Add: support optional Let's Encrypt TLS certs for static web sites

4 files changed, 109 insertions, 4 deletions

diff --git a/roles/apache_server/defaults/main.yml b/roles/apache_server/defaults/main.yml
index cfa797c..f130e35 100644
--- a/roles/apache_server/defaults/main.yml
+++ b/roles/apache_server/defaults/main.yml
@@ -15,3 +15,7 @@
 #         ownermail: liw@liw.fi
 
 static_sites: []
+
+
+# Enable letsencrypt?
+letsencrypt: yes
diff --git a/roles/apache_server/tasks/main.yml b/roles/apache_server/tasks/main.yml
index 0f59f67..a66f85e 100644
--- a/roles/apache_server/tasks/main.yml
+++ b/roles/apache_server/tasks/main.yml
@@ -1,9 +1,48 @@
-- name: install rsync (so one can publish files via server)
+- name: install apache and related packages
   apt:
-    name: rsync
+    name: "{{ item }}"
+  with_items:
+    - rsync
+    - apache2
 
-- name: install apache2
-  apt: name=apache2
+- name: enable apache modules for ssl
+  apache2_module:
+    state: present
+    name: "{{ item }}"
+  with_items:
+    - ssl
+    - rewrite
+
+- name: install certbot
+  apt:
+    name: certbot
+    default_release: stretch-backports
+  when: letsencrypt
+
+- name: "empty list of domains for Let's Encrypt"
+  shell: rm -f /etc/letsencrypt/static_sites/*
+
+- name: "create list of domains for static sites to get Let's Encrypt certs for"
+  shell: |
+    if [ "{{ item.letsencrypt|default(false) }}" = True ]
+    then
+        listdir="/etc/letsencrypt/static_sites"
+        mkdir -p "$listdir"
+        touch "$listdir/{{ item.domain }}"
+    fi
+  with_items: "{{ static_sites }}"
+
+- name: install script to run certbot
+  template:
+    src: deploy_static_site_certs
+    dest: /usr/local/sbin/deploy_static_site_certs
+    owner: root
+    group: root
+    mode: 755
+  when: letsencrypt
+
+- name: "get initial certificate from Let's Encrypt"
+  shell: /usr/local/sbin/deploy_static_site_certs
 
 - name: create dirs for static site contents
   file:
diff --git a/roles/apache_server/templates/deploy_static_site_certs b/roles/apache_server/templates/deploy_static_site_certs
new file mode 100644
index 0000000..32ace4e
--- /dev/null
+++ b/roles/apache_server/templates/deploy_static_site_certs
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+set -eu
+
+
+domains()
+{
+    cd /etc/letsencrypt/static_sites
+    ls
+}
+
+
+opts()
+{
+    for domain in $(domains)
+    do
+        echo -w "/srv/http/$domain" -d "$domain"
+    done
+}
+
+
+certbot certonly \
+        --noninteractive \
+        --email "{{ letsencrypt_email }}" \
+        --agree-tos \
+        --expand \
+        --webroot $(opts)
diff --git a/roles/apache_server/templates/virtualhost.conf.tmpl b/roles/apache_server/templates/virtualhost.conf.tmpl
index 1fa060a..5d06f0e 100644
--- a/roles/apache_server/templates/virtualhost.conf.tmpl
+++ b/roles/apache_server/templates/virtualhost.conf.tmpl
@@ -7,6 +7,36 @@
     DocumentRoot /srv/http/{{ item.domain }}
     ErrorLog /var/log/apache2/{{ item.domain }}/error.log
     CustomLog /var/log/apache2/{{ item.domain }}/access.log combined
+{% if item.letsencrypt|default(false) %}
+    Redirect permanent / "https://{{ item.domain }}/"
+{% else %}
+    <Directory /srv/http/{{ item.domain }}>
+
+        Options +SymlinksIfOwnerMatch +Indexes +MultiViews
+{% if item.htpasswd is defined %}
+        AuthType Basic
+        AuthName "{{ item.htpasswd_name }}"
+        AuthUserFile "/srv/http/{{ item.domain }}.htpasswd"
+        Require valid-user
+{% else %}
+        AllowOverride AuthConfig
+        Require all granted
+{% endif %}
+    </Directory>
+{% endif %}
+</VirtualHost>
+
+
+{% if item.letsencrypt|default(false) %}
+<VirtualHost _default_:443>
+    ServerName {{ item.domain }}
+{% if item.alias is defined %}
+    ServerAlias {{ item.alias }}
+{% endif %}
+    ServerAdmin {{ item.ownermail }}
+    DocumentRoot /srv/http/{{ item.domain }}
+    ErrorLog /var/log/apache2/{{ item.domain }}/error.log
+    CustomLog /var/log/apache2/{{ item.domain }}/access.log combined
     <Directory /srv/http/{{ item.domain }}>
         Options +SymlinksIfOwnerMatch +Indexes +MultiViews
 {% if item.htpasswd is defined %}
@@ -19,4 +49,9 @@
         Require all granted
 {% endif %}
     </Directory>
+
+    SSLEngine on
+    SSLCertificateFile	"/etc/letsencrypt/live/{{ letsencrypt_main_domain }}/fullchain.pem"
+    SSLCertificateKeyFile "/etc/letsencrypt/live/{{ letsencrypt_main_domain }}/privkey.pem"
 </VirtualHost>
+{% endif %}