moved ssh to cert based

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

roles/common/files/ssh/vault-ca.pub

@@ -0,0 +1 @@
+ssh-rsa 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

roles/common/tasks/sshd.yml

@@ -10,8 +10,7 @@
 
 - name: Copy pubkey
   ansible.builtin.copy:
-    content: "{{ pubkey }}"
-    dest: "/home/{{ user }}/.ssh/authorized_keys"
-    owner: "{{ user }}"
-    group: "{{ user }}"
+    src: files/ssh/vault-ca.pub
+    dest: "/etc/ssh/vault-ca.pub"
     mode: "644"
+  become: true

roles/common/templates/ssh/sshd_config

@@ -1,4 +1,3 @@
-Include /etc/ssh/sshd_config.d/*.conf
 Protocol 2
 PermitRootLogin no
 MaxAuthTries 3
@@ -13,6 +12,7 @@ X11Forwarding no
 PrintMotd no
 TCPKeepAlive no
 ClientAliveCountMax 2
+TrustedUserCAKeys /etc/ssh/vault-ca.pub
 UseDNS yes
 AcceptEnv LANG LC_*
 Subsystem	sftp	/usr/lib/openssh/sftp-server