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客观的

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客观的

客观的

想了解使用变得成为 ansible 用户会导致“权限被拒绝（公钥）”。

用户ansible运行 ansible-playbook 来检出 Github 存储库。SSH 密钥已通过 ssh-copy-id 与用户一起复制。

没有变得，剧本运行。

[ansible@ip-172-31-39-108 playbooks]$ whoami
ansible

[ansible@ip-172-31-39-108 playbooks]$ ansible-playbook git.yml
PLAY [Git example] *************************************************************
TASK [setup] *******************************************************************
ok: [ub01]
TASK [check out the repository on the host] ************************************
changed: [ub01]
PLAY RECAP *********************************************************************
ub01                       : ok=2    changed=1    unreachable=0    failed=0

然而，使用“成为：是”导致错误。

[ansible@ip-172-31-39-108 playbooks]$ ansible-playbook git.yml
PLAY [Git example] *************************************************************
TASK [setup] *******************************************************************
ok: [ub01]
TASK [check out the repository on the host] ************************************
fatal: [ub01]: FAILED! => {"changed": false, "cmd": "/usr/bin/git clone --origin origin '' /home/ansible/project/mezzanine-example", "failed": true, "msg": "Cloning into '/home/ansible/project/mezzanine-example'...\nPermission denied (publickey).\r\nfatal: Could not read from remote repository.\n\nPlease make sure you have the correct access rights\nand the repository exists.", "rc": 128, "stderr": "Cloning into '/home/ansible/project/mezzanine-example'...\nPermission denied (publickey).\r\nfatal: Could not read from remote repository.\n\nPlease make sure you have the correct access rights\nand the repository exists.\n", "stdout": "", "stdout_lines": []}
        to retry, use: --limit @/home/ansible/playbooks/git.retry

PLAY RECAP *********************************************************************
ub01                       : ok=1    changed=0    unreachable=0    failed=1

ssh-agent 正在运行，并且私钥已添加。

[ansible@ip-172-31-39-108 playbooks]$ eval $(ssh-agent -s)
Agent pid 1513

[ansible@ip-172-31-39-108 playbooks]$ ssh-add ~/.ssh/id_rsa
Identity added: /home/ansible/.ssh/id_rsa (/home/ansible/.ssh/id_rsa)

问题

请解释为什么会发生这种情况或指出需要调查的资源。

另外，我只在运行 ansible-playbook 的服务器中启动了 ssh-agent，但在目标服务器上没有启动。Github SSH 身份验证如何在目标服务器上进行？

剧本

- name: Git example
  hosts: webservers
  become: no    # <----- Changing to yes cause the issue
  become_user: ansible
  become_method: sudo
  vars:
    repo_url: [email protected]:lorin/mezzanine-example.git
    proj_dirname: /home/ansible/project
    proj_name: mezzanine-example
    proj_path: "{{ proj_dirname }}/{{ proj_name }}"
  tasks:
    - name: check out the repository on the host
      git: repo={{ repo_url }} dest={{ proj_path }} accept_hostkey=yes

配置

主办方

[webservers]
ub01
#rh01

ansible.cfg

[ssh_connection]
ssh_args = -o ControlMaster=auto -o ControlPersist=60s -o ForwardAgent=yes

环境

Ansible playbook 在 RedHat 上运行。

NAME="Red Hat Enterprise Linux Server"
VERSION="7.3 (Maipo)"

目标主机是Ubuntu。

DISTRIB_DESCRIPTION="Ubuntu 16.04.1 LTS"

相关问题

控制台-vvvvv 输出

TASK [check out the repository on the host] ************************************
task path: /home/ansible/playbooks/git.yml:12
Using module file /usr/lib/python2.7/site-packages/ansible/modules/core/source_control/git.py
<ub01> ESTABLISH SSH CONNECTION FOR USER: None
<ub01> SSH: ansible.cfg set ssh_args: (-o)(ControlMaster=auto)(-o)(ControlPersist=60s)(-o)(ForwardAgent=yes)
<ub01> SSH: ansible_password/ansible_ssh_pass not set: (-o)(KbdInteractiveAuthentication=no)(-o)(PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey)(-o)(PasswordAuthentication=no)
<ub01> SSH: ANSIBLE_TIMEOUT/timeout set: (-o)(ConnectTimeout=10)
<ub01> SSH: PlayContext set ssh_common_args: ()
<ub01> SSH: PlayContext set ssh_extra_args: ()
<ub01> SSH: found only ControlPersist; added ControlPath: (-o)(ControlPath=/home/ansible/.ansible/cp/ansible-ssh-%h-%p-%r)
<ub01> SSH: EXEC ssh -vvv -o ControlMaster=auto -o ControlPersist=60s -o ForwardAgent=yes -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o ConnectTimeout=10 -o ControlPath=/home/ansible/.ansible/cp/ansible-ssh-%h-%p-%r ub01 '/bin/sh -c '"'"'( umask 77 && mkdir -p "` echo /tmp/ansible-tmp-1485919043.94-240537002849590 `" && echo ansible-tmp-1485919043.94-240537002849590="` echo /tmp/ansible-tmp-1485919043.94-240537002849590 `" ) && sleep 0'"'"''
<ub01> PUT /tmp/tmpAjaOMc TO /tmp/ansible-tmp-1485919043.94-240537002849590/git.py
<ub01> SSH: ansible.cfg set ssh_args: (-o)(ControlMaster=auto)(-o)(ControlPersist=60s)(-o)(ForwardAgent=yes)
<ub01> SSH: ansible_password/ansible_ssh_pass not set: (-o)(KbdInteractiveAuthentication=no)(-o)(PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey)(-o)(PasswordAuthentication=no)
<ub01> SSH: ANSIBLE_TIMEOUT/timeout set: (-o)(ConnectTimeout=10)
<ub01> SSH: PlayContext set ssh_common_args: ()
<ub01> SSH: PlayContext set sftp_extra_args: ()
<ub01> SSH: found only ControlPersist; added ControlPath: (-o)(ControlPath=/home/ansible/.ansible/cp/ansible-ssh-%h-%p-%r)
<ub01> SSH: EXEC sftp -b - -vvv -o ControlMaster=auto -o ControlPersist=60s -o ForwardAgent=yes -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o ConnectTimeout=10 -o ControlPath=/home/ansible/.ansible/cp/ansible-ssh-%h-%p-%r '[ub01]'
<ub01> ESTABLISH SSH CONNECTION FOR USER: None
<ub01> SSH: ansible.cfg set ssh_args: (-o)(ControlMaster=auto)(-o)(ControlPersist=60s)(-o)(ForwardAgent=yes)
<ub01> SSH: ansible_password/ansible_ssh_pass not set: (-o)(KbdInteractiveAuthentication=no)(-o)(PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey)(-o)(PasswordAuthentication=no)
<ub01> SSH: ANSIBLE_TIMEOUT/timeout set: (-o)(ConnectTimeout=10)
<ub01> SSH: PlayContext set ssh_common_args: ()
<ub01> SSH: PlayContext set ssh_extra_args: ()
<ub01> SSH: found only ControlPersist; added ControlPath: (-o)(ControlPath=/home/ansible/.ansible/cp/ansible-ssh-%h-%p-%r)
<ub01> SSH: EXEC ssh -vvv -o ControlMaster=auto -o ControlPersist=60s -o ForwardAgent=yes -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o ConnectTimeout=10 -o ControlPath=/home/ansible/.ansible/cp/ansible-ssh-%h-%p-%r ub01 '/bin/sh -c '"'"'setfacl -m u:ansible:r-x /tmp/ansible-tmp-1485919043.94-240537002849590/ /tmp/ansible-tmp-1485919043.94-240537002849590/git.py && sleep 0'"'"''
<ub01> ESTABLISH SSH CONNECTION FOR USER: None
<ub01> SSH: ansible.cfg set ssh_args: (-o)(ControlMaster=auto)(-o)(ControlPersist=60s)(-o)(ForwardAgent=yes)
<ub01> SSH: ansible_password/ansible_ssh_pass not set: (-o)(KbdInteractiveAuthentication=no)(-o)(PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey)(-o)(PasswordAuthentication=no)
<ub01> SSH: ANSIBLE_TIMEOUT/timeout set: (-o)(ConnectTimeout=10)
<ub01> SSH: PlayContext set ssh_common_args: ()
<ub01> SSH: PlayContext set ssh_extra_args: ()
<ub01> SSH: found only ControlPersist; added ControlPath: (-o)(ControlPath=/home/ansible/.ansible/cp/ansible-ssh-%h-%p-%r)
<ub01> SSH: EXEC ssh -vvv -o ControlMaster=auto -o ControlPersist=60s -o ForwardAgent=yes -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o ConnectTimeout=10 -o ControlPath=/home/ansible/.ansible/cp/ansible-ssh-%h-%p-%r -tt ub01 '/bin/sh -c '"'"'sudo -H -S -n -u ansible /bin/sh -c '"'"'"'"'"'"'"'"'echo BECOME-SUCCESS-cxuzmrsbxdvydelfnjrsmgvocgkeptxd; /usr/bin/python /tmp/ansible-tmp-1485919043.94-240537002849590/git.py'"'"'"'"'"'"'"'"' && sleep 0'"'"''
<ub01> ESTABLISH SSH CONNECTION FOR USER: None
<ub01> SSH: ansible.cfg set ssh_args: (-o)(ControlMaster=auto)(-o)(ControlPersist=60s)(-o)(ForwardAgent=yes)
<ub01> SSH: ansible_password/ansible_ssh_pass not set: (-o)(KbdInteractiveAuthentication=no)(-o)(PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey)(-o)(PasswordAuthentication=no)
<ub01> SSH: ANSIBLE_TIMEOUT/timeout set: (-o)(ConnectTimeout=10)
<ub01> SSH: PlayContext set ssh_common_args: ()
<ub01> SSH: PlayContext set ssh_extra_args: ()
<ub01> SSH: found only ControlPersist; added ControlPath: (-o)(ControlPath=/home/ansible/.ansible/cp/ansible-ssh-%h-%p-%r)
<ub01> SSH: EXEC ssh -vvv -o ControlMaster=auto -o ControlPersist=60s -o ForwardAgent=yes -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o ConnectTimeout=10 -o ControlPath=/home/ansible/.ansible/cp/ansible-ssh-%h-%p-%r ub01 '/bin/sh -c '"'"'rm -f -r /tmp/ansible-tmp-1485919043.94-240537002849590/ > /dev/null 2>&1 && sleep 0'"'"''
fatal: [ub01]: FAILED! => {
    "changed": false,
    "cmd": "/usr/bin/git clone --origin origin '' /home/ansible/project/mezzanine-example",
    "failed": true,
    "invocation": {
        "module_args": {
            "accept_hostkey": true,
            "bare": false,
            "clone": true,
            "depth": null,
            "dest": "/home/ansible/project/mezzanine-example",
            "executable": null,
            "force": false,
            "key_file": null,
            "recursive": true,
            "reference": null,
            "refspec": null,
            "remote": "origin",
            "repo": "[email protected]:lorin/mezzanine-example.git",
            "ssh_opts": null,
            "track_submodules": false,
            "umask": null,
            "update": true,
            "verify_commit": false,
            "version": "HEAD"
        },
        "module_name": "git"
    },
    "msg": "Cloning into '/home/ansible/project/mezzanine-example'...\nPermission denied (publickey).\r\nfatal: Could not read from remote repository.\n\nPlease make sure you have the correct access rights\nand the repository exists.",
    "rc": 128,
    "stderr": "Cloning into '/home/ansible/project/mezzanine-example'...\nPermission denied (publickey).\r\nfatal: Could not read from remote repository.\n\nPlease make sure you have the correct access rights\nand the repository exists.\n",
    "stdout": "",
    "stdout_lines": []
}
        to retry, use: --limit @/home/ansible/playbooks/git.retry

PLAY RECAP *********************************************************************
ub01                       : ok=1    changed=0    unreachable=0    failed=1

更新

感谢@Jakuje和其他文章的回答，我了解到SSH代理监听UNIX套接字文件。文件名存储在SSH_AUTH_SOCK环境变量中。但是，SUDO消除了环境变量，因此sudo-ed SSH客户端不知道如何与SSH代理通信。因此，无法通过SSh身份验证。

解决方案在@Jakuje 提供的文章中。

在此处输入图片描述

答案1

当您转发ssh-agent套接字时，它将使用正在连接的用户的权限进行创建。become稍后使用 将ansible用户更改为某个不同的用户（ansible）sudo，这会导致：

  • 目标用户无权访问转发套接字
  • 在以下情况下不会保留与代理套接字“保持连接”的环境变量：sudo

如果目标用户是root，那么第一个问题应该不成问题。第二个问题可以通过/etc/sudoers在服务器上修改一行来解决

 Defaults    env_keep += "SSH_AUTH_SOCK"

在在 SO 上发帖。

克服第二个问题会更加复杂，因为您不希望所有用户都可以使用转发的套接字。您是否考虑过以用户身份直接连接ansible？

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