Vagrant and Ansible configuration, load balancer in web servers

Ansible/01_exploring_ansible/Vagrantfile

@@ -1,3 +1,5 @@
+
+
 # -*- mode: ruby -*-
 # vi: set ft=ruby :
 
@@ -7,6 +9,24 @@
 # you're doing.
 Vagrant.configure("2") do |config|
 
+config.vm.define "lb" do |lb|
+   lb.vm.box = "centos/7"
+   lb.vm.hostname = "lb"
+   lb.vm.network "private_network", ip: "192.168.33.200"
+   lb.vm.provider "virtualbox" do |vb|
+    vb.customize ["modifyvm", :id, "--memory", "512", "--cpus", "1", "--name", "lb"]
+   end
+   lb.vm.provision "ansible" do |ansible|
+      ansible.playbook = "playbooks/haproxy/loadbalancer.yml"
+      ansible.extra_vars = {
+        "web_servers" => [
+         {"name": "web-1","ip":"192.168.33.11"},
+         {"name": "web-2","ip":"192.168.33.12"}
+        ] 
+    }    
+   end  
+ end
+
   config.ssh.insert_key = false
   (1..2).each do |i|
    config.vm.define "web-#{i}" do |web|
@@ -16,7 +36,11 @@ Vagrant.configure("2") do |config|
      web.vm.provider "virtualbox" do |vb|
       vb.customize ["modifyvm", :id, "--memory", "512", "--cpus", "1", "--name", "web-#{i}"]
      end
-     web.vm.provision "shell", inline: "echo iam ready"
+     web.vm.provision "ansible" do |ansible|
+	ansible.playbook = "playbooks/httpd/webserver.yml"
+	ansible.groups = {
+	 "webservers" => ["web-#{i}"]
+	}
    end
   end
 
@@ -27,4 +51,3 @@ Vagrant.configure("2") do |config|
    db.vm.provision "shell", inline: "echo Iam DB server"
   end
 end
-

Ansible/01_exploring_ansible/ansible.cfg.save

@@ -0,0 +1,8 @@
+[defaults]
+inventory=./ansible_hosts
+remote_user=vagrant
+private_key_file=$HOME/.vagrant.d/insecure_private_key
+
+[servers]
+192.168.33.11
+192.168.33.12

Ansible/01_exploring_ansible/ansible_hosts

@@ -4,3 +4,7 @@ web-2 ansible_ssh_host=192.168.33.12
 
 [dbservers]
 db ansible_ssh_host=192.168.33.100
+
+[first]
+servers
+dbservers

Ansible/01_exploring_ansible/playbooks/01-ping.yml

@@ -1,5 +1,9 @@
 ---
 - hosts: all
   tasks:
-    - name: Ping all servers
-      action: ping
+   - name: Ping All Servers
+    action: ping
+   - debug: msg="Hello"
+- hosts: servers
+  tasks:
+   - debug: msg="Hello Servers"

Ansible/01_exploring_ansible/playbooks/loadbalancer.yml

@@ -0,0 +1,20 @@
+---
+- hosts: lb
+  become: true
+  tasks:
+   - name: "install haproxy"
+     yum:
+	name:
+	 - haproxy
+   - name: "configure haproxy"
+     template:
+	src: templates/haproxy.j2
+	dest: /etc/haproxy/haproxy.cfg
+	owner: root
+	group: wheel
+	mode: '0644'
+   - name: "Restar and enabled haproxy"
+     service:
+	name: haproxy
+	state: restarted
+	enabled: yes

Ansible/04_load_balancer/Vagrantfile

@@ -0,0 +1,54 @@
+
+
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+# All Vagrant configuration is done below. The "2" in Vagrant.configure
+# configures the configuration version (we support older styles for
+# backwards compatibility). Please don't change it unless you know what
+# you're doing.
+Vagrant.configure("2") do |config|
+
+config.vm.define "lb" do |lb|
+   lb.vm.box = "centos/7"
+   lb.vm.hostname = "lb"
+   lb.vm.network "private_network", ip: "192.168.33.200"
+   lb.vm.provider "virtualbox" do |vb|
+    vb.customize ["modifyvm", :id, "--memory", "512", "--cpus", "1", "--name", "lb"]
+   end
+   lb.vm.provision "ansible" do |ansible|
+      ansible.playbook = "playbooks/haproxy/loadbalancer.yml"
+      ansible.extra_vars = {
+        "web_servers" => [
+         {"name": "web-1","ip":"192.168.33.11"},
+         {"name": "web-2","ip":"192.168.33.12"}
+        ] 
+    }    
+   end  
+ end
+
+  config.ssh.insert_key = false
+  (1..2).each do |i|
+   config.vm.define "web-#{i}" do |web|
+     web.vm.box = "centos/7"
+     web.vm.hostname = "web-#{i}"
+     web.vm.network "private_network", ip: "192.168.33.1#{i}"
+     web.vm.provider "virtualbox" do |vb|
+      vb.customize ["modifyvm", :id, "--memory", "512", "--cpus", "1", "--name", "web-#{i}"]
+     end
+     web.vm.provision "ansible" do |ansible|
+	ansible.playbook = "playbooks/httpd/webserver.yml"
+	ansible.groups = {
+	 "webservers" => ["web-#{i}"]
+	}
+   end
+  end
+
+  config.vm.define "db" do |db|
+   db.vm.box = "centos/7"
+   db.vm.hostname = "db"
+   db.vm.network "private_network", ip: "192.168.33.100"
+   db.vm.provision "shell", inline: "echo Iam DB server"
+  end
+end
+end

Ansible/04_load_balancer/playbooks/01-ping.yml

@@ -0,0 +1,9 @@
+---
+- hosts: all
+  tasks:
+   - name: Ping All Servers
+    action: ping
+   - debug: msg="Hello"
+- hosts: servers
+  tasks:
+   - debug: msg="Hello Servers"

Ansible/04_load_balancer/playbooks/02-shell.yml

@@ -0,0 +1,7 @@
+---
+- hosts: servers
+  tasks:
+   - name: Execute Shell Commands
+     shell: uname
+     register: uname_result
+   - debug: msg="{{ uname_result.stdout }}"

Ansible/04_load_balancer/playbooks/03-variables.yml

@@ -0,0 +1,9 @@
+---
+- hosts: servers
+  vars_files:
+    - variables.yml
+  vars:
+    variable1: "PlayBookValue"
+  tasks:
+    - name: Variable Value
+      debug: msg="Value is {{ variable1 }}"

Ansible/04_load_balancer/playbooks/04-ansible-facts.yml

@@ -0,0 +1,14 @@
+---
+- hosts: servers
+  tasks:
+    - name: Kernel
+      debug: msg="{{ ansible_kernel }}"
+    - name: Hostname
+      debug: msg="{{ ansible_hostname }}"
+    - name: Distribution
+      debug: msg="{{ ansible_distribution }}"
+    - debug: var=ansible_architecture
+    - debug: var=inventory_hostname
+    - debug: var=groups
+    - debug: var=group_names
+    - debug: var=hostvars

Ansible/04_load_balancer/playbooks/05-install-httpd.yml

@@ -0,0 +1,10 @@
+---
+- hosts: servers
+  become: true
+  tasks:
+    - yum:
+        name:
+          - httpd
+        state: present
+    - service: name=httpd state=started enabled=yes
+    - raw: "echo Welcome to Sistemas Distribuidos  | sudo tee /var/www/html/index.html"

Ansible/04_load_balancer/playbooks/06-conditionals-loops.yml

@@ -0,0 +1,24 @@
+---
+- hosts: servers 
+  vars:
+    system: "Windows"
+    color: "Red"
+  tasks:
+#    - debug: var=hostvars
+    - debug: var=ansible_system
+    - debug: var=color
+      when: system == 'Linux'
+    - debug: var=item
+      with_items:
+      - item1
+      - item2
+      - item3
+      - item4
+    - debug: var=item.name
+      with_items:
+      - name: Sebastian
+        country: India
+      - name: Garcia
+        country: US
+      - name: Delgado
+        country: Netherlands

Ansible/04_load_balancer/playbooks/haproxy/loadbalancer.yml

@@ -0,0 +1,20 @@
+---
+- hosts: lb
+  become: true
+  tasks:
+   - name: "install haproxy"
+     yum:
+       name:
+        - haproxy
+   - name: "configure haproxy"
+     template:
+       src: templates/haproxy.j2
+       dest: /etc/haproxy/haproxy.cfg
+       owner: root
+       group: wheel
+       mode: '0644'
+   - name: "Restar and enabled haproxy"
+     service:
+      name: haproxy
+      state: restarted
+      enabled: yes

Ansible/04_load_balancer/playbooks/haproxy/templates/haproxy.j2

@@ -0,0 +1,83 @@
+# example configuration for a possible web application.  See the
+# full configuration options online.
+#
+#   http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
+#
+#---------------------------------------------------------------------
+
+#---------------------------------------------------------------------
+# Global settings
+#---------------------------------------------------------------------
+global
+    # to have these messages end up in /var/log/haproxy.log you will
+    # need to:
+    #
+    # 1) configure syslog to accept network log events.  This is done
+    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
+    #    /etc/sysconfig/syslog
+    #
+    # 2) configure local2 events to go to the /var/log/haproxy.log
+    #   file. A line like the following can be added to
+    #   /etc/sysconfig/syslog
+    #
+    #    local2.*                       /var/log/haproxy.log
+    #
+    log         127.0.0.1 local2
+
+    chroot      /var/lib/haproxy
+    pidfile     /var/run/haproxy.pid
+    maxconn     4000
+    user        haproxy
+    group       haproxy
+    daemon
+
+    # turn on stats unix socket
+    stats socket /var/lib/haproxy/stats
+
+#---------------------------------------------------------------------
+# common defaults that all the 'listen' and 'backend' sections will
+# use if not designated in their block
+#---------------------------------------------------------------------
+defaults
+    mode                    http
+    log                     global
+    option                  httplog
+    option                  dontlognull
+    option http-server-close
+    option forwardfor       except 127.0.0.0/8
+    option                  redispatch
+    retries                 3
+    timeout http-request    10s
+    timeout queue           1m
+    timeout connect         10s
+    timeout client          1m
+    timeout server          1m
+    timeout http-keep-alive 10s
+    timeout check           10s
+    maxconn                 3000
+
+#---------------------------------------------------------------------
+# main frontend which proxys to the backends
+#---------------------------------------------------------------------
+frontend  main *:80
+    acl url_static       path_beg       -i /static /images /javascript /stylesheets
+    acl url_static       path_end       -i .jpg .gif .png .css .js
+
+    use_backend static          if url_static
+    default_backend             nodes
+
+#---------------------------------------------------------------------
+# static backend for serving up images, stylesheets and such
+#---------------------------------------------------------------------
+backend static
+    balance     roundrobin
+    server      static 127.0.0.1:4331 check
+
+#---------------------------------------------------------------------
+# round robin balancing between the various backends
+#---------------------------------------------------------------------
+backend nodes
+    balance     roundrobin
+    {% for server in web_servers %}
+    server web-{{server.name}} {{server.ip}}:80 check
+    {% endfor %}

Ansible/04_load_balancer/playbooks/httpd/templates/index.j2

@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Universidad Icesi - Mateo Matta </title>
+  </head>
+  <body>
+    <h1>Hello from {{print_hostname.stdout}}!</h1>
+    <a href="https://ibb.co/XpCHLh0"><img src="https://i.ibb.co/vmj9q7y/imagen-Html.png" alt="imagen-Html" border="0"></a>
+  </body>
+</html>

Ansible/04_load_balancer/playbooks/httpd/webserver.yml

@@ -0,0 +1,22 @@
+---
+- hosts: webservers
+  become: true
+  tasks:
+   - name: "Install httpd"
+     yum:
+       name: httpd
+   - name: "know hostname"
+     shell: "echo $HOSTNAME"
+     register: print_hostname
+   - name: "Configure httpd"
+     template:
+       src: templates/index.j2
+       dest: /var/www/html/index.html
+       owner: root
+       group: wheel
+       mode: '0644'
+   - name: "start httpd"
+     service:
+      name: httpd
+      state: restarted
+      enabled: yes

Ansible/04_load_balancer/playbooks/variables.yml

@@ -0,0 +1 @@
+variable1: "Variables YAML Value"