Only modify sshd_config if it exists.

On Docker images, it might not be present, so we don't need to modify it.

Also fix a bug with "sshd_config" being used as a register twice, so the second
usage overwrites the result of the first one.

playbooks/roles/vhost/tasks/main.yml

@@ -60,7 +60,7 @@
     state: present
     regexp: "^LogLevel .*"
     line: "LogLevel VERBOSE"
-  register: sshd_config
+  register: sshd_config_line1
 
 - name: Update sshd logging to VERBOSE
   lineinfile:
@@ -68,18 +68,22 @@
     state: present
     regexp: "^PasswordAuthentication .*"
     line: "PasswordAuthentication {{ COMMON_SSH_PASSWORD_AUTH }}"
-  register: sshd_config
+  register: sshd_config_line2
 
 - name: Restart ssh
   service:
     name: ssh
     state: restarted
   become: True
-  when: sshd_config.changed and ansible_distribution in common_debian_variants
+  when: >
+    (sshd_config_line1.changed or sshd_config_line2.changed) and
+    ansible_distribution in common_debian_variants
 
 - name: Restart ssh
   service:
     name: sshd
     state: restarted
   become: True
-  when: sshd_config.changed and ansible_distribution in common_redhat_variants
+  when: >
+    (sshd_config_line1.changed or sshd_config_line2.changed) and
+    ansible_distribution in common_redhat_variants

playbooks/roles/vhost/templates/etc/ssh/sshd_config.j2

-# {{ ansible_managed }}
-#
-# Changes from the default Ubuntu ssh config:
-#  - LogLevel set to VERBOSE
-#
-
-# What ports, IPs and protocols we listen for
-Port 22
-# Use these options to restrict which interfaces/protocols sshd will bind to
-#ListenAddress ::
-#ListenAddress 0.0.0.0
-Protocol 2
-# HostKeys for protocol version 2
-HostKey /etc/ssh/ssh_host_rsa_key
-HostKey /etc/ssh/ssh_host_dsa_key
-HostKey /etc/ssh/ssh_host_ecdsa_key
-#Privilege Separation is turned on for security
-UsePrivilegeSeparation yes
-
-# Lifetime and size of ephemeral version 1 server key
-KeyRegenerationInterval 3600
-ServerKeyBits 768
-
-# Logging
-SyslogFacility AUTH
-LogLevel VERBOSE
-
-# Authentication:
-LoginGraceTime 120
-PermitRootLogin yes
-StrictModes yes
-
-RSAAuthentication yes
-PubkeyAuthentication yes
-#AuthorizedKeysFile     %h/.ssh/authorized_keys
-
-# Don't read the user's ~/.rhosts and ~/.shosts files
-IgnoreRhosts yes
-# For this to work you will also need host keys in /etc/ssh_known_hosts
-RhostsRSAAuthentication no
-# similar for protocol version 2
-HostbasedAuthentication no
-# Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication
-#IgnoreUserKnownHosts yes
-
-# To enable empty passwords, change to yes (NOT RECOMMENDED)
-PermitEmptyPasswords no
-
-# Change to yes to enable challenge-response passwords (beware issues with
-# some PAM modules and threads)
-ChallengeResponseAuthentication no
-
-# Change to no to disable tunnelled clear text passwords
-PasswordAuthentication {{ COMMON_SSH_PASSWORD_AUTH }}
-
-# Kerberos options
-#KerberosAuthentication no
-#KerberosGetAFSToken no
-#KerberosOrLocalPasswd yes
-#KerberosTicketCleanup yes
-
-# GSSAPI options
-#GSSAPIAuthentication no
-#GSSAPICleanupCredentials yes
-
-X11Forwarding yes
-X11DisplayOffset 10
-PrintMotd no
-PrintLastLog yes
-TCPKeepAlive yes
-#UseLogin no
-
-#MaxStartups 10:30:60
-#Banner /etc/issue
-
-# Allow client to pass locale environment variables
-AcceptEnv LANG LC_*
-
-Subsystem sftp /usr/lib/openssh/sftp-server
-
-# Set this to 'yes' to enable PAM authentication, account processing,
-# and session processing. If this is enabled, PAM authentication will
-# be allowed through the ChallengeResponseAuthentication and
-# PasswordAuthentication.  Depending on your PAM configuration,
-# PAM authentication via ChallengeResponseAuthentication may bypass
-# the setting of "PermitRootLogin without-password".
-# If you just want the PAM account and session checks to run without
-# PAM authentication, then enable this but set PasswordAuthentication
-# and ChallengeResponseAuthentication to 'no'.
-UsePAM yes