First commit

ansible/roles/consul/defaults/main.yml

@@ -0,0 +1,14 @@
+# Required
+consul_datacenter: null
+consul_secret_key: null
+consul_nodes: []
+consul_domain: None
+
+# Defaults
+consul_version: "1.22.2"
+consul_key_file: "/etc/ssl/private/local.key"
+consul_cert_file: "/etc/ssl/certs/local.crt"
+consul_ca_file: "/etc/ssl/certs/local-ca.crt"
+consul_client_addr: "0.0.0.0"
+consul_bind_addr: "{{ ansible_default_ipv4.address }}"
+consul_advertise_addr: "{{ ansible_default_ipv4.address }}"

ansible/roles/consul/handlers/main.yml

@@ -0,0 +1,10 @@
+- name: Restart Consul
+  ansible.builtin.service:
+    name: "consul"
+    state: "restarted"
+    daemon_reload: true
+
+- name: Reload Consul
+  ansible.builtin.service:
+    name: "consul"
+    state: "reloaded"

ansible/roles/consul/tasks/main.yml

@@ -0,0 +1,78 @@
+- name: Install requirements
+  ansible.builtin.apt:
+    name:
+      - "unzip"
+
+- name: Create Consul directory
+  ansible.builtin.file:
+    path: "/usr/local/consul-{{ consul_version }}"
+    state: "directory"
+    mode: "0755"
+
+- name: Install Consul
+  ansible.builtin.unarchive:
+    src: "https://releases.hashicorp.com/consul/{{ consul_version }}/consul_{{ consul_version }}_linux_amd64.zip"
+    dest: "/usr/local/consul-{{ consul_version }}"
+    remote_src: true
+  notify:
+    - "Restart Consul"
+
+- name: Link Consul
+  ansible.builtin.file:
+    src: "/usr/local/consul-{{ consul_version }}/consul"
+    dest: "/usr/local/bin/consul"
+    state: "link"
+  notify:
+    - "Restart Consul"
+
+- name: Create consul system group
+  ansible.builtin.group:
+    name: "consul"
+    system: true
+
+- name: Create consul system user
+  ansible.builtin.user:
+    name: "consul"
+    group: "consul"
+    groups: ["ssl-cert"]
+    password: "!"
+    system: true
+    home: "/opt/consul"
+
+- name: Create consul config directory
+  ansible.builtin.file:
+    path: "/etc/consul"
+    state: "directory"
+    group: "consul"
+    mode: "0750"
+
+- name: Create consul log dir
+  ansible.builtin.file:
+    path: "/var/log/consul"
+    state: "directory"
+    group: "consul"
+    mode: "0770"
+
+- name: Generate Consul config
+  ansible.builtin.template:
+    src: "templates/config.json"
+    dest: "/etc/consul/config.json"
+    group: "consul"
+    mode: "0640"
+  notify:
+    - "Reload Consul"
+
+- name: Deploy Consul service file
+  ansible.builtin.template:
+    src: "templates/consul.service"
+    dest: "/etc/systemd/system/consul.service"
+    mode: "0644"
+  notify:
+    - "Restart Consul"
+
+- name: Enable and start Consul
+  ansible.builtin.service:
+    name: "consul"
+    state: "started"
+    enabled: true
+    daemon_reload: true

ansible/roles/consul/templates/config.json

@@ -0,0 +1,26 @@
+{
+  "log_level": "INFO",
+  "node_name": "{{ ansible_hostname }}",
+  "domain": "{{ consul_domain }}",
+  "server": true,
+  "key_file": "{{ consul_key_file }}",
+  "cert_file": "{{ consul_cert_file }}",
+  "ca_file": "{{ consul_ca_file }}",
+  "verify_incoming": true,
+  "verify_outgoing": true,
+  "verify_server_hostname": true,
+  "encrypt": "{{ consul_secret_key }}",
+  "ui": true,
+  "leave_on_terminate": true,
+  "data_dir": "/opt/consul",
+  "datacenter": "{{ consul_datacenter | mandatory }}",
+  "client_addr": "{{ consul_client_addr }}",
+  "bind_addr": "{{ consul_bind_addr }}",
+  "advertise_addr": "{{ consul_advertise_addr }}",
+  "bootstrap_expect": {{ consul_nodes | length }},
+  "retry_join": ["{{ consul_nodes | join('", "') }}"],
+  "enable_syslog": true,
+  "performance": {
+    "raft_multiplier": 1
+  }
+}

ansible/roles/consul/templates/consul.service

@@ -0,0 +1,19 @@
+[Unit]
+Description="HashiCorp Consul - A service mesh solution"
+Documentation=https://www.consul.io/
+Requires=network-online.target
+After=network-online.target
+ConditionFileNotEmpty=/etc/consul/config.json
+
+[Service]
+Type=notify
+User=consul
+Group=consul
+ExecStart=/usr/local/bin/consul agent -config-file=/etc/consul/config.json
+ExecReload=/usr/local/bin/consul reload
+KillMode=process
+Restart=on-failure
+LimitNOFILE=65536
+
+[Install]
+WantedBy=multi-user.target