varnish for wordpress

/etc/yum.repos.d/varnish.repo

[varnishcache_varnish41]
name=varnishcache_varnish41
baseurl=https://packagecloud.io/varnishcache/varnish41/el/6/$basearch
repo_gpgcheck=1
gpgcheck=0
enabled=1
gpgkey=https://packagecloud.io/varnishcache/varnish41/gpgkey
sslverify=1
sslcacert=/etc/pki/tls/certs/ca-bundle.crt
metadata_expire=300

OK, ready then

yum clean all
yum install varnish

Check the version:

# /usr/sbin/varnishd -V
varnishd (varnish-4.1.8 revision d266ac5c6)