roles/nginx: Switch to acme.sh for Let's Encrypt
The certbot-auto client that I've been using for a long time is now only supported if you install it using snap. I don't use snap on my systems so I decided to switch to the acme.sh client, which is imp- lemented in POSIX shell with no dependencies. One bonus of this is that I can start using ECC certificates. This also configures the .well-known directory so we can use webroot when installing and renewing certificates. I have yet to understand how the renewal works with regards to webroot, though. I may have to update the systemd timers to point to /var/lib/letsencrypt/.well-known.
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@ -25,10 +25,13 @@ nginx_ssl_stapling_resolver: '1.1.1.1 1.0.0.1 [2606:4700:4700::1111] [2606:4700:
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use_letsencrypt: True
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# Directory root for Let's Encrypt certs
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letsencrypt_root: /etc/letsencrypt/live
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letsencrypt_root: /etc/ssl
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# Location of Let's Encrypt's certbot script
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letsencrypt_certbot_dest: /opt/certbot-auto
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# Location where to save initial acme.sh script. After installation the script
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# will automatically create its home in the /root/.acme.sh directory (including
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# a copy of the script itself).
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letsencrypt_acme_script: /root/acme.sh
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letsencrypt_acme_home: /root/.acme.sh
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# stable is 1.18.x
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# mainline is 1.19.x
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@ -1,135 +1,53 @@
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---
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# Use acme.sh instead of certbot because they only support installation via
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# snap now.
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- block:
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- name: Remove certbot
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apt: name=certbot state=absent
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- name: Remove old certbot post and pre hooks for nginx
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file: dest={{ item }} state=absent
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with_items:
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- /etc/letsencrypt/renewal-hooks/pre/stop-nginx.sh
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- /etc/letsencrypt/renewal-hooks/post/start-nginx.sh
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- name: Download acme.sh
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get_url:
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url: https://raw.githubusercontent.com/acmesh-official/acme.sh/master/acme.sh
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dest: "{{ letsencrypt_acme_script }}"
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- name: Prepare Let's Encrypt well-known directory
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file:
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state: directory
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path: /var/lib/letsencrypt/.well-known
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owner: root
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group: nginx
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mode: g+s
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- name: Copy systemd service to renew Let's Encrypt certs
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template: src=renew-letsencrypt.service.j2 dest=/etc/systemd/system/renew-letsencrypt.service mode=0644 owner=root group=root
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template:
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src: renew-letsencrypt.service.j2
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dest: /etc/systemd/system/renew-letsencrypt.service
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mode: 0644
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owner: root
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group: root
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- name: Copy systemd timer to renew Let's Encrypt certs
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copy: src=renew-letsencrypt.timer dest=/etc/systemd/system/renew-letsencrypt.timer mode=0644 owner=root group=root
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copy:
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src: renew-letsencrypt.timer
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dest: /etc/systemd/system/renew-letsencrypt.timer
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mode: 0644
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owner: root
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group: root
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# always issues daemon-reload just in case the server/timer changed
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# always issues daemon-reload just in case the service/timer changed
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- name: Start and enable systemd timer to renew Let's Encrypt certs
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systemd: name=renew-letsencrypt.timer state=started enabled=yes daemon_reload=yes
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- name: Download certbot
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get_url: dest={{ letsencrypt_certbot_dest }} url=https://dl.eff.org/certbot-auto mode=700
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# Dependencies certbot checks for on its first run. I set them in a fact so that
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# I can pass the list directly to the apt module to install in one transaction.
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- name: Set certbot dependencies (Debian 10)
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when: ansible_distribution == 'Debian' and ansible_distribution_major_version is version('10', '==')
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set_fact:
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certbot_dependencies:
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- augeas-lenses
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- binutils
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- binutils-common
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- binutils-x86-64-linux-gnu
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- cpp
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- cpp-8
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- gcc
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- gcc-8
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- libasan5
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- libatomic1
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- libaugeas0
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- libbinutils
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- libc-dev-bin
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- libc6-dev
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- libcc1-0
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- libexpat1-dev
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- libffi-dev
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- libgcc-8-dev
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- libgomp1
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- libisl19
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- libitm1
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- liblsan0
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- libmpc3
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- libmpfr6
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- libmpx2
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- libpython-dev
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- libpython2-dev
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- libpython2.7
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- libpython2.7-dev
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- libquadmath0
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- libssl-dev
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- libtsan0
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- libubsan1
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- linux-libc-dev
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- python-dev
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- python-pip-whl
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- python-pkg-resources
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- python-virtualenv
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- python2-dev
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- python2.7-dev
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- python3-distutils
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- python3-lib2to3
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- python3-virtualenv
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- virtualenv
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# Dependencies certbot checks for on its first run. I set them in a fact so that
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# I can pass the list directly to the apt module to install in one transaction.
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- name: Set certbot dependencies (Ubuntu 18.04)
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when: ansible_distribution == 'Ubuntu' and ansible_distribution_version is version('18.04', '==')
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set_fact:
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certbot_dependencies:
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- augeas-lenses
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- binutils
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- binutils-common
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- binutils-x86-64-linux-gnu
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- cpp
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- cpp-7
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- gcc
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- gcc-7
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- gcc-7-base
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- libasan4
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- libatomic1
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- libaugeas0
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- libbinutils
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- libc-dev-bin
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- libc6-dev
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- libcc1-0
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- libcilkrts5
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- libexpat1-dev
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- libffi-dev
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- libgcc-7-dev
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- libgomp1
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- libisl19
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- libitm1
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- liblsan0
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- libmpc3
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- libmpx2
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- libpython-dev
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- libpython2.7
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- libpython2.7-dev
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- libquadmath0
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- libssl-dev
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- libtsan0
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- libubsan0
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- linux-libc-dev
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- python-dev
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- python-pip-whl
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- python-pkg-resources
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- python-virtualenv
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- python2.7-dev
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- python3-virtualenv
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- virtualenv
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- name: Install certbot dependencies
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apt: name={{ certbot_dependencies }} state=present update_cache=yes
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when: ansible_distribution != 'Ubuntu' and ansible_distribution_major_version is version('20.04', '!=')
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tags: letsencrypt
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# On Ubuntu 20.04 it is no longer recommended/supported to use the standalone
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# certbot-auto so I guess we need to use the one from the repositories.
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- block:
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- name: Install certbot (Ubuntu 20.04)
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apt: name=certbot state=present update_cache=yes
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- name: Copy certbot post and pre hooks for nginx
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copy: src={{ item.src }} dest={{ item.dest }} owner=root group=root mode=0755
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with_items:
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- { src: 'stop-nginx.sh', dest: '/etc/letsencrypt/renewal-hooks/pre/stop-nginx.sh' }
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- { src: 'start-nginx.sh', dest: '/etc/letsencrypt/renewal-hooks/post/start-nginx.sh' }
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systemd:
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name: renew-letsencrypt.timer
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state: started
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enabled: yes
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daemon_reload: yes
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when: ansible_distribution == 'Ubuntu' and ansible_distribution_version is version('20.04', '==')
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tags: letsencrypt
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@ -71,7 +71,7 @@
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- name: Configure Let's Encrypt
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include_tasks: letsencrypt.yml
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when: use_letsencrypt is defined and use_letsencrypt
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#when: use_letsencrypt is defined and use_letsencrypt
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tags: letsencrypt
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# vim: set ts=2 sw=2:
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@ -16,8 +16,8 @@
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# concatenated key + cert
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# See: http://nginx.org/en/docs/http/configuring_https_servers.html
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ssl_certificate {{ letsencrypt_root }}/{{ domain_name }}/fullchain.pem;
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ssl_certificate_key {{ letsencrypt_root }}/{{ domain_name }}/privkey.pem;
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ssl_certificate {{ letsencrypt_root }}/certs/{{ domain_name }}.fullchain.pem;
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ssl_certificate_key {{ letsencrypt_root }}/private/{{ domain_name }}.key.pem;
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{% endif %}
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@ -1,7 +1,9 @@
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[Unit]
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Description=Renew Let's Encrypt certificates
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ConditionFileIsExecutable={{ letsencrypt_certbot_dest }}
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ConditionFileIsExecutable={{ letsencrypt_acme_home }}/acme.sh
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[Service]
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Type=oneshot
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ExecStart={{ letsencrypt_certbot_dest }} renew --standalone --pre-hook "/bin/systemctl stop nginx" --post-hook "/bin/systemctl start nginx"
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ExecStart={{ letsencrypt_acme_home }}/acme.sh --cron --home {{ letsencrypt_acme_home }} --reloadcmd "/bin/systemctl reload nginx"
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SuccessExitStatus=0 2
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@ -14,6 +14,8 @@ server {
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listen [::]:80;
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server_name {{ domain_name }} {{ domain_aliases }};
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{% include 'well-known.j2' %}
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# redirect http -> https
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location / {
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# ? in rewrite makes sure nginx doesn't append query string again
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@ -0,0 +1,6 @@
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location ^~ /.well-known/acme-challenge/ {
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allow all;
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root /var/lib/letsencrypt/;
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default_type "text/plain";
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try_files $uri =404;
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}
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