provision vagrant cluster

Author: kelvich

testeaux/Vagrantfile

@@ -2,10 +2,20 @@
 # vi: set ft=ruby :
 
 Vagrant.configure(2) do |config|
-  config.vm.box = "ubuntu/ubuntu-15.04-snappy-core-stable"
+  config.vm.box = "ubuntu/trusty64"
 
-  5.times do |i|
-    config.vm.define "n#{i+1}l"
+  nhosts = 3
+
+  nhosts.times do |i|
+    config.vm.define "node#{i}" do |node|
+      node.vm.hostname = "node#{i}"
+      if i == nhosts - 1
+        node.vm.provision :ansible do |ansible|
+          ansible.limit = "all"
+          ansible.playbook = "provision.yml"
+        end
+      end
+    end
   end
 
 end

testeaux/provision.yml

@@ -0,0 +1,68 @@
+---
+
+- hosts: all
+
+  roles:
+  - role: kelvich.postgres
+    pg_port: 5432
+    pg_repo: https://github.com/postgrespro/postgres_cluster.git
+    pg_version_tag: master
+    pg_destroy_and_init: true
+    pg_config_role:
+    - line: "multimaster.buffer_size = 65536"
+
+  tasks:
+  - name: generate connstrings
+    set_fact:
+      connstr: "host={{item}} user={{ansible_ssh_user}} dbname=postgres"
+    with_items:
+      groups['all'] | reverse | batch(nnodes | d(3) | int) | first
+    register: connstrs
+
+  - name: make a list
+    set_fact:
+      connections: "{{ connstrs.results | map(attribute='ansible_facts.connstr') | join(', ') }}"
+
+  - debug: var=hostvars
+
+  - debug: var=inventory_hostname
+
+  #- debug: var=hostvars[inventory_hostname]
+
+  - name: build raftable
+    shell: "make clean && make -j {{makejobs}} install"
+    args:
+      chdir: "{{pg_src}}/contrib/raftable"
+
+  - name: build multimaster
+    shell: "make clean && make -j {{makejobs}} install"
+    args:
+      chdir: "{{pg_src}}/contrib/mmts"
+
+  - name: enable dtm extension on datanodes
+    lineinfile:
+      dest: "{{pg_datadir}}/postgresql.conf"
+      line: "{{item}}"
+      state: present
+    with_items:
+    - "wal_level = logical"
+    - "max_wal_senders = 10"
+    - "wal_sender_timeout = 0"
+    - "max_replication_slots = 10"
+    - "max_connections = 200"
+    - "max_worker_processes = 100"
+    - "shared_preload_libraries = 'raftable,multimaster'"
+    - "multimaster.conn_strings = '{{connections}}'"
+    - "multimaster.node_id = {{ inventory_hostname | regex_replace('([0-9]+)', '\\1') }}"
+    - "multimaster.buffer_size = 65536"
+    - "multimaster.queue_size = 1073741824"
+    - "multimaster.arbiter_port = 5600"
+    - "multimaster.vacuum_delay = 1"
+    - "multimaster.workers = 32"
+    - "multimaster.use_dtm = 1"
+
+  - name: restart postgrespro
+    command: "{{pg_dst}}/bin/pg_ctl restart -w -D {{pg_datadir}} -l {{pg_datadir}}/pg.log"
+    environment:
+      LD_LIBRARY_PATH: "{{pg_dst}}/lib/"
+