Merge branch 'keepalived' into 'newinfra'

Keepalived

See merge request nounous/ansible!27

group_vars/keepalived.yml

@@ -1,10 +1,15 @@
 ---
 
-keepalived:
+glob_keepalived:
+  mail_source: keepalived@crans.org
+  mail_destination: root@crans.org
+  smtp_server: smtp.adm.crans.org
+  pool:
     dhcp:
       password: "plopisverysecure"
       id: 60
       ipv6: no
+      notify: /usr/scripts/notify-dhcp
       zones:
         - vlan: adh-nat
           ipv4: 100.64.0.99/16

host_vars/bakdaur.adm.crans.org.yml

@@ -3,7 +3,8 @@ interfaces:
   adm: eth0
   srv: eth1
 
-keepalived_instances:
+loc_keepalived:
+  instances:
     - name: proxy
       tag: VI_DAUR
       state: MASTER

host_vars/eap.adm.crans.org.yml

@@ -5,7 +5,8 @@ interfaces:
   bornes: eth1
   switches: eth2
 
-keepalived_instances:
+loc_keepalived:
+  instances:
     - name: radius
       tag: VI_RAD
       state: BACKUP

host_vars/frontdaur.adm.crans.org.yml

@@ -3,7 +3,8 @@ interfaces:
   adm: eth1
   srv: eth0
 
-keepalived_instances:
+loc_keepalived:
+  instances:
     - name: proxy
       tag: VI_DAUR
       state: BACKUP

host_vars/gulp.adm.crans.org.yml

@@ -7,7 +7,8 @@ interfaces:
   wifi_new: ens1f0.22
   zayo: ens1f0.26
 
-keepalived_instances:
+loc_keepalived:
+  instances:
     - name: router
       tag: VI_ROUT
       state: MASTER

host_vars/odlyd.adm.crans.org.yml

@@ -10,7 +10,8 @@ interfaces:
   srv: ens1f0.24
   zayo: ens1f0.26
 
-keepalived_instances:
+loc_keepalived:
+  instances:
     - name: radius
       tag: VI_RAD
       state: BACKUP

host_vars/radius.adm.crans.org.yml

@@ -5,7 +5,8 @@ interfaces:
   bornes: eth1
   switches: eth2
 
-keepalived_instances:
+loc_keepalived:
+  instances:
     - name: radius
       tag: VI_RAD
       state: MASTER

host_vars/routeur-daniel.adm.crans.org.yml

@@ -8,7 +8,8 @@ interfaces:
   adh-nat: ens23
 
 
-keepalived_instances:
+loc_keepalived:
+  instances:
     - name: dhcp
       tag: VI_DHCP
       state: BACKUP

host_vars/routeur-sam.adm.crans.org.yml

@@ -8,7 +8,8 @@ interfaces:
   adh-nat: ens23
 
 
-keepalived_instances:
+loc_keepalived:
+  instances:
     - name: dhcp
       tag: VI_DHCP
       state: MASTER

plays/keepalived.yml

@@ -1,5 +1,7 @@
 #!/usr/bin/env ansible-playbook
 ---
 - hosts: keepalived
+  vars:
+    keepalived: "{{ glob_keepalived | combine(loc_keepalived) }}"
   roles:
     - keepalived

roles/keepalived/README.md

@@ -0,0 +1,38 @@
+# KEEPALIVED
+
+Ce rôle installe keepalived pour permettre la redondance de certain service
+entre plusieurs services.
+/!\ Ce rôle déploie un script pour relancer automatiquement le serveur dhcp /!\
+
+## VARS
+
+keepalived:
+  - mail_destination: a qui envoyé les mails en cas de switching
+  - mail_source: qui envoie les mails
+  - smtp_server: le serveur smtp par qui passer pour envoyer les mails
+  - pool: Une liste de différentes instances installable sur la machine. Les
+    instances sont des dictionnaires comprenant les champs suivant :
+    - name: le nom de l'instance
+    - password: le mot de passe que vont utilisé les marchines d'une même
+      instance pour se synchroniser
+    - id: l'indentifiant qu'elles vont utiliser pour discuter
+    - ipv6: s'il est necessaire de configurer une instance supplémentaire pour
+      de l'ipv6
+    - notify: le script a notifé en cas de switching (s'il n'est pas précisé
+      aucun script n'est utilisé)
+    - administration: le vlan d'administration sur lequel les machines d'une
+      même instances vont discuter
+    - zones: une liste de zone sur lequel vont parler les instances keepalived.
+      Chaque zone est un disctionnaire comprenant les champs suivants:
+      - vlan: le vlan sur lequel est installé la zone
+      - ipv4: l'ipv4 au format CIDR partagé par les machines
+      - brd: s'il faut préciser ou non l'interface de broadcast
+      - ipv6: une ipv6 (elle peut ne pas être précisé, si elle est présente mais
+        que l'instance ne précise pas ipv6, elle sera ignoré)
+  - instances: Une liste d'instance a déployer sur la machine. Les instances
+    sont des dictionnaires comprenant les champs suivants:
+    - name: le nom de linstance a deployer
+    - tag: le petit nom à lui donner
+    - state: l'état (entre BACKUP et MASTER)
+    - priority: la priorité (pour un MASTER on met par défaut 150 puis on reduit
+      de 50 par 50)

roles/keepalived/tasks/main.yml

@@ -13,3 +13,16 @@
     dest: /etc/keepalived/keepalived.conf
     mode: 0644
   notify: Reload keepalived.service
+
+- name: Create scripts directory
+  file:
+    path: /usr/scripts
+    state: directory
+
+- name: Deploy keepalived dhcp scripts
+  template:
+    src: bin/notify-dhcp
+    dest: /usr/scripts/notify-dhcp
+    mode: 0744
+  when: not ansible_check_mode
+  notify: Reload keepalived.service

roles/keepalived/templates/bin/notify-dhcp

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+TYPE=$1
+NAME=$2
+STATE=$3
+
+case $STATE in
+	"MASTER")
+		logger -s '[DHCP-NOTIFY] Entering state MASTER, starting isc-dhcp-server.service'
+		systemctl start isc-dhcp-server.service
+		exit 0;;
+	"BACKUP")
+		logger -s '[DHCP-NOTIFY] Entering state BACKUP, stopping isc-dhcp-server.service'
+		systemctl stop isc-dhcp-server.service
+		exit 0;;
+	"FAULT")
+		logger -s '[DHCP-NOTIFY] Entering state FAULT, stopping isc-dhcp-server.service'
+		systemctl stop isc-dhcp-server.service
+		exit 0;;
+	*)
+		logger -s '[DHCP-NOTIFY] Entering UNKNOWN state, doing nothing'
+		exit 1;;
+esac
+

roles/keepalived/templates/keepalived/keepalived.conf.j2

@@ -1,31 +1,33 @@
 {{ ansible_header | comment }}
 
 global_defs {
-  notification_email {
-    root@crans.org
-  }
-  notification_email_from keepalived@crans.org
-  smtp_server smtp.adm.crans.org
+  notification_email { {{ keepalived.mail_destination }} }
+  notification_email_from {{ keepalived.mail_source }}
+  smtp_server {{ keepalived.smtp_server }}
 }
 
-{% for instance in keepalived_instances %}
+{% for instance in keepalived.instances %}
 vrrp_instance {{ instance.tag }}4 {
   state {{ instance.state }}
   priority {{ instance.priority }}
   smtp_alert
 
   interface {{ interfaces.adm }}
-  virtual_router_id {{ keepalived[instance.name].id }}
+  virtual_router_id {{ keepalived.pool[instance.name].id }}
   advert_int 2
   authentication {
     auth_type PASS
-    auth_pass {{ keepalived[instance.name].password }}
+    auth_pass {{ keepalived.pool[instance.name].password }}
   }
 
+{% if keepalived.pool[instance.name].notify is defined %}
+  notify {{ keepalived.pool[instance.name].notify }}
+{% endif %}
+
   virtual_ipaddress {
-{% for zone in keepalived[instance.name].zones %}
-  {% if zone.brd is defined %}
-      {{ zone.ipv4 }} brd {{ zone.brd }} dev {{ interfaces[zone.vlan] }} scope global
+{% for zone in keepalived.pool[instance.name].zones %}
+  {% if zone.brd  %}
+      {{ zone.ipv4 }} brd {{ zone.ipv4 | ipaddr('broadcast') }} dev {{ interfaces[zone.vlan] }} scope global
   {% else %}
       {{ zone.ipv4 }} dev {{ interfaces[zone.vlan] }} scope global
   {% endif %}
@@ -33,23 +35,25 @@ vrrp_instance {{ instance.tag }}4 {
   }
 }
 
-{% if keepalived[instance.name].ipv6 %}
+{% if keepalived.pool[instance.name].ipv6 %}
 vrrp_instance {{ instance.tag }}6 {
   state {{ instance.state }}
   priority {{ instance.priority }}
   smtp_alert
 
-  interface {{ interfaces.adm }}
-  virtual_router_id {{ keepalived[instance.name].id }}
+  interface {{ keepalived.pool[instance.name].administration }}
+  virtual_router_id {{ keepalived.pool[instance.name].id }}
   advert_int 2
   authentication {
     auth_type PASS
-    auth_pass {{ keepalived[instance.name].password }}
+    auth_pass {{ keepalived.pool[instance.name].password }}
   }
 
   virtual_ipaddress {
-{% for zone in keepalived[instance.name].zones %}
+{% for zone in keepalived.pool[instance.name].zones %}
+{% if zone.ipv6 is defined %}
       {{ zone.ipv6 }} dev {{ interfaces[zone.vlan] }} scope global
+{% endif %}
 {% endfor %}
   }
 }