問題

拉取鏡像時出現如下提示:

root@ubuntu:~# docker search zabbix-proxy-sqlite3
NAME                                          DESCRIPTION                                     STARS               OFFICIAL            AUTOMATED
zabbix/zabbix-proxy-sqlite3                   Zabbix proxy with SQLite3 database support      32                                      [OK]
zeduperes/zabbix-proxy-sqlite3-alpine     
...
root@ubuntu:~# docker pull zabbix-proxy-sqlite3
Using default tag: latest
Error response from daemon: pull access denied for zabbix-proxy-sqlite3, repository does not exist or may require 'docker login': denied: requested access to the resource is denied

理論上從 docker hub 拉取鏡像時是不需要的登錄, 所以就只有一個原因: repository does not exist,
于是我指定了倉庫的用戶名, 重新拉取

latest: Pulling from zabbix/zabbix-proxy-sqlite3
df20fa9351a1: Pull complete 
1414a6c7d595: Pull complete 
54e29d68e62a: Pull complete 
30d6c368b026: Pull complete 
Digest: sha256:4f24c537906ba53ff7955de954281404045aaf649d77dda41b50da2d206ceb41
Status: Downloaded newer image for zabbix/zabbix-proxy-sqlite3:latest
docker.io/zabbix/zabbix-proxy-sqlite3:latest

這里涉及了一個基礎知識

docker hub 的兩種倉庫

1. 頂層倉庫, 由docker hub 自己管理
2. 用戶倉庫, 由開發人員創建維護, 命名構成: 用戶名/倉庫名, 例如: zabbix/zabbix-proxy-sqlite3