小记一次docker pull报错的解决

问题

这个问题是由于我使用docker pull命令拉取新镜像时频繁报错：

docker pull captainvalk/yesplaymusic:latest
Error response from daemon: Get "https://registry-1.docker.io/v2/captainvalk/yesplaymusic/manifests/sha256:dd8d8659fda26ba883f951d0dbf7d9236957c3a91ff9f00e6167989978a31457": read tcp 192.168.0.158:39888->54.83.42.45:443: read: connection reset by peer

首先的排查思路当然是从镜像仓库着手，所以我尝试把/etc/docker/daemon.json中的镜像加速器还原为默认：

  1 {
  2   "registry-mirrors": ["https://registry.docker-cn.com"]
  3 }

重启docker服务，无效

Tips:其实这个思路是完全错误的，因为我pull的是我上传到dockerhub中自己的镜像，所以不会通过镜像加速器下载。

使用必应搜索一番之后发现原来问题出在指向的registry-1.docker.io IP无法访问。解决方法是通过dig命令在dns中找到registry-1.docker.io能访问的ip，然后在host中修改

解决

dig @114.114.114.114 registry-1.docker.io

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.9 <<>> @114.114.114.114 registry-1.docker.io
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11785
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;registry-1.docker.io.    IN  A

;; ANSWER SECTION:
registry-1.docker.io.  77  IN  A  3.215.51.67
registry-1.docker.io.  77  IN  A  54.242.59.189
registry-1.docker.io.  77  IN  A  54.83.42.45

;; Query time: 11 msec
;; SERVER: 114.114.114.114#53(114.114.114.114)
;; WHEN: Thu Sep 15 09:14:32 CST 2022
;; MSG SIZE  rcvd: 86

vim /etc/host

54.242.59.189 registry-1.docker.io #填入指定IP

systemctl restart docker

重启docker服务

成功pull

docker pull captainvalk/yesplaymusic:latest
latest: Pulling from captainvalk/yesplaymusic
8663204ce13b: Already exists 
a1484661dfe6: Already exists 
2f78a3560d10: Already exists 
a517401f7a94: Already exists 
294d17c34d13: Already exists 
7051f5a2f4b1: Already exists 
279ca806a0b4: Already exists 
805fa4d25d18: Already exists 
7da1afad3cfe: Already exists 
8f332da9d959: Pull complete 
Digest: sha256:dd8d8659fda26ba883f951d0dbf7d9236957c3a91ff9f00e6167989978a31457
Status: Downloaded newer image for captainvalk/yesplaymusic:latest
docker.io/captainvalk/yesplaymusic:latest