refactor sshd into a role

deploy.yml

@@ -4,6 +4,7 @@
   become_method: doas
   roles:
     - basic
+    - sshd
   post_tasks:
     - name: lbu commit
       lbu:

roles/basic/tasks/main.yml

@@ -16,18 +16,3 @@
     groups:
       - rilla
       - wheel
-
-- name: set rilla's authorized key
-  authorized_key:
-    user: rilla
-    key: '{{ item }}'
-    path: /home/rilla/.ssh/authorized_keys
-  with_file:
-    - public_keys/yubikey
-  register: ssh_keys
-
-- name: commit ssh public keys with lbu
-  lbu:
-    include:
-      - /home/rilla/.ssh/authorized_keys
-  when: ansible_distribution == "Alpine" and ssh_keys.changed

roles/sshd/tasks/alpine.yml

@@ -0,0 +1,15 @@
+- name: commit ssh public keys with lbu
+  lbu:
+    include:
+      - /home/rilla/.ssh/authorized_keys
+  when: ssh_keys.changed
+
+- name: install openssh
+  apk:
+    name: openssh
+
+- name: enable sshd service
+  service:
+    name: sshd
+    enabled: yes
+    state: started

roles/sshd/tasks/main.yml

@@ -0,0 +1,20 @@
+- name: set rilla's authorized key
+  authorized_key:
+    user: rilla
+    key: '{{ item }}'
+    path: /home/rilla/.ssh/authorized_keys
+  with_file:
+    - public_keys/yubikey
+  register: ssh_keys
+
+- name: set sshd config
+  template:
+    src: sshd_config.j2
+    dest: /etc/ssh/sshd_config
+    mode: '0644'
+    owner: root
+    group: wheel
+
+- name: setup alpine ssh
+  include_tasks: alpine.yml
+  when: ansible_distribution == "Alpine"

roles/sshd/templates/sshd_config.j2

@@ -0,0 +1,121 @@
+#	$OpenBSD: sshd_config,v 1.104 2021/07/02 05:11:21 dtucker Exp $
+
+# This is the sshd server system-wide configuration file.  See
+# sshd_config(5) for more information.
+
+# This sshd was compiled with PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+
+# The strategy used for options in the default sshd_config shipped with
+# OpenSSH is to specify options with their default value where
+# possible, but leave them commented.  Uncommented options override the
+# default value.
+
+Port 22
+#AddressFamily any
+#ListenAddress 0.0.0.0
+#ListenAddress ::
+
+#HostKey /etc/ssh/ssh_host_rsa_key
+#HostKey /etc/ssh/ssh_host_ecdsa_key
+#HostKey /etc/ssh/ssh_host_ed25519_key
+
+# Ciphers and keying
+#RekeyLimit default none
+
+# Logging
+#SyslogFacility AUTH
+#LogLevel INFO
+
+# Authentication:
+
+#LoginGraceTime 2m
+PermitRootLogin no
+#StrictModes yes
+#MaxAuthTries 6
+#MaxSessions 10
+
+PubkeyAuthentication yes
+
+# The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2
+# but this is overridden so installations will only check .ssh/authorized_keys
+AuthorizedKeysFile	.ssh/authorized_keys
+
+#AuthorizedPrincipalsFile none
+
+#AuthorizedKeysCommand none
+#AuthorizedKeysCommandUser nobody
+
+# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
+#HostbasedAuthentication no
+# Change to yes if you don't trust ~/.ssh/known_hosts for
+# HostbasedAuthentication
+#IgnoreUserKnownHosts no
+# Don't read the user's ~/.rhosts and ~/.shosts files
+#IgnoreRhosts yes
+
+# To disable tunneled clear text passwords, change to no here!
+PasswordAuthentication no
+#PermitEmptyPasswords no
+
+# Change to no to disable s/key passwords
+#KbdInteractiveAuthentication yes
+
+# Kerberos options
+#KerberosAuthentication no
+#KerberosOrLocalPasswd yes
+#KerberosTicketCleanup yes
+#KerberosGetAFSToken no
+
+# GSSAPI options
+#GSSAPIAuthentication no
+#GSSAPICleanupCredentials yes
+
+# Set this to 'yes' to enable PAM authentication, account processing,
+# and session processing. If this is enabled, PAM authentication will
+# be allowed through the KbdInteractiveAuthentication and
+# PasswordAuthentication.  Depending on your PAM configuration,
+# PAM authentication via KbdInteractiveAuthentication 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 KbdInteractiveAuthentication to 'no'.
+#UsePAM no
+
+#AllowAgentForwarding yes
+# Feel free to re-enable these if your use case requires them.
+AllowTcpForwarding no
+GatewayPorts no
+X11Forwarding no
+#X11DisplayOffset 10
+#X11UseLocalhost yes
+#PermitTTY yes
+#PrintMotd yes
+#PrintLastLog yes
+#TCPKeepAlive yes
+#PermitUserEnvironment no
+#Compression delayed
+#ClientAliveInterval 0
+#ClientAliveCountMax 3
+#UseDNS no
+#PidFile /run/sshd.pid
+#MaxStartups 10:30:100
+#PermitTunnel no
+#ChrootDirectory none
+#VersionAddendum none
+
+# no default banner path
+#Banner none
+
+# override default of no subsystems
+{% if ansible_distribution == "OpenBSD" %}
+Subsystem       sftp    /usr/libexec/sftp-server
+{% else %}
+Subsystem	sftp	/usr/lib/ssh/sftp-server
+{% endif %}
+
+# Example of overriding settings on a per-user basis
+#Match User anoncvs
+#	X11Forwarding no
+#	AllowTcpForwarding no
+#	PermitTTY no
+#	ForceCommand cvs server