1.docker 相关问题

1. 如果操作了防火墙，再启动容器会提示错误，错误信息是防火墙相关的错误，此时需要重启docker服务

# centos7 重启docker
systemctl restart docker #重启docker服务

2. 阿里云镜像加速

 

 

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://xuq3p1fy.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

3.升级centos内核

rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org && \
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm && \
yum --enablerepo=elrepo-kernel install kernel-ml-devel kernel-ml -y && \
grub2-set-default 0 

#然后需要重启 reboot

 

4.swarm集群加入节点失败（节点间时间不一致）

Error response from daemon: error while validating Root CA Certificate: x509: certificate has expired or is not yet valid

yum -y install ntp ntpdate && ntpdate cn.pool.ntp.org

 

5.docker服务起不来，错误看不清？

docker service ps --no-trunc <service>