Initial commit

ansible/01-initial_setup.yml

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+- name: Initial System Setup
+  hosts: mx1
+  remote_user: root
+  become: true
+  become_method: su
+  vars_files:
+    - vars.yml
+  tasks:
+    - name: Apply all available system patches
+      command: syspatch
+      register: syspatch
+      failed_when: syspatch.rc != 0 and syspatch.rc != 2
+      changed_when: syspatch.rc == 0
+
+    - name: Update package list and upgrade all packages
+      command: pkg_add -u
+
+    - name: Install essential packages
+      community.general.openbsd_pkg:
+        name:
+          - nano
+          - curl
+          - git
+        state: present
+
+    - name: Disable SSH password authentication
+      ansible.builtin.lineinfile:
+        path: /etc/ssh/sshd_config
+        regexp: "^#?PasswordAuthentication"
+        line: "PasswordAuthentication no"
+        state: present
+
+    - name: Restart SSH service to apply changes
+      ansible.builtin.service:
+        name: sshd
+        state: restarted
+
+    - name: Add SSH public key to authorized_keys
+      ansible.posix.authorized_key:
+        user: root
+        key: "{{ ssh_public_key }}"

ansible/02-ssl.yml

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+- name: SSL Setup
+  hosts: mx1
+  remote_user: root
+  vars_files:
+    - vars.yml
+  tasks:
+    - name: Create vhost directories
+      file:
+        path: "/var/www/vhosts/{{ item }}"
+        state: directory
+        owner: www
+      with_items: "{{ mx1_domains }}"
+
+    - name: Install httpd.conf
+      template:
+        src: "templates/httpd.conf"
+        dest: "/etc/httpd.conf"
+
+    - name: Enable and start httpd
+      service:
+        name: httpd
+        enabled: yes
+        state: started
+
+    - name: Install acme-client.conf
+      template:
+        src: "templates/acme-client.conf"
+        dest: "/etc/acme-client.conf"
+
+    - name: Initial acme-client run
+      command: "/usr/sbin/acme-client {{ item }}"
+      args:
+        creates: "/etc/ssl/{{ item }}.fullchain.pem"
+      with_items: "{{ mx1_domains }}"
+      notify:
+        - reload httpd
+
+    - name: Renew certificates via root crontab
+      cron:
+        name: "acme-client renew {{ item }}"
+        minute: "0"
+        job: "sleep $((RANDOM \\% 2048)) && acme-client {{ item }} && rcctl reload httpd"
+        user: root
+      with_items: "{{ mx1_domains }}"
+
+  handlers:
+    - name: reload httpd
+      service:
+        name: httpd
+        state: reloaded

ansible/03-mail.yml

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+- name: OpenSMTPD Installation and Configuration
+  hosts: mx1
+  remote_user: root
+  vars_files:
+    - vars.yml
+  tasks:
+    - name: Install Packages
+      community.general.openbsd_pkg:
+        name:
+          - opensmtpd-filter-dkimsign
+          - dovecot
+          - dovecot-pigeonhole
+          - opensmtpd-extras
+        state: present
+
+    - name: Create the vmail group
+      group:
+        name: vmail
+        gid: 2000
+
+    - name: Create vmail user
+      user:
+        name: vmail
+        group: vmail
+        shell: /sbin/nologin
+        createhome: yes
+        home: /var/mail/vmail
+        uid: 2000
+
+    - name: Generate dkim keys
+      shell: |
+        KEYLEN=1024
+        DOMAIN={{ mx1_mail_domain }}
+
+        mkdir -p /etc/mail/dkim
+        if [ -f /etc/mail/dkim/$DOMAIN.key ]; then
+          echo "$DOMAIN.key already exists."
+          exit 0
+        fi
+
+        cd /etc/mail/dkim
+        (umask 337; openssl genrsa -out $DOMAIN.key $KEYLEN)
+        openssl rsa -in $DOMAIN.key -pubout -out $DOMAIN.pub
+        group info _dkimsign >/dev/null && chgrp _dkimsign $DOMAIN.key
+        echo "add the $DOMAIN.dns to the zone file"
+        echo "selector1._domainkey.$DOMAIN. 3600 IN TXT \"v=DKIM1; k=rsa; p=$(sed -e '1d' -e '$d' $DOMAIN.pub | tr -d '\n')\"" > ~/$DOMAIN.dns
+
+    - name: Configure OpenSMTPD smtpd.conf
+      template:
+        src: "templates/smtpd.conf"
+        dest: /etc/mail/smtpd.conf
+      notify:
+        - reload smtpd
+
+    - name: Enable and start OpenSMTPD service
+      service:
+        name: smtpd
+        enabled: yes
+        state: started
+
+    - name: Delete default dovecot configs
+      shell: |
+        if [ -f /etc/dovecot/conf.d/10-ssl.conf ]; then
+          cd /etc/dovecot/
+          rm -rf *
+        fi
+
+    - name: Install dovecot.conf
+      template:
+        src: "templates/dovecot.conf"
+        dest: "/etc/dovecot/dovecot.conf"
+      notify:
+        - reload dovecot
+
+    - name: Configure users
+      block:
+        - name: Remove existing
+          shell: |
+            echo "" > /etc/dovecot/users
+            chmod 640 /etc/dovecot/users
+            chown _smtpd:_dovecot /etc/dovecot/users
+
+            echo "" > /etc/mail/accounts
+            chmod 640 /etc/mail/accounts
+            chown _smtpd: /etc/mail/accounts
+
+            echo "" > /etc/mail/virtuals
+            chown _smtpd: /etc/mail/virtuals
+
+        - name: Add user accounts
+          loop: "{{ mail_users }}"
+          no_log: true
+          shell: |
+            DOVECOT_PASS=$(doveadm pw -p {{ item.password }})
+            SMTP_PASS=$(smtpctl encrypt {{ item.password }})
+
+            echo "{{ item.user }}:$DOVECOT_PASS::::" >> /etc/dovecot/users
+            echo "{{ item.user }}:$SMTP_PASS::::" >> /etc/mail/accounts
+
+        - name: Install dovecot.conf
+          template:
+            src: "templates/virtuals.conf"
+            dest: "/etc/mail/virtuals"
+
+    - name: Enable dovecot service
+      service:
+        name: dovecot
+        enabled: true
+        state: started
+
+  handlers:
+    - name: reload smtpd
+      service:
+        name: smtpd
+        state: restarted
+
+    - name: reload dovecot
+      service:
+        name: dovecot
+        state: reloaded

ansible/templates/acme-client.conf

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+authority letsencrypt {
+    api url "https://acme-v02.api.letsencrypt.org/directory"
+    account key "/etc/acme/letsencrypt-privkey.pem"
+}
+
+{% for domain in mx1_domains %}
+domain "{{ domain }}" {
+    domain key "/etc/ssl/private/{{ domain }}.key"
+    domain full chain certificate "/etc/ssl/{{ domain }}.fullchain.pem"
+    sign with letsencrypt
+}
+{% endfor %}

ansible/templates/dovecot.conf

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+# Enable ssl
+ssl = required
+ssl_cert = < /etc/ssl/{{ mx1_mail_domain }}.fullchain.pem
+ssl_key = < /etc/ssl/private/{{ mx1_mail_domain }}.key
+
+ssl_min_protocol = TLSv1.2
+ssl_prefer_server_ciphers = yes
+
+disable_plaintext_auth = yes
+
+# Define used protocols
+protocols = lmtp imap sieve
+
+service lmtp {
+    unix_listener lmtp {
+        user  = vmail
+        group = vmail
+    }
+}
+
+service imap-login {
+    inet_listener imap {
+        port = 143
+    }
+    inet_listener imaps {
+        port = 993
+    }
+}
+
+# Setup users
+passdb {
+    driver = passwd-file
+    args = scheme=ARGON2ID-CRYPT username_format=%u /etc/dovecot/users
+}
+
+userdb {
+    driver = passwd-file
+    args = username_format=%u /etc/dovecot/users
+    override_fields = uid=vmail gid=vmail home=/var/mail/vmail/%d/%n
+}
+
+# Setup mail location
+mail_location = maildir:~/Maildir
+
+# setup auth listener
+service auth {
+ unix_listener auth-userdb {
+  mode = 0660
+  user = vmail
+  group = vmail
+ }
+}
+
+# change the authworker to run as non-root
+service auth-worker {
+ user = $default_internal_user
+}
+
+# setup local delivery options
+quota_full_tempfail = yes
+protocol lda {
+ mail_plugins = $mail_plugins sieve
+}
+# setup some common mailboxes that are used by different clients to consistent destinations
+namespace inbox {
+ inbox = yes
+ mailbox Spam {
+  special_use = \Junk
+ }
+ mailbox "Deleted Items" {
+  special_use = \Trash
+ }
+}
+
+# setup local delivery protocol
+protocol lmtp {
+ mail_plugins = $mail_plugins sieve
+}
+
+# disable verify quota befor replying rcpt to
+lmtp_rcpt_check_quota = no
+
+# setup stats service
+service stats {
+ unix_listener stats-writer {
+  user =
+  group = $default_internal_group
+  mode = 0660
+ }
+}
+
+# enable mail plugins
+mail_plugins = $mail_plugins notify
+
+# setup metrics
+metric auth_success {
+ filter = event=auth_request_finished AND success=yes
+}
+metric auth_failures {
+ filter = event=auth_request_finished AND NOT success=yes
+}
+metric imap_command {
+ filter = event=imap_command_finished
+ group_by = cmd_name tagged_reply_state
+}
+metric smtp_command {
+ filter = event=smtp_server_command_finished
+ group_by = cmd_name status_code duration:exponential:1:5:10
+}
+metric mail_delivery {
+ filter = event=mail_delivery_finsihed
+ group_by = duration:exponential:1:5:10
+}
+
+# enable IMAP protocol
+protocol imap {
+ mail_plugins = $mail_plugins imap_sieve
+}
+
+# setup sieve plugin options
+# enable if there needs to be default sieve processing
+#plugin {
+#  sieve_pipe_bin_dir = /usr/local/lib/dovecot/sieve
+#  sieve_before = /etc/dovecot/sieve/default.sieve
+#  sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment
+#  sieve_plugins = sieve_imapsieve sieve_extprograms
+#}

ansible/templates/httpd.conf

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+server "{{ inventory_hostname }}" {
+    listen on * port 80
+    location "/.well-known/acme-challenge/*" {
+        root "/acme"
+        request strip 2
+    }
+    location * {
+        block return 302 "https://$HTTP_HOST$REQUEST_URI"
+    }
+}
+
+{% for vhost in mx1_domains %}
+server "{{ vhost }}" {
+    listen on * tls port 443
+    tls {
+        certificate "/etc/ssl/{{ vhost }}.fullchain.pem"
+        key "/etc/ssl/private/{{ vhost }}.key"
+    }
+    location "/.well-known/acme-challenge/*" {
+        root "/acme"
+        request strip 2
+    }
+    location * {
+        root "/vhosts/{{ vhost }}"
+    }
+}
+{% endfor %}

ansible/templates/smtpd.conf

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+pki {{ mx1_mail_domain }} cert "/etc/ssl/{{ mx1_mail_domain }}.fullchain.pem"
+pki {{ mx1_mail_domain }} key "/etc/ssl/private/{{ mx1_mail_domain }}.key"
+
+table aliases file:/etc/mail/aliases
+table users passwd:/etc/mail/accounts
+table virtuals file:/etc/mail/virtuals
+
+filter dkimsign_rsa proc-exec "filter-dkimsign -d {{ mx1_mail_domain }} -s selector1 \
+    -k /etc/mail/dkim/{{ mx1_mail_domain }}.key" user _dkimsign group _dkimsign
+
+listen on socket filter dkimsign_rsa
+listen on all tls pki {{ mx1_mail_domain }}
+listen on all port submission tls-require pki {{ mx1_mail_domain }} auth <users> filter dkimsign_rsa
+listen on all port smtps tls-require pki {{ mx1_mail_domain }} auth <users> filter dkimsign_rsa
+
+action "local_mail" lmtp "/var/dovecot/lmtp" rcpt-to virtual <virtuals>
+action "outbound" relay
+
+{% for domain in mail_domains %}
+match from any for domain {{ domain }} action "local_mail"
+{% endfor %}
+match from local for local action "local_mail"
+match from local for any action "outbound"

ansible/templates/virtuals.conf

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+{% for user in mail_users %}
+{{ user.user }}: vmail
+{% if (user.virtuals is defined) and user.virtuals %}
+{% for virtual in user.virtuals %}
+{{ virtual }}: {{ user.user }}
+{% endfor %}
+{% endif %}
+{% endfor %}