Ubuntu18.04安装MongoDB4.4后执行apt-get update出现GPG错误

问题说明 #

在Ubuntu 18.04安装MongoDB 4.4后，执行sudo apt-get update时出现MongoDB 4.0仓库的GPG密钥过期错误，即使仅安装了4.4版本，原因是系统中残留了MongoDB 4.0的仓库配置文件。

错误日志如下：

Ign:2 https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 InRelease
Ign:3 https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.4 InRelease
Hit:4 http://security.ubuntu.com/ubuntu bionic-security InRelease
Hit:5 http://us.archive.ubuntu.com/ubuntu bionic InRelease
Get:6 https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 Release [2,989 B]
Hit:7 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease
Hit:8 https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.4 Release
Hit:10 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease
Get:11 https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 Release.gpg [801 B]
Ign:11 https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 Release.gpg
Reading package lists... Done
W: GPG error: https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 Release: The following signatures were invalid: EXPKEYSIG 68818C72E52529D4 MongoDB 4.0 Release Signing Key <packaging@mongodb.com>
E: The repository 'https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 Release' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

解决步骤 #

• 列出系统中所有MongoDB相关的仓库配置文件：

  ls /etc/apt/sources.list.d/mongodb*.list
  

  你会看到包含mongodb-org-4.0.list的文件，这就是问题根源。

• 删除MongoDB 4.0的仓库配置文件：

  sudo rm /etc/apt/sources.list.d/mongodb-org-4.0.list
  

  若不确定文件名，可先查看文件内容确认：cat /etc/apt/sources.list.d/mongodb-org-4.0.list

• 重新导入MongoDB 4.4的官方GPG密钥（确保密钥有效）：

  wget -qO - https://www.mongodb.org/static/pgp/server-4.4.asc | sudo apt-key add -
  

• 执行更新命令验证问题是否解决：

  sudo apt-get update
  

内容的提问来源于stack exchange，提问作者Joseph_01