Lab 2 - Blueprint (LAMP)¶

Create Service¶

Create the Service as follows.

1. Click the + sign next to Services in the Overview pane.
2. Notice there are now 2 service block icons in the workspace.
3. Rearrange the icons to your liking, then click on the new Service 2.
4. Name your service APACHE_PHP in the Service Name field.
5. The Substrate section is the internal Calm name for this Service. Name this APACHE_PHP_AHV
6. Make sure that the Cloud is set to Nutanix and the OS set to Linux
7. Configure the VM as follows:

VM Name .  : APACHE_PHP
Image .    : CentOS
Disk Type .: DISK
Device Bus : SCSI
vCPU .     : 2
Core/vCPU .: 1
Memory     : 4 GB

8. Scroll to the bottom and add the NIC bootcamp to the APACHE_PHP VM.
9. Configure the Credentials to use CENTOS created earlier.

Package Configuration¶

1. Scroll to the top of the Service Panel and click Package.
2. Here is where we specify the installation and uninstall scripts for this service.
3. Name install package APACHE_PHP_PACKAGE,
4. Set the install script to shell and select the credential CENTOS created earlier.
5. Copy the following script into the script field of the install window:

#!/bin/bash
set -ex
# -*- Install httpd and php
sudo yum update -y
sudo yum -y install epel-release
sudo rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
sudo yum install -y httpd php56w php56w-mysql

echo "<IfModule mod_dir.c>
        DirectoryIndex index.php index.html index.cgi index.pl index.php index.xhtml index.htm
</IfModule>" | sudo tee /etc/httpd/conf.modules.d/dir.conf

echo "<?php
phpinfo();
?>" | sudo tee /var/www/html/info.php
sudo systemctl restart httpd
sudo systemctl enable httpd

Fill in the uninstall script:

6. Set the uninstall script to shell and select the credential CENTOS created earlier.
7. Copy the following script into the script field of the uninstall window:

#!/bin/bash
echo "goodbye!"

Since we need the DB IP Address to bring up the AppServer, we need to add a Dependency.

8. Click on the APACHE_PHP_PACKAGE service,
9. Click on the Arrow icon that appears right above it,
10. Click on the MYSQL service.
11. This tells Calm to hold running the script until the MYSQL service is up.
12. Save the blueprint, then click on the Create action from the Overview pane to see this.

Scale-out AppService¶

Here we’ll complete the provisioning of the blueprint.

1. Click on the APACHE_PHP_PACKAGE service.
2. Click on the Service tab.
3. Change Number of replicas under Deployment Config from 1 to 2.
4. This service will now deploy 2 VMs with the same configuration rather than just 1

Create Service¶

1. Click the + sign next to Services in the Overview pane.
2. Notice there are now 3 service block icons in the workspace.
3. Rearrange the icons to your liking, then click on the new Service 3.
4. Name your service HAProxy in the Service Name field.
5. Name the Substrate HAPROXYAHV
6. Make sure that the Cloud is set to Nutanix and the OS set to Linux
7. Configure the VM as follows:

VM Name .  : HAProxy
Image .    : CentOS
Disk Type .: DISK
Device Bus : SCSI
vCPU .     : 2
Core/vCPU .: 1
Memory     : 4 GB

8. Scroll to the bottom and add the NIC bootcamp to the HAProxy VM.
9. Configure the Credentials to use CENTOS created earlier.

Package Configuration¶

1. Scroll to the top of the Service Panel and click Package.
2. Here is where we specify the installation and uninstall scripts for this service.
3. Name the package HAPROXY_PACKAGE,
4. Set the install script to shell and select the credential CENTOS created earlier.
5. Copy the following script into the script field of the install window:

#!/bin/bash
set -ex

sudo setenforce 0
sudo sed -i 's/permissive/disabled/' /etc/sysconfig/selinux

port=80
sudo yum update -y
sudo yum install -y haproxy

echo "global
  log 127.0.0.1 local0
  log 127.0.0.1 local1 notice
  maxconn 4096
  quiet
  user haproxy
  group haproxy
defaults
  log     global
  mode    http
  retries 3
  timeout client 50s
  timeout connect 5s
  timeout server 50s
  option dontlognull
  option httplog
  option redispatch
  balance  roundrobin
# Set up application listeners here.
listen stats 0.0.0.0:8080
  mode http
  log global
  stats enable
  stats hide-version
  stats refresh 30s
  stats show-node
  stats uri /stats
listen admin
  bind 127.0.0.1:22002
  mode http
  stats uri /
frontend http
  maxconn 2000
  bind 0.0.0.0:80
  default_backend servers-http
backend servers-http" | sudo tee /etc/haproxy/haproxy.cfg

sudo sed -i 's/server host-/#server host-/g' /etc/haproxy/haproxy.cfg

hosts=$(echo "@@{APACHE_PHP.address}@@" | sed 's/^,//' | sed 's/,$//' | tr "," "\n")

for host in $hosts
do
   echo "  server host-${host} ${host}:${port} weight 1 maxconn 100 check" | sudo tee -a /etc/haproxy/haproxy.cfg
done

sudo systemctl daemon-reload
sudo systemctl enable haproxy
sudo systemctl restart haproxy

Fill in the uninstall script:

6. Set the uninstall script to shell and select the credential CENTOS created earlier.
7. Copy the following script into the script field of the uninstall window:

#!/bin/bash
echo "goodbye!"

8. We need to add a Dependency between HAProxy and APACHE_PHP_AHV
9. Click on the HAProxy service,
10. Click on the Arrow icon that appears right above it,
11. Click on the APACHE_PHP_AHV service.
12. This tells Calm to hold running the script until the APACHE_PHP_AHV service is up.
13. Save the blueprint, and launch it.