How To Install & Configure Varnish with Apache on Ubuntu

1
(No Transcript)
2
How To Install Configure Varnish with Apache on
Ubuntu

• Varnish is an HTTP accelerator designed for
  content-heavy dynamic web sites.
• In contrast to other web accelerators, such as
  Squid, which began life as a client-side cache,
  or Apache and nginx, which are primarily origin
  servers, Varnish was designed as an HTTP
  accelerator.
• Varnish is focused exclusively on HTTP, unlike
  other proxy servers that often support FTP, SMTP
  and other network protocols.
• Before we install Varnish, we should have apache
  already installed. To install Apache, we should
  simple execute
• sudo apt-get install apache2

3
How To Install Configure Varnish with Apache on
Ubuntu

• Varnish should be available for install in the
  standard Ubuntu repositories.
• However, before we uninstall it we need to make
  sure that we are going to import the correct and
  latest varnish repository.
• We will start with importing their key
• sudo curl http//repo.varnish-cache.org/debian/
  GPG-key.txt sudo apt-key add -
• Then, we should open /etc/apt/sources.list file
  for editing and add the following line
• deb http//repo.varnish-cache.org/ubuntu/ lucid
  varnish-3.0

4
How To Install Configure Varnish with Apache on
Ubuntu

• We need make sure that our repositories are
  up-to-date.
• After then, we are ready to install Varnish.
• sudo apt-get update
• sudo apt-get install varnish
• Once we have Varnish installed, we should setup
  some basic configuration parameters.
• By default, Varnish will listen on port 80, so we
  need to edit Apache configuration and set apache
  to listen on different port.
• In order to change that port that Apache listens
  on another port, we should open
  the /etc/apache2/ports.conf file and edit as
  follows
• NameVirtualHost 127.0.0.18080
• Listen 127.0.0.18080

5
How To Install Configure Varnish with Apache on
Ubuntu

• Then, we should also make changes in the default
  virtual host file (and in every other virtual
  host file that exists)
• ltVirtualHost 127.0.0.18080gt
• In order to set varnish parameters, we should
  open the default Varnish configuration
  file, /etc/default/varnish, using our favorite
  editor, and uncomment the following directive
• DAEMON_OPTS"-a 80
• -T localhost6082
• -f /etc/varnish/default.vcl
• -S /etc/varnish/secret
• -s malloc,256m"

6
How To Install Configure Varnish with Apache on
Ubuntu

• That is all that we need to change in that file.
  Next, we open /etc/varnish/default.vcl file and
  edit as follows
• backend default
• .host "127.0.0.1"
• .port "8080"
• Please note that in 8080 is the port on which
  Apache listens.
• If we choose another port for Apache to listen
  on, that we should use that port number instead.
• We are done with the basic configuration.
• Next, we need to restart the services and all
  traffic will go through Varnish
• sudo service apache2 restart sudo service
  varnish restart

7
How To Install Configure Varnish with Apache on
Ubuntu

• If we want to check the current Varnish status
  and the cached sessions and content that is
  served through Varnish, we should execute
• varnishstat
• Hitrate ratio 3 3 3
• Hitrate avg 0.3745 0.3745 0.3745
• 869844 4.97 2.89 Client connections
  accepted
• 31200592 164.04 103.52 Client requests
  received
• 11705560 58.66 38.84 Cache hits
• Your pages are not being cached using Varnish and
  you can start by further referring to Varnish
  documentation to optimize your configuration.