINCE   |    INFO     |
+--------------+-------------------+-------+----------+-------------+
| 10.3.204.101 | node-to-node mesh | up    | 05:11:14 | Established |
| 10.3.204.102 | node-to-node mesh | up    | 05:12:46 | Established |
+--------------+-------------------+-------+----------+-------------+

[root@master01 ~]# ./calicoctl-linux-amd64 get ipPool --allow-version-mismatch -o wide
NAME                  CIDR            NAT    IPIPMODE   VXLANMODE   DISABLED   SELECTOR
default-ipv4-ippool   10.244.0.0/16   true   Never      Never       false      all()
[root@master01 ~]# calicoctl ipam show --show-blocks --allow-version-mismatch
[root@master01 ~]# calicoctl ipam show --allow-version-mismatch
+----------+---------------+-----------+------------+-------------+
| GROUPING |     CIDR      | IPS TOTAL | IPS IN USE |  IPS FREE   |
+----------+---------------+-----------+------------+-------------+
| IP Pool  | 10.244.0.0/16 |     65536 | 2294 (4%)  | 63242 (96%) |
+----------+---------------+-----------+------------+-------------+
```