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impress/deploy/setup.yml

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---
- name: Set up the environment for the impress app
hosts: webserver
become: yes
become_user: root
vars:
email_address: "emi@matchu.dev" # TODO: Extract this to personal config?
impress_hostname: beta.impress.openneo.net
tasks:
- name: Create SSH folder for logged-in user
become: no
file:
name: .ssh
mode: "700"
state: directory
- name: Copy authorized SSH keys to logged-in user
become: no
copy:
dest: ~/.ssh/authorized_keys
src: files/authorized-ssh-keys.txt
mode: "600"
- name: Disable root SSH login
lineinfile:
dest: /etc/ssh/sshd_config
regexp: ^#?PermitRootLogin
line: PermitRootLogin no
- name: Disable password-based SSH authentication
lineinfile:
dest: /etc/ssh/sshd_config
regexp: ^#?PasswordAuthentication
line: PasswordAuthentication no
- name: Enable public-key SSH authentication
lineinfile:
dest: /etc/ssh/sshd_config
regexp: ^#?PubkeyAuthentication
line: PubkeyAuthentication yes
- name: Update the apt cache
apt:
update_cache: yes
- name: Install fail2ban firewall with default settings
apt:
name: fail2ban
- name: Configure ufw firewall to allow SSH connections on port 22
community.general.ufw:
rule: allow
port: "22"
- name: Configure ufw firewall to allow HTTP connections on port 80
community.general.ufw:
rule: allow
port: "80"
- name: Configure ufw firewall to allow HTTPS connections on port 443
community.general.ufw:
rule: allow
port: "443"
- name: Enable ufw firewall with all other ports closed by default
community.general.ufw:
state: enabled
policy: deny
- name: Install unattended-upgrades
apt:
name: unattended-upgrades
- name: Enable unattended-upgrades to auto-upgrade our system
copy:
content: |
APT::Periodic::Update-Package-Lists "1";
APT::Periodic::Unattended-Upgrade "1";
dest: /etc/apt/apt.conf.d/20auto-upgrades
- name: Configure unattended-upgrades to auto-reboot our server when necessary
lineinfile:
regex: ^(//\s*)?Unattended-Upgrade::Automatic-Reboot ".*";$
line: Unattended-Upgrade::Automatic-Reboot "true";
dest: /etc/apt/apt.conf.d/50unattended-upgrades
- name: Configure unattended-upgrades to delay necessary reboots to 3am
lineinfile:
regex: ^(//\s*)?Unattended-Upgrade::Automatic-Reboot-Time ".*";$
line: Unattended-Upgrade::Automatic-Reboot-Time "03:00";
dest: /etc/apt/apt.conf.d/50unattended-upgrades
- name: Configure the system timezone to be US Pacific time
community.general.timezone:
name: America/Los_Angeles
- name: Create "impress" user
user:
name: impress
comment: Impress App
create_home: false
- name: Create "impress-deployers" group
group:
name: impress-deployers
- name: Add the current user to the "impress-deployers" group
user:
name: "{{ lookup('env', 'USER') }}"
groups:
- impress-deployers
append: yes
# We use this so the deploy playbook doesn't have to prompt for a root
# password: this user just is trusted to act as "impress" in the future.
- name: Enable the "impress-deployers" group to freely act as the "impress" user
community.general.sudoers:
name: impress-deployers-as-impress
group: impress-deployers
runas: impress
commands: ALL
nopassword: yes
# Similarly, this enables us to manage the impress service in the deploy playbook
# and in live debugging without a password.
# NOTE: In the sudoers file, you need to specify the full path to the
# command, to avoid tricks where you use PATH to get around the intent!
- name: Enable the "impress-deployers" group to freely start and stop the impress service
community.general.sudoers:
name: impress-deployers-systemctl
group: impress-deployers
commands:
- /bin/systemctl status impress
- /bin/systemctl start impress
- /bin/systemctl stop impress
- /bin/systemctl restart impress
nopassword: yes
- name: Install ACL, to enable us to run commands as the "impress" user
apt:
name: acl
- name: Install ruby-build
git:
repo: https://github.com/rbenv/ruby-build.git
dest: /opt/ruby-build
version: 4d4678bc1ed89aa6900c0ea0da23495445dbcf50
- name: Check if Ruby 3.1.4 is already installed
stat:
path: /opt/ruby-3.1.4
register: ruby_dir
- name: Install Ruby 3.1.4
command: "/opt/ruby-build/bin/ruby-build 3.1.4 /opt/ruby-3.1.4"
when: not ruby_dir.stat.exists
- name: Add Ruby 3.1.4 to the global PATH, for developer convenience
lineinfile:
dest: /etc/profile
line: 'PATH="/opt/ruby-3.1.4/bin:$PATH" # Added by impress deploy setup script'
- name: Install system dependencies for impress's Ruby gems
apt:
name: libmysqlclient-dev
- name: Create the app folder
file:
path: /srv/impress
owner: impress
group: impress
mode: "755"
state: directory
- name: Create the app's "versions" folder
become_user: impress
file:
path: /srv/impress/versions
state: directory
- name: Create the app's "shared" folder
become_user: impress
file:
path: /srv/impress/shared
state: directory
- name: Check for a current app version
stat:
path: /srv/impress/current
register: current_app_version
- name: Check whether we already have a placeholder app
stat:
path: /srv/impress/versions/initial-placeholder
register: existing_placeholder_app
when: not current_app_version.stat.exists
- name: Create a placeholder app, to run until we deploy a real version
become_user: impress
copy:
src: files/initial-placeholder
dest: /srv/impress/versions
when: |
not current_app_version.stat.exists and
not existing_placeholder_app.stat.exists
- name: Configure the placeholder app to run in deployment mode
become_user: impress
command:
chdir: /srv/impress/versions/initial-placeholder
cmd: /opt/ruby-3.1.4/bin/bundle config set --local deployment true
when: not current_app_version.stat.exists
- name: Install the placeholder app's dependencies
become_user: impress
command:
chdir: /srv/impress/versions/initial-placeholder
cmd: /opt/ruby-3.1.4/bin/bundle install
when: not current_app_version.stat.exists
- name: Set the placeholder app as the current version
become_user: impress
file:
src: /srv/impress/versions/initial-placeholder
dest: /srv/impress/current
state: link
when: not current_app_version.stat.exists
# NOTE: This file is uploaded with stricter permissions, to help protect
# the secrets inside. Most of the app is world-readable for convenience
# for debugging and letting nginx serve static files, but keep this safer!
- name: Upload the production.env file
become_user: impress
copy:
dest: /srv/impress/shared/production.env
src: files/production.env
mode: "600"
notify:
- Reload systemctl
- Restart impress
- name: Create service file for impress
copy:
dest: /etc/systemd/system/impress.service
content: |
[Unit]
Description=Dress to Impress webapp
[Service]
User=impress
Restart=always
WorkingDirectory=/srv/impress/current
ExecStart=/opt/ruby-3.1.4/bin/bundle exec puma --port=3000
Environment="RAILS_ENV=production"
; Set EXECJS_RUNTIME to save us from needing to install Node
Environment="EXECJS_RUNTIME=Disabled"
EnvironmentFile=/srv/impress/shared/production.env
; Some security directives, adapted from Akkoma's service file, they seem like sensible defaults!
; Use private /tmp and /var/tmp folders inside a new file system namespace, which are discarded after the process stops.
PrivateTmp=true
; The /home, /root, and /run/user folders can not be accessed by this service anymore. If your Akkoma user has its home folder in one of the restricted places, or use one of these folders as its working directory, you have to set this to false.
ProtectHome=true
; Mount /usr, /boot, and /etc as read-only for processes invoked by this service.
ProtectSystem=full
; Sets up a new /dev mount for the process and only adds API pseudo devices like /dev/null, /dev/zero or /dev/random but not physical devices.
PrivateDevices=true
; Ensures that the service process and all its children can never gain new privileges through execve().
NoNewPrivileges=true
; Drops the sysadmin capability from the daemon.
CapabilityBoundingSet=~CAP_SYS_ADMIN
[Install]
WantedBy=multi-user.target
notify:
- Reload systemctl
- Restart impress
- name: Configure impress to run now, and automatically when the system starts
systemd:
name: impress
state: started
enabled: true
- name: Install nginx
apt:
name: nginx
- name: Install core snap
community.general.snap:
name: core
- name: Install certbot as a snap
community.general.snap:
name: certbot
classic: yes
- name: Set up certbot
command: "certbot certonly --nginx -n --agree-tos --email {{ email_address }} --domains beta.impress.openneo.net"
# TODO: Remove the duplication once we've fully switched over hosts!
# NOTE: I migrated over the certs manually, we'll want to have certbot
# replace them once it's recognized as impress.openneo.net!
- name: Add impress config file to nginx
copy:
content: |
server {
server_name impress.openneo.net;
listen 80;
if ($host = impress.openneo.net) {
return 301 https://$host$request_uri;
}
}
server {
server_name impress.openneo.net;
listen 443 ssl;
ssl_certificate /etc/letsencrypt/live/impress.openneo.net/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/impress.openneo.net/privkey.pem;
include /etc/letsencrypt/options-ssl-nginx.conf;
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
ssl_session_cache shared:SSL:10m; # https://superuser.com/q/1484466/14127
root /srv/impress/current/public;
# Try serving static files first. If not found, fall back to the app.
try_files $uri/index.html $uri @app;
location @app {
proxy_pass http://127.0.0.1:3000;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto https;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header Host $http_host;
proxy_redirect off;
}
}
server {
server_name {{ impress_hostname }};
listen 80;
if ($host = {{ impress_hostname }}) {
return 301 https://$host$request_uri;
}
}
server {
server_name {{ impress_hostname }};
listen 443 ssl;
ssl_certificate /etc/letsencrypt/live/{{ impress_hostname }}/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/{{ impress_hostname }}/privkey.pem;
include /etc/letsencrypt/options-ssl-nginx.conf;
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
ssl_session_cache shared:SSL:10m; # https://superuser.com/q/1484466/14127
root /srv/impress/current/public;
# Try serving static files first. If not found, fall back to the app.
try_files $uri/index.html $uri @app;
location @app {
proxy_pass http://127.0.0.1:3000;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto https;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header Host $http_host;
proxy_redirect off;
}
}
dest: /etc/nginx/sites-available/impress.conf
notify:
- Restart nginx
- name: Enable impress config file in nginx
file:
src: /etc/nginx/sites-available/impress.conf
dest: /etc/nginx/sites-enabled/impress.conf
state: link
notify:
- Restart nginx
handlers:
- name: Restart nginx
systemd:
name: nginx
state: restarted
- name: Reload systemctl
command: systemctl daemon-reload
- name: Restart impress
systemd:
name: impress
state: restarted