saltstack升级
1.背景
saltstack出现安全漏洞，5.1前后爆出很多设备已经变成矿机。
2.处理方法
升级到最新版本salt
3.官方升级方法
yum install //repo.saltstack.com/yum/redhat/salt-repo-latest.el6.noarch.rpm (centos6–python2)
yum install //repo.saltstack.com/py3/redhat/salt-py3-repo-latest.el7.noarch.rpm (centos7-python3)
yum clean expire-cache
yum install salt-minion
service salt-minion restart
4.yum更新遇到的问题
Cannot open: //repo.saltstack.com/yum/redhat/salt-repo-latest.el6.noarch.rpm. Skipping.
Error: Nothing to do
解决方法：
yum update wget nss -y
