Installing Varnish Cache ?

@Talia Olga already answered at Help me for my.cnf config for Dedicated Server | Centmin Mod Community but moved off topic post to new thread here.

Varnish official 3.x YUM repo is available since 1.2.3-eva2000.04 Change Log Centmin Mod - Menu based Nginx installer for CentOS servers

There's no support for configuring Varnish, Centmin Mod only provides the base Varnish YUM repo for ease of installation for folks who know what they are doing for Varnish vcl configuration for their specific web apps..

 

as above quoted example

Code:

yum -q list varnish --enablerepo=varnish-3.0

Code:

yum -q list varnish --enablerepo=varnish-3.0
Available Packages
varnish.x86_64  3.0.5-1.el6           varnish-3.

 

The Varnish Cache is installed via official Varnish YUM repository, so everything config file (vcl etc) and init.d startup script wise are located at their documented default locations as per official documentation Documentation | Varnish Community

You can also query the installed Varnish package via rpm -ql command to find out what the package installed.

Code:

rpm -ql varnish
/etc/logrotate.d/varnish
/etc/rc.d/init.d/varnish
/etc/rc.d/init.d/varnishlog
/etc/rc.d/init.d/varnishncsa
/etc/sysconfig/varnish
/etc/varnish
/etc/varnish/default.vcl
/usr/bin/varnish_reload_vcl
/usr/bin/varnishadm
/usr/bin/varnishhist
/usr/bin/varnishlog
/usr/bin/varnishncsa
/usr/bin/varnishreplay
/usr/bin/varnishsizes
/usr/bin/varnishstat
/usr/bin/varnishtest
/usr/bin/varnishtop
/usr/lib64/varnish
/usr/lib64/varnish/libvarnish.so
/usr/lib64/varnish/libvarnishcompat.so
/usr/lib64/varnish/libvcl.so
/usr/lib64/varnish/libvgz.so
/usr/lib64/varnish/vmods
/usr/lib64/varnish/vmods/libvmod_std.so
/usr/sbin/varnishd
/usr/share/doc/varnish-3.0.5
/usr/share/doc/varnish-3.0.5/ChangeLog
/usr/share/doc/varnish-3.0.5/LICENSE
/usr/share/doc/varnish-3.0.5/README
/usr/share/doc/varnish-3.0.5/README.redhat
/usr/share/doc/varnish-3.0.5/examples
/usr/share/doc/varnish-3.0.5/examples/default.vcl
/usr/share/doc/varnish-3.0.5/examples/zope-plone.vcl
/usr/share/man/man1/varnishadm.1.gz
/usr/share/man/man1/varnishd.1.gz
/usr/share/man/man1/varnishhist.1.gz
/usr/share/man/man1/varnishlog.1.gz
/usr/share/man/man1/varnishncsa.1.gz
/usr/share/man/man1/varnishreplay.1.gz
/usr/share/man/man1/varnishsizes.1.gz
/usr/share/man/man1/varnishstat.1.gz
/usr/share/man/man1/varnishtest.1.gz
/usr/share/man/man1/varnishtop.1.gz
/usr/share/man/man3/vmod_std.3.gz
/usr/share/man/man7/varnish-cli.7.gz
/usr/share/man/man7/varnish-counters.7.gz
/usr/share/man/man7/vcl.7.gz
/var/lib/varnish
/var/log/varnish

 

normal Varnish start and stop commands for CentOS/Redhat builds as per documentation Documentation | Varnish Community

Code:

chkconfig varnish on
service varnish stop/start/reload/start 

Code:

service varnish
Usage: /etc/init.d/varnish {start|stop|status|restart|condrestart|try-restart|reload|force-reload}

As to configuration of Varnish Cache that is up to you as Centmin Mod only provides the official Varnish Cache YUM repo itself so that folks who know how to configuration and setup Varnish Cache can do it themselves. Which basically involves

1. Setting up and configuring Varnish Cache default.vcl settings for your specific apps
2. Then switching the default Varnish Cache listening port to 80
3. Then switching each and all Nginx vhost .conf files including virtual.conf located in /usr/local/nginx/conf/conf.d/ from listen 80 to listen XX where XX is your defined Varnish backend port.
4. Setting up Nginx for reverse proxy IP forwarding via HttpRealIpModule as per step 5 of Getting Started guide.

All these 4 steps are left to end user to do as Centmin Mod is provided as is, without any specific support for Varnish Cache.

 

already answered in other thread Help me for my.cnf config for Dedicated Server | Centmin Mod Community - how much depends on how much you need as per memcached stats analysis

 

you haven't installed Varnish Cache, above command only lists Varnish Cache you need to use yum install command to install it as per documentation.

list Varnish Cache

Code:

yum -q list varnish --enablerepo=varnish-3.0

install Varnish Cache

Code:

yum install varnish --enablerepo=varnish-3.0

If you haven't used Varnish Cache before, I'd advise against using it for production live site until you do testing first and have read the official documentation

 

Ah in that case you have alot of reading to do for CentOS And I'd stick with CentOS 6.x as CentOS 7.x has even more changes like changing from init.d to systemd see CentOS 7.x - CentOS 7.0 Install on VirtualBOX Guest Server

i.e. all startup init.d scripts

Code:

ls -lah /etc/init.d/
total 296K
drwxr-xr-x.  2 root root 4.0K Sep 28 10:09 .
drwxr-xr-x. 10 root root 4.0K Sep  3 20:24 ..
-rwxr-xr-x   1 root root 3.3K May 28 14:37 auditd
-r-xr-xr-x.  1 root root 1.4K Nov 23  2013 blk-availability
-rwxr-xr-x.  1 root root 2.8K Nov 23  2013 crond
-rwxr-xr-x   1 root root 1.9K Dec 22  2013 csf
-rw-r--r--   1 root root  19K Sep  3 13:02 functions
-rwxr-xr-x   1 root root 5.8K Oct 10  2013 halt
-rwxr-xr-x   1 root root 1.8K Sep 26 03:55 haveged
-rwxr-xr-x.  1 root root  11K Nov 23  2013 ip6tables
-rwxr-xr-x.  1 root root  11K Nov 23  2013 iptables
-rwxr-xr-x.  1 root root 4.5K Oct  8  2013 iscsi
-rwxr-xr-x.  1 root root 3.9K Oct  8  2013 iscsid
-rwxr-xr-x   1 root root  652 Oct 10  2013 killall
-rwxr-xr-x   1 root root 2.2K Dec 22  2013 lfd
-r-xr-xr-x.  1 root root 2.1K Nov 23  2013 lvm2-lvmetad
-r-xr-xr-x.  1 root root 2.7K Nov 23  2013 lvm2-monitor
-rwxr-xr-x   1 root root 2.6K Apr  7 11:49 mdmonitor
-rwxr-xr-x   1 root root 3.5K Sep 26 03:54 memcached
-rwxr-xr-x.  1 root root 2.2K Sep 13  2012 messagebus
-rwxr-xr-x   1 root root 2.5K Sep 22 09:06 multipathd
-rwxr-xr-x   1 root root  12K Sep 26 03:46 mysql
-rwxr-xr-x   1 root root 3.0K Oct 10  2013 netconsole
-rwxr-xr-x   1 root root 5.4K Oct 10  2013 netfs
-rwxr-xr-x   1 root root 6.2K Oct 10  2013 network
-rwxr-xr-x   1 root root 2.0K Sep 26 03:45 nginx
-rwxr-xr-x   1 root root 2.4K Sep 26 03:55 nsd
-rwxr-xr-x   1 root root 1.9K Jul 15  2013 ntpd
-rwxr-xr-x   1 root root 2.0K Jul 15  2013 ntpdate
-rwxr-xr-x   1 root root 3.5K Sep 26 03:50 php-fpm
-rwxr-xr-x   1 root root 3.9K Feb 20  2014 postfix
-rwxr-xr-x.  1 root root 1.5K Sep 17  2013 rdisc
-rwxr-xr-x.  1 root root 1.8K Nov 22  2013 restorecond
-rwxr-xr-x   1 root root 1.8K Dec 17  2011 rngd
-rwxr-xr-x.  1 root root 2.0K Aug 15  2013 rsyslog
-rwxr-xr-x.  1 root root 1.7K Nov 22  2013 sandbox
-rwxr-xr-x.  1 root root 2.1K Nov 20  2012 saslauthd
-rwxr-xr-x   1 root root  647 Oct 10  2013 single
-rwxr-xr-x.  1 root root 3.0K Feb 21  2013 smartd
-rwxr-xr-x   1 root root 2.2K Sep 15 06:42 snmpd
-rwxr-xr-x   1 root root 1.7K Sep 15 06:42 snmptrapd
-rwxr-xr-x.  1 root root 4.5K Nov 22  2013 sshd
-rwxr-xr-x   1 root root 1.2K Aug 29 07:13 sysstat
-rwxr-xr-x.  1 root root 2.3K Nov 22  2013 udev-post
-rwxr-xr-x   1 root root 2.9K Dec  2  2013 varnish
-rwxr-xr-x   1 root root 1.8K Dec  2  2013 varnishlog
-rwxr-xr-x   1 root root 1.8K Dec  2  2013 varnishncsa

 

I usually have my own custom sysconfig/varnish setup that is based on alternative 3 configuration defined in /etc/sysconfig/varnish so use that to edit and set Varnish to either be backed by file or memory caching varnish.sysconfig in redhat – Varnish

Again best to read the Redhat/CentOS official documentation for Varnish Cache at Documentation | Varnish Community

Code:

## Alternative 3, Advanced configuration
#
# See varnishd(1) for more information.
#
# # Main configuration file. You probably want to change it :)
VARNISH_VCL_CONF=/etc/varnish/default.vcl
#
# # Default address and port to bind to
# # Blank address means all IPv4 and IPv6 interfaces, otherwise specify
# # a host name, an IPv4 dotted quad, or an IPv6 address in brackets.
# VARNISH_LISTEN_ADDRESS=
VARNISH_LISTEN_PORT=6081
#
# # Telnet admin interface listen address and port
VARNISH_ADMIN_LISTEN_ADDRESS=127.0.0.1
VARNISH_ADMIN_LISTEN_PORT=6082
#
# # Shared secret file for admin interface
VARNISH_SECRET_FILE=/etc/varnish/secret
#
# # The minimum number of worker threads to start
VARNISH_MIN_THREADS=50
#
# # The Maximum number of worker threads to start
VARNISH_MAX_THREADS=1000
#
# # Idle timeout for worker threads
VARNISH_THREAD_TIMEOUT=120
#
# # Cache file location
VARNISH_STORAGE_FILE=/var/lib/varnish/varnish_storage.bin
#
# # Cache file size: in bytes, optionally using k / M / G / T suffix,
# # or in percentage of available disk space using the % suffix.
VARNISH_STORAGE_SIZE=1G
#
# # Backend storage specification
VARNISH_STORAGE="file,${VARNISH_STORAGE_FILE},${VARNISH_STORAGE_SIZE}"
#
# # Default TTL used when the backend does not specify one
VARNISH_TTL=120
#
# # DAEMON_OPTS is used by the init script.  If you add or remove options, make
# # sure you update this section, too.
DAEMON_OPTS="-a ${VARNISH_LISTEN_ADDRESS}:${VARNISH_LISTEN_PORT} \
             -f ${VARNISH_VCL_CONF} \
             -T ${VARNISH_ADMIN_LISTEN_ADDRESS}:${VARNISH_ADMIN_LISTEN_PORT} \
             -t ${VARNISH_TTL} \
             -w ${VARNISH_MIN_THREADS},${VARNISH_MAX_THREADS},${VARNISH_THREAD_TIMEOUT} \
             -u varnish -g varnish \
             -S ${VARNISH_SECRET_FILE} \
             -s ${VARNISH_STORAGE}"
#

 

by default /etc/sysconfig/varnish uses alternative 3 config anyway, so just need to edit the VARNISH_LISTEN_PORT and VARNISH_STORAGE_FILE and edit VARNISH_STORAGE_SIZE

i.e.

Code:

# # Cache file size: in bytes, optionally using k / M / G / T suffix,
# # or in percentage of available disk space using the % suffix.
VARNISH_STORAGE_SIZE=1G
#
# # Backend storage specification
#VARNISH_STORAGE="file,${VARNISH_STORAGE_FILE},${VARNISH_STORAGE_SIZE}"
VARNISH_STORAGE="malloc,${VARNISH_STORAGE_SIZE}"

rest is up to you as it's all in official docs at Using Varnish — Varnish version 3.0.6rc1 documentation

Code:

varnishadm -T 127.0.0.1:6082 -S /etc/varnish/secret param.show
acceptor_sleep_decay        0.900000 []
acceptor_sleep_incr         0.001000 [s]
acceptor_sleep_max          0.050000 [s]
auto_restart                on [bool]
ban_dups                    on [bool]
ban_lurker_sleep            0.010000 [s]
between_bytes_timeout       60.000000 [s]
cc_command                  "exec gcc -std=gnu99 -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -pthread -fpic -shared -Wl,-x -o %o %s"
cli_buffer                  8192 [bytes]
cli_timeout                 10 [seconds]
clock_skew                  10 [s]
connect_timeout             0.700000 [s]
critbit_cooloff             180.000000 [s]
default_grace               10.000000 [seconds]
default_keep                0.000000 [seconds]
default_ttl                 120.000000 [seconds]
diag_bitmap                 0x0 [bitmap]
esi_syntax                  0 [bitmap]
expiry_sleep                1.000000 [seconds]
fetch_chunksize             128 [kilobytes]
fetch_maxchunksize          262144 [kilobytes]
first_byte_timeout          60.000000 [s]
group                       varnish (495)
gzip_level                  6 []
gzip_memlevel               8 []
gzip_stack_buffer           32768 [Bytes]
gzip_tmp_space              0 []
gzip_window                 15 []
http_gzip_support           on [bool]
http_max_hdr                64 [header lines]
http_range_support          on [bool]
http_req_hdr_len            8192 [bytes]
http_req_size               32768 [bytes]
http_resp_hdr_len           8192 [bytes]
http_resp_size              32768 [bytes]
idle_send_timeout           60 [seconds]
listen_address              :6081
listen_depth                1024 [connections]
log_hashstring              on [bool]
log_local_address           off [bool]
lru_interval                2 [seconds]
max_esi_depth               5 [levels]
max_restarts                4 [restarts]
nuke_limit                  50 [allocations]
pcre_match_limit            10000 []
pcre_match_limit_recursion  10000 []
ping_interval               3 [seconds]
pipe_timeout                60 [seconds]
prefer_ipv6                 off [bool]
queue_max                   100 [%]
rush_exponent               3 [requests per request]
saintmode_threshold         10 [objects]
send_timeout                600 [seconds]
sess_timeout                5 [seconds]
sess_workspace              65536 [bytes]
session_linger              50 [ms]
session_max                 100000 [sessions]
shm_reclen                  255 [bytes]
shm_workspace               8192 [bytes]
shortlived                  10.000000 [s]
syslog_cli_traffic          on [bool]
thread_pool_add_delay       2 [milliseconds]
thread_pool_add_threshold   2 [requests]
thread_pool_fail_delay      200 [milliseconds]
thread_pool_max             1000 [threads]
thread_pool_min             50 [threads]
thread_pool_purge_delay     1000 [milliseconds]
thread_pool_stack           unlimited [bytes]
thread_pool_timeout         120 [seconds]
thread_pool_workspace       65536 [bytes]
thread_pools                2 [pools]
thread_stats_rate           10 [requests]
user                        varnish (496)
vcc_err_unref               on [bool]
vcl_dir                     /etc/varnish
vcl_trace                   off [bool]
vmod_dir                    /usr/lib64/varnish/vmods
waiter                      default (epoll, poll)