kubernetes集群新增node

kubernetes集群要新增node，首先要配置ssh免密登陆

root@ht:/etc/ansible# ssh-copy-id 172.18.196.6 
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@172.18.196.6's password: 
Permission denied, please try again.
root@172.18.196.6's password: 
Permission denied, please try again.
root@172.18.196.6's password: 
Permission denied (publickey,password).

这里出现Permission denied, please try again.出现这个问题应该是服务端SSH 服务配置了禁止root用户登录策略。

所以进入服务端172.18.196.6修改配置

/etc/ssh/sshd_config

将PermitRootLogin改成yes
#PermitRootLogin prohibit-password
PermitRootLogin yes

然后重启ssh服务

service sshd restart

如果还错误的话，也可以修改一下ssh的密码

ssh-keygen -t rsa -b 2048

passwd root

再尝试建立就可以了

然后修改hosts文件

...
# 预留组，后续添加node节点使用
[new-node]
172.18.196.6 NODE_ID=node6 NODE_IP="172.18.196.6"
...

再运行

cd /etc/ansible && ansible-playbook 20.addnode.yml