【问题标题】：Timeout waiting for privilege escalation prompt等待提权提示超时
【发布时间】：2019-12-28 23:03:10
【问题描述】：

上下文

我问这个问题是因为这两个问题/答案（one 和 two）没有多少上下文，我想扩展它。

我正在尝试使用 ansible client 2.8 配置 CentOS7 生产服务器。我的环境由一个主节点（NIS Server）和一个计算节点（NIS Client）组成。在配置实时服务器之前，我从 VirtualBoxes 建立了一个模拟生产环境的虚拟实验室 (vlab)。我将我的公钥复制到生产环境和 vlab 环境中。

问题

我的剧本与 vlab 一起工作。不幸的是，相同的命令/剧本对我没有 ssh 密码访问和 sudo 权限的生产节点失败。我得到的唯一反馈是这个错误"Timeout (7s) waiting for privilege escalation prompt: \u001b[?1h\u001b=\r\r"

问题

有谁知道导致这种行为的原因以及如何解决它？我在主目录上尝试了 SeLinux 权限，我最终禁用了它（sudo setenforce 0）。我得出的结论是，必须有一些外部的东西停止了 ansible 但是？

调试、日志记录

Ansible 配置

# config file for ansible -- https://raw.githubusercontent.com/ansible/ansible/devel/examples/ansible.cfg

[defaults]
timeout = 5
inventory = ./config/hosts
remote_user = lukas

SSHD 配置

HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key

SyslogFacility AUTHPRIV

AuthorizedKeysFile      .ssh/authorized_keys

PasswordAuthentication yes

ChallengeResponseAuthentication no

GSSAPIAuthentication yes
GSSAPICleanupCredentials no

UsePAM yes

X11Forwarding yes
UseDNS no

AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
AcceptEnv XMODIFIERS

Subsystem       sftp    /usr/libexec/openssh/sftp-server

Ansible 日志

# checking kernel version
$ uname -a
Linux compute01 3.10.0-514.26.2.el7.x86_64

# pinging compute node
$ ansible -m ping compute01
123.123.123.123 | SUCCESS => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/bin/python"
    }, 
    "changed": false, 
    "ping": "pong"
}

# installing vim
$ ansible compute01 -m yum -a 'name=vim state=installed' -b -K -u lukas
ansible 2.8.4
  config file = /home/lukas/Coding/projects/nebula-provision/ansible/producion/ansible.cfg
  configured module search path = [u'/home/lukas/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.12 (default, Nov 12 2018, 14:36:49) [GCC 5.4.0 20160609]
Using /home/lukas/Coding/projects/nebula-provision/ansible/producion/ansible.cfg as config file
BECOME password: 
setting up inventory plugins
host_list declined parsing /home/lukas/Coding/projects/nebula-provision/ansible/producion/config/hosts as it did not pass it's verify_file() method
script declined parsing /home/lukas/Coding/projects/nebula-provision/ansible/producion/config/hosts as it did not pass it's verify_file() method
auto declined parsing /home/lukas/Coding/projects/nebula-provision/ansible/producion/config/hosts as it did not pass it's verify_file() method
Not replacing invalid character(s) "set([u'-'])" in group name (kubernetes-master)
[DEPRECATION WARNING]: The TRANSFORM_INVALID_GROUP_CHARS settings is set to allow bad characters in group names by default, this will change, but still be user configurable on deprecation. This feature will be removed in version 2.10. Deprecation warnings can be disabled by setting
 deprecation_warnings=False in ansible.cfg.
....
Parsed /home/lukas/Coding/projects/nebula-provision/ansible/producion/config/hosts inventory source with ini plugin
Loading callback plugin minimal of type stdout, v2.0 from /usr/lib/python2.7/dist-packages/ansible/plugins/callback/minimal.pyc
META: ran handlers
<123.123.123.123> ESTABLISH SSH CONNECTION FOR USER: lukas
<123.123.123.123> SSH: EXEC ssh -vvv -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="lukas"' -o ConnectTimeout=5 -o ControlPath=/home/lukas/.ansible/cp/779c431db0 123.123.123.123 '/bin/sh -c '"'"'( umask 77 && mkdir -p "` echo /home/lukas/.ansible/tmp/ansible-tmp-1566570853.88-235437120093861 `" && echo ansible-tmp-1566570853.88-235437120093861="` echo /home/lukas/.ansible/tmp/ansible-tmp-1566570853.88-235437120093861 `" ) && sleep 0'"'"''
<123.123.123.123> (0, 'ansible-tmp-1566570853.88-235437120093861=/home/lukas/.ansible/tmp/ansible-tmp-1566570853.88-235437120093861\n', 'OpenSSH_7.2p2 Ubuntu-4ubuntu2.8, OpenSSL 1.0.2g  1 Mar 2016\r\ndebug1: Reading configuration data /etc/ssh/ssh_config\r\ndebug1: /etc/ssh/ssh_config line 19: Applying options for *\r\ndebug1: auto-mux: Trying existing master\r\ndebug2: fd 3 setting O_NONBLOCK\r\ndebug2: mux_client_hello_exchange: master version 4\r\ndebug3: mux_client_forwards: request forwardings: 0 local, 0 remote\r\ndebug3: mux_client_request_session: entering\r\ndebug3: mux_client_request_alive: entering\r\ndebug3: mux_client_request_alive: done pid = 12697\r\ndebug3: mux_client_request_session: session request sent\r\ndebug1: mux_client_request_session: master session id: 2\r\ndebug3: mux_client_read_packet: read header failed: Broken pipe\r\ndebug2: Received exit status from master 0\r\n')
<123.123.123.123> Attempting python interpreter discovery
<123.123.123.123> ESTABLISH SSH CONNECTION FOR USER: lukas
<123.123.123.123> SSH: EXEC ssh -vvv -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="lukas"' -o ConnectTimeout=5 -o ControlPath=/home/lukas/.ansible/cp/779c431db0 123.123.123.123 '/bin/sh -c '"'"'echo PLATFORM; uname; echo FOUND; command -v '"'"'"'"'"'"'"'"'/usr/bin/python'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python3.7'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python3.6'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python3.5'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python2.7'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python2.6'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'/usr/libexec/platform-python'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'/usr/bin/python3'"'"'"'"'"'"'"'"'; command -v '"'"'"'"'"'"'"'"'python'"'"'"'"'"'"'"'"'; echo ENDFOUND && sleep 0'"'"''
<123.123.123.123> (0, 'PLATFORM\nLinux\nFOUND\n/usr/bin/python\n/usr/bin/python2.7\n/usr/bin/python\nENDFOUND\n', 'OpenSSH_7.2p2 Ubuntu-4ubuntu2.8, OpenSSL 1.0.2g  1 Mar 2016\r\ndebug1: Reading configuration data /etc/ssh/ssh_config\r\ndebug1: /etc/ssh/ssh_config line 19: Applying options for *\r\ndebug1: auto-mux: Trying existing master\r\ndebug2: fd 3 setting O_NONBLOCK\r\ndebug2: mux_client_hello_exchange: master version 4\r\ndebug3: mux_client_forwards: request forwardings: 0 local, 0 remote\r\ndebug3: mux_client_request_session: entering\r\ndebug3: mux_client_request_alive: entering\r\ndebug3: mux_client_request_alive: done pid = 12697\r\ndebug3: mux_client_request_session: session request sent\r\ndebug1: mux_client_request_session: master session id: 2\r\ndebug3: mux_client_read_packet: read header failed: Broken pipe\r\ndebug2: Received exit status from master 0\r\n')
<123.123.123.123> ESTABLISH SSH CONNECTION FOR USER: lukas
<123.123.123.123> SSH: EXEC ssh -vvv -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="lukas"' -o ConnectTimeout=5 -o ControlPath=/home/lukas/.ansible/cp/779c431db0 123.123.123.123 '/bin/sh -c '"'"'/usr/bin/python && sleep 0'"'"''
<123.123.123.123> (0, '{"osrelease_content": "NAME=\\"CentOS Linux\\"\\nVERSION=\\"7 (Core)\\"\\nID=\\"centos\\"\\nID_LIKE=\\"rhel fedora\\"\\nVERSION_ID=\\"7\\"\\nPRETTY_NAME=\\"CentOS Linux 7 (Core)\\"\\nANSI_COLOR=\\"0;31\\"\\nCPE_NAME=\\"cpe:/o:centos:centos:7\\"\\nHOME_URL=\\"https://www.centos.org/\\"\\nBUG_REPORT_URL=\\"https://bugs.centos.org/\\"\\n\\nCENTOS_MANTISBT_PROJECT=\\"CentOS-7\\"\\nCENTOS_MANTISBT_PROJECT_VERSION=\\"7\\"\\nREDHAT_SUPPORT_PRODUCT=\\"centos\\"\\nREDHAT_SUPPORT_PRODUCT_VERSION=\\"7\\"\\n\\n", "platform_dist_result": ["centos", "7.3.1611", "Core"]}\n', 'OpenSSH_7.2p2 Ubuntu-4ubuntu2.8, OpenSSL 1.0.2g  1 Mar 2016\r\ndebug1: Reading configuration data /etc/ssh/ssh_config\r\ndebug1: /etc/ssh/ssh_config line 19: Applying options for *\r\ndebug1: auto-mux: Trying existing master\r\ndebug2: fd 3 setting O_NONBLOCK\r\ndebug2: mux_client_hello_exchange: master version 4\r\ndebug3: mux_client_forwards: request forwardings: 0 local, 0 remote\r\ndebug3: mux_client_request_session: entering\r\ndebug3: mux_client_request_alive: entering\r\ndebug3: mux_client_request_alive: done pid = 12697\r\ndebug3: mux_client_request_session: session request sent\r\ndebug1: mux_client_request_session: master session id: 2\r\ndebug3: mux_client_read_packet: read header failed: Broken pipe\r\ndebug2: Received exit status from master 0\r\n')
Using module file /usr/lib/python2.7/dist-packages/ansible/modules/system/setup.py
<123.123.123.123> PUT /home/lukas/.ansible/tmp/ansible-local-12685VGhDEA/tmpwDBaIn TO /home/lukas/.ansible/tmp/ansible-tmp-1566570853.88-235437120093861/AnsiballZ_setup.py
<123.123.123.123> SSH: EXEC sftp -b - -vvv -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="lukas"' -o ConnectTimeout=5 -o ControlPath=/home/lukas/.ansible/cp/779c431db0 '[123.123.123.123]'
<123.123.123.123> (0, 'sftp> put /home/lukas/.ansible/tmp/ansible-local-12685VGhDEA/tmpwDBaIn /home/lukas/.ansible/tmp/ansible-tmp-1566570853.88-235437120093861/AnsiballZ_setup.py\n', 'OpenSSH_7.2p2 Ubuntu-4ubuntu2.8, OpenSSL 1.0.2g  1 Mar 2016\r\ndebug1: Reading configuration data /etc/ssh/ssh_config\r\ndebug1: /etc/ssh/ssh_config line 19: Applying options for *\r\ndebug1: auto-mux: Trying existing master\r\ndebug2: fd 3 setting O_NONBLOCK\r\ndebug2: mux_client_hello_exchange: master version 4\r\ndebug3: mux_client_forwards: request forwardings: 0 local, 0 remote\r\ndebug3: mux_client_request_session: entering\r\ndebug3: mux_client_request_alive: entering\r\ndebug3: mux_client_request_alive: done pid = 12697\r\ndebug3: mux_client_request_session: session request sent\r\ndebug1: mux_client_request_session: master session id: 2\r\ndebug2: Remote version: 3\r\ndebug2: Server supports extension "posix-rename@openssh.com" revision 1\r\ndebug2: Server supports extension "statvfs@openssh.com" revision 2\r\ndebug2: Server supports extension "fstatvfs@openssh.com" revision 2\r\ndebug2: Server supports extension "hardlink@openssh.com" revision 1\r\ndebug2: Server supports extension "fsync@openssh.com" revision 1\r\ndebug3: Sent message fd 5 T:16 I:1\r\ndebug3: SSH_FXP_REALPATH . -> /home/lukas size 0\r\ndebug3: Looking up /home/lukas/.ansible/tmp/ansible-local-12685VGhDEA/tmpwDBaIn\r\ndebug3: Sent message fd 5 T:17 I:2\r\ndebug3: Received stat reply T:101 I:2\r\ndebug1: Couldn\'t stat remote file: No such file or directory\r\ndebug3: Sent message SSH2_FXP_OPEN I:3 P:/home/lukas/.ansible/tmp/ansible-tmp-1566570853.88-235437120093861/AnsiballZ_setup.py\r\ndebug3: Sent message SSH2_FXP_WRITE I:4 O:0 S:32768\r\ndebug3: SSH2_FXP_STATUS 0\r\ndebug3: In write loop, ack for 4 32768 bytes at 0\r\ndebug3: Sent message SSH2_FXP_WRITE I:5 O:32768 S:32768\r\ndebug3: Sent message SSH2_FXP_WRITE I:6 O:65536 S:32768\r\ndebug3: Sent message SSH2_FXP_WRITE I:7 O:98304 S:32768\r\ndebug3: Sent message SSH2_FXP_WRITE I:8 O:131072 S:32768\r\ndebug3: Sent message SSH2_FXP_WRITE I:9 O:163840 S:32768\r\ndebug3: Sent message SSH2_FXP_WRITE I:10 O:196608 S:32768\r\ndebug3: Sent message SSH2_FXP_WRITE I:11 O:229376 S:23124\r\ndebug3: SSH2_FXP_STATUS 0\r\ndebug3: In write loop, ack for 5 32768 bytes at 32768\r\ndebug3: SSH2_FXP_STATUS 0\r\ndebug3: In write loop, ack for 6 32768 bytes at 65536\r\ndebug3: SSH2_FXP_STATUS 0\r\ndebug3: In write loop, ack for 7 32768 bytes at 98304\r\ndebug3: SSH2_FXP_STATUS 0\r\ndebug3: In write loop, ack for 8 32768 bytes at 131072\r\ndebug3: SSH2_FXP_STATUS 0\r\ndebug3: In write loop, ack for 9 32768 bytes at 163840\r\ndebug3: SSH2_FXP_STATUS 0\r\ndebug3: In write loop, ack for 10 32768 bytes at 196608\r\ndebug3: SSH2_FXP_STATUS 0\r\ndebug3: In write loop, ack for 11 23124 bytes at 229376\r\ndebug3: Sent message SSH2_FXP_CLOSE I:4\r\ndebug3: SSH2_FXP_STATUS 0\r\ndebug3: mux_client_read_packet: read header failed: Broken pipe\r\ndebug2: Received exit status from master 0\r\n')
<123.123.123.123> ESTABLISH SSH CONNECTION FOR USER: lukas
<123.123.123.123> SSH: EXEC ssh -vvv -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="lukas"' -o ConnectTimeout=5 -o ControlPath=/home/lukas/.ansible/cp/779c431db0 123.123.123.123 '/bin/sh -c '"'"'chmod u+x /home/lukas/.ansible/tmp/ansible-tmp-1566570853.88-235437120093861/ /home/lukas/.ansible/tmp/ansible-tmp-1566570853.88-235437120093861/AnsiballZ_setup.py && sleep 0'"'"''
<123.123.123.123> (0, '', 'OpenSSH_7.2p2 Ubuntu-4ubuntu2.8, OpenSSL 1.0.2g  1 Mar 2016\r\ndebug1: Reading configuration data /etc/ssh/ssh_config\r\ndebug1: /etc/ssh/ssh_config line 19: Applying options for *\r\ndebug1: auto-mux: Trying existing master\r\ndebug2: fd 3 setting O_NONBLOCK\r\ndebug2: mux_client_hello_exchange: master version 4\r\ndebug3: mux_client_forwards: request forwardings: 0 local, 0 remote\r\ndebug3: mux_client_request_session: entering\r\ndebug3: mux_client_request_alive: entering\r\ndebug3: mux_client_request_alive: done pid = 12697\r\ndebug3: mux_client_request_session: session request sent\r\ndebug1: mux_client_request_session: master session id: 2\r\ndebug3: mux_client_read_packet: read header failed: Broken pipe\r\ndebug2: Received exit status from master 0\r\n')
<123.123.123.123> ESTABLISH SSH CONNECTION FOR USER: lukas
<123.123.123.123> SSH: EXEC ssh -vvv -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="lukas"' -o ConnectTimeout=5 -o ControlPath=/home/lukas/.ansible/cp/779c431db0 -tt 123.123.123.123 '/bin/sh -c '"'"'sudo -H -S  -p "[sudo via ansible, key=kuswqyltevcovqytnefnxinbrwvcydkq] password:" -u root /bin/sh -c '"'"'"'"'"'"'"'"'echo BECOME-SUCCESS-kuswqyltevcovqytnefnxinbrwvcydkq ; /usr/bin/python /home/lukas/.ansible/tmp/ansible-tmp-1566570853.88-235437120093861/AnsiballZ_setup.py'"'"'"'"'"'"'"'"' && sleep 0'"'"''
123.123.123.123 | FAILED! => {
    "msg": "Timeout (7s) waiting for privilege escalation prompt: \u001b[?1h\u001b=\r\r"

sshd 日志

Aug 26 13:36:19 123.123.123.123 sudo: pam_unix(sudo:auth): conversation failed
Aug 26 13:36:19 123.123.123.123 sudo: pam_unix(sudo:auth): auth could not identify password for [lukas]

【问题讨论】：

标签： ssh ansible centos sshd

【解决方案1】：

我相信您遇到的问题是您没有设置权限升级用户密码。在 Ansible 中，当我们需要 root 权限时，我们设置了 become 变量。成为root的方法可能会有所不同，您可以使用ansible_become_method来设置方法。

关于您的问题，我认为您需要在运行playbook 之前设置ansible_become_user 和ansible_become_password。您可以在您的库存中执行此操作，也可以在任何适合您的情况下执行此操作。

Here is the link to the variable list you can configure to modify how Ansible will connect to the hosts.

您可以在 Ansible Docs 的 "Understanding Privilege Escalation" 上获取有关权限提升的更多信息。

希望对你有帮助。

【讨论】：

感谢您的输入，但所描述的标志都不适合我。
什么意思？您是否尝试过配置它们？

【解决方案2】：

原来问题与PAM auth 模块有关。简而言之，我将auth sufficient pam_permit.so 行添加到/etc/pam.d/sudo 文件中。长久以来，这就是我到达solution 的方式。

请注意，PAM 失败的原因可能有上百万个，因此此解决方案可能不适合您。

$ cat /etc/pam.d/sudo

#%PAM-1.0
# Fixing "auth could not identify password for [username]" ssh problem.
auth       sufficient   pam_permit.so

# Original config below
auth       include      system-auth
account    include      system-auth
password   include      system-auth
session    optional     pam_keyinit.so revoke
session    required     pam_limits.so
session    include      system-auth

【讨论】：

【解决方案3】：

刚才我遇到了同样的问题，我的命令是

./ansible-playbook playbook.yml -i hosts -b --become-user root --extra-vars "ansible_become_pass= myPass" --become-method su

去掉空格后

"ansible_become_pass=[space]myPass" --> "ansible_become_pass=myPass"

我尝试再次执行并得到了

The authenticity of host 'localhost (::1)' can't be established.
ECDSA key fingerprint is SHA256:[random string].
Are you sure you want to continue connecting (yes/no/[fingerprint])?

我觉得很有趣？

然后我看到在执行这个剧本时我已经是root 用户所以我换了一个用户，再次尝试执行这个命令，感谢上帝，它成功了。

【讨论】：