包含多个 ssh 密钥 capistrano 部署的 Github SSH 配置失败，提示找不到存储库

Question

~/.ssh/config

# User_A
Host github.com-User_A
HostName github.com
User git
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa
IdentitiesOnly yes

# User_B
Host github.com-User_B
HostName github.com
User git
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa_user_b
IdentitiesOnly yes

# http://serverfault.com/questions/400633/capistrano-deploying-to-different-servers-with-different-authentication-methods
Host example.com
IdentityFile ~/.ssh_keys/example_env.pem
ForwardAgent yes

在本地机器上：

  $ ssh -T git@github.com
  Hi User_B! You've successfully authenticated, but GitHub does not provide shell access.

在远程机器上

    ~$ ssh remote_user@example.com

    [remote_user@example ~]$ ssh -T git@github.com
    Hi User_A! You've successfully authenticated, but GitHub does not provide shell access.

注意：

• ssh-add -l 显示所有提到的密钥

• deploy.rb 包含：

   set :repository,  "git@User_B:<REPO_NAME>"
  
   ssh_options[:forward_agent] = true
  

我正在尝试使用 Capistrano 将我的应用程序部署到一个 Amazon EC2 实例，我已经使用 ssh-add 将 .pem 文件添加到我的本地计算机中，并且可以在 ssh-add 的输出中看到它-l。但是我在部署时遇到以下错误：

** [example.com :: err] ERROR: Repository not found.
** fatal: The remote end hung up unexpectedly

以下是我的 cap deploy 命令的完整输出：

$ cap bat deploy

  triggering load callbacks
* executing `bat'
  triggering start callbacks for `deploy'
* executing `multistage:ensure'
* executing `deploy'
* executing `deploy:update'
   ** transaction: start
* executing `deploy:update_code'
  updating the cached checkout on all servers
  executing locally: "git ls-remote git@User_B:<REPO_NAME> <BRANCH_NAME>"
  command finished in 6296ms
* executing "if [ -d /srv/<APP_NAME>/shared/cached-copy ]; then cd /srv/<APP_NAME>/shared/cached-copy && git fetch -q origin && git fetch --tags -q origin && git reset -q --hard df84fadff305e1729991caddde47f6802e424d57 && git clean -q -d -x -f; else git clone -q git@User_B:<REPO_NAME> /srv/<APP_NAME>/shared/cached-copy && cd /srv/<APP_NAME>/shared/cached-copy && git checkout -q -b deploy df84fadff305e1729991caddde47f6802e424d57; fi"
  servers: ["example.com"]
  [example.com] executing command
   ** [example.com :: err] ERROR: Repository not found.
   ** fatal: The remote end hung up unexpectedly
  command finished in 3811ms
  *** [deploy:update_code] rolling back
* executing "rm -rf /srv/<APP_NAME>/releases/20130723222237; true"
  servers: ["example.com"]
  [example.com] executing command
  command finished in 477ms
  failed: "sh -c 'if [ -d /srv/<APP_NAME>/shared/cached-copy ]; then cd /srv/<APP_NAME>/shared/cached-copy && git fetch -q origin && git fetch --tags -q origin && git reset -q --hard df84fadff305e1729991caddde47f6802e424d57 && git clean -q -d -x -f; else git clone -q git@User_B:<REPO_NAME> /srv/<APP_NAME>/shared/cached-copy && cd /srv/<APP_NAME>/shared/cached-copy && git checkout -q -b deploy df84fadff305e1729991caddde47f6802e424d57; fi'" on example.com

所以我猜这个错误是由于检测到多个 SSH 密钥之间产生的冲突引起的，即在本地计算机上 User_B（谁是存储库的成员）被用作默认值，但是在远程计算机上 User_A（谁没有访问权限存储库）被使用。

如果我的假设是正确的，有人可以帮我解决这个问题吗？代理转发时是否可以使用特定的用户配置？如果没有，那有什么办法解决这个问题？

谢谢。

Answer 1

好吧，看来 ~/.ssh/config 中列出的键的顺序很重要。

最初是

    # User_A
    Host github.com-User_A
    HostName github.com
    User git
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_rsa
    IdentitiesOnly yes

    # User_B
    Host github.com-User_B
    HostName github.com
    User git
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_rsa_user_b
    IdentitiesOnly yes

    # http://serverfault.com/questions/400633/capistrano-deploying-to-different-servers-with-different-authentication-methods
    Host example.com
    IdentityFile ~/.ssh_keys/example_env.pem
    ForwardAgent yes

后来我这样做了：

    # User_B
    Host github.com-User_B
    HostName github.com
    User git
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_rsa_user_b
    IdentitiesOnly yes

    # User_A
    Host github.com-User_A
    HostName github.com
    User git
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_rsa
    IdentitiesOnly yes


    # http://serverfault.com/questions/400633/capistrano-deploying-to-different-servers-with-different-authentication-methods
    Host example.com
    IdentityFile ~/.ssh_keys/example_env.pem
    ForwardAgent yes

但是在这样做之后我没有重新启动机器，因此更改没有生效。

今天早上我在发布上述问题后启动我的机器后发现它正在工作：

在本地机器上：

  $ ssh -T git@github.com
  Hi User_B! You've successfully authenticated, but GitHub does not provide shell access.

在远程机器上

  $ ssh -T git@github.com
  Hi User_B! You've successfully authenticated, but GitHub does not provide shell access.

希望这可以帮助其他人，以防他遇到类似的问题。

谢谢。