Docker pull镜像一直在Waiting无法下载，根本解决方法

1、现象描述：

docker pull 拉去镜像一直在等待，无法下载，最后失败如下：

[root@localhost docker]# docker pull zookeeper Using default tag: latest latest: Pulling from library/zookeeper 2ec76a50fe7c: Retrying in 1 second fab7f202453a: Retrying in 1 second ee59ca42def8: Retrying in 1 second 2ce2282f972f: Waiting d2a9e456ba82: Waiting b59edc04016d: Waiting 1e52b217ebb4: Waiting 7a5027dbe828: Waiting 4f4fb700ef54: Waiting 8e018b2f6fcb: Waiting error pulling image configuration: download failed after attempts=6: dial tcp 199.59.148.246:443: connect: connection refused

2、现象分析：

经排查分析：

•        原因1：服务器DNS无法解析
•        原因2：docker 源有问题

3、解决方法：

3.1、配置并更新DNS

以CentOS7为例，直接操作哦：

vi /etc/sysconfig/network-scripts/ifcfg-eth0 DNS1=223.5.5.5 DNS2=223.6.6.6    vi /etc/resolv.conf nameserver 223.5.5.5 nameserver 223.6.6.6 nameserver 8.8.8.8    systemctl restart network   ###测试一下 是否联通 ping  223.5.5.5

3.2、更新docker源，换成国内源

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

3.3、同步时间

####需安装ntp， 自行搜  ntpdate ntp1.aliyun.com

4、结果如下，6得很：

[root@localhost docker]# docker pull zookeeper Using default tag: latest latest: Pulling from library/zookeeper a2abf6c4d29d: Pull complete 2bbde5250315: Pull complete 202a34e7968e: Pull complete 4e4231e30efc: Pull complete 707593b95343: Pull complete b070e6dedb4b: Pull complete 46e5380f3905: Pull complete 8b7e330117e6: Pull complete Digest: sha256:2c8c5c2db6db22184e197afde13e33dad849af90004c330f20b17282bcd5afd7 Status: Downloaded newer image for zookeeper:latest docker.io/library/zookeeper:latest