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>