00_preps.yaml

@@ -22,3 +22,22 @@
       become: true
       user:
         name: git
+        groups:
+          - lxd
+    - name: PREPS -- git authorized keys
+      copy:
+        src: 'files/sshd_config'
+        dest: '/etc/ssh/sshd_config'
+        mode: 0644
+      notify:
+        - reload sshd
+    - name: PREPS -- git host shim
+      copy:
+        src: 'files/git_host_shim'
+        dest: '/usr/local/bin/gitea'
+        mode: 0755
+  handlers:
+    - name: reload sshd
+      service:
+        name: sshd
+        state: reloaded

02_lxc_containers.yaml

@@ -33,12 +33,3 @@
             listen: tcp:0.0.0.0:443
             connect: tcp:127.0.0.1:443
             proxy_protocol: 'true'
-    - name: Create gitea port forward(s)
-      community.general.lxd_container:
-        name: gitea
-        devices:
-          map_port_2222:
-            type: proxy
-            listen: tcp:0.0.0.0:2222
-            connect: tcp:127.0.0.1:2222
-            proxy_protocol: 'true'

04_container_gitea.yaml

@@ -18,3 +18,9 @@
       ENABLE_AUTO_REGISTRATION = true
       USERNAME = email
       ACCOUNT_LINKING = auto
+    gitea_extra_config: |
+      [server]
+      SSH_PORT = 22
+      SSH_LISTEN_PORT = 2222
+      SSH_USER = git
+      BUILTIN_SSH_SERVER_USER = git

files/git_host_shim

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+/snap/bin/lxc exec --cwd /var/lib/gitea --env SSH_ORIGINAL_COMMAND="$SSH_ORIGINAL_COMMAND" gitea -- sudo -HE --user gitea $0 "$@"

files/sshd_config

@@ -0,0 +1,128 @@
+#	$OpenBSD: sshd_config,v 1.103 2018/04/09 20:41:22 tj Exp $
+
+# This is the sshd server system-wide configuration file.  See
+# sshd_config(5) for more information.
+
+# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin
+
+# 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.
+
+Include /etc/ssh/sshd_config.d/*.conf
+
+#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 prohibit-password
+#StrictModes yes
+#MaxAuthTries 6
+#MaxSessions 10
+
+#PubkeyAuthentication yes
+
+# Expect .ssh/authorized_keys2 to be disregarded by default in future.
+#AuthorizedKeysFile	.ssh/authorized_keys .ssh/authorized_keys2
+
+#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 yes
+#PermitEmptyPasswords no
+
+# Change to yes to enable challenge-response passwords (beware issues with
+# some PAM modules and threads)
+ChallengeResponseAuthentication no
+
+# Kerberos options
+#KerberosAuthentication no
+#KerberosOrLocalPasswd yes
+#KerberosTicketCleanup yes
+#KerberosGetAFSToken no
+
+# GSSAPI options
+#GSSAPIAuthentication no
+#GSSAPICleanupCredentials yes
+#GSSAPIStrictAcceptorCheck yes
+#GSSAPIKeyExchange no
+
+# 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
+
+#AllowAgentForwarding yes
+#AllowTcpForwarding yes
+#GatewayPorts no
+X11Forwarding yes
+#X11DisplayOffset 10
+#X11UseLocalhost yes
+#PermitTTY yes
+PrintMotd no
+#PrintLastLog yes
+#TCPKeepAlive yes
+#PermitUserEnvironment no
+#Compression delayed
+#ClientAliveInterval 0
+#ClientAliveCountMax 3
+#UseDNS no
+#PidFile /var/run/sshd.pid
+#MaxStartups 10:30:100
+#PermitTunnel no
+#ChrootDirectory none
+#VersionAddendum none
+
+# no default banner path
+#Banner none
+
+# Allow client to pass locale environment variables
+AcceptEnv LANG LC_*
+
+# override default of no subsystems
+Subsystem sftp	/usr/lib/openssh/sftp-server
+
+# Example of overriding settings on a per-user basis
+#Match User anoncvs
+#	X11Forwarding no
+#	AllowTcpForwarding no
+#	PermitTTY no
+#	ForceCommand cvs server
+PasswordAuthentication yes
+
+Match User git
+	AuthorizedKeysCommandUser root
+	AuthorizedKeysCommand /snap/bin/lxc exec gitea -- sudo --user gitea /usr/local/bin/gitea keys -e git -u "%u" -t "%t" -k "%k" -c /etc/gitea/gitea.ini