Install Varnish Cache on AlmaLinux 9

Step 1 – Install

dnf install epel-release -y
dnf install -y varnish
systemctl enable --now varnish

Step 2 – Basic /etc/varnish/default.vcl

vcl 4.1;

backend default {
    .host = "127.0.0.1";
    .port = "8080";
    .connect_timeout = 5s;
    .first_byte...

Install Varnish Cache on RHEL 9

Step 1 – Install

subscription-manager repos --enable codeready-builder-for-rhel-9-$(arch)-rpms
dnf install -y varnish
systemctl enable --now varnish

Step 2 – Basic /etc/varnish/default.vcl

vcl 4.1;

backend default {
    .host = "127.0.0.1";
    .port = "8080...

Install Varnish Cache on Ubuntu 24.04

Step 1 – Install

apt update && apt upgrade -y
apt install -y varnish
systemctl enable --now varnish

Step 2 – Basic /etc/varnish/default.vcl

vcl 4.1;

backend default {
    .host = "127.0.0.1";
    .port = "8080";
    .connect_timeout = 5s;
    .first_by...

Install Varnish Cache on Debian 12

Step 1 – Install

apt update && apt upgrade -y
apt install -y varnish
systemctl enable --now varnish

Step 2 – Basic /etc/varnish/default.vcl

vcl 4.1;

backend default {
    .host = "127.0.0.1";
    .port = "8080";
    .connect_timeout = 5s;
    .first_byte_...

Install Varnish Cache on Gentoo Linux

Step 1 – Install

emerge --ask www-servers/varnish
rc-update add varnish default && rc-service varnish start

Step 2 – Basic /etc/varnish/default.vcl

vcl 4.1;

backend default {
    .host = "127.0.0.1";
    .port = "8080";
    .connect_timeout = 5s;
    ....

Install Varnish Cache on Arch Linux

Step 1 – Install

pacman -S --noconfirm varnish
systemctl enable --now varnish

Step 2 – Basic /etc/varnish/default.vcl

vcl 4.1;

backend default {
    .host = "127.0.0.1";
    .port = "8080";
    .connect_timeout = 5s;
    .first_byte_timeout = 90s;
}

sub...

Install Varnish Cache on OpenBSD 7.5

Step 1 – Install

pkgin install varnish 2>/dev/null || pkg_add varnish

Step 2 – Basic /etc/varnish/default.vcl

vcl 4.1;

backend default {
    .host = "127.0.0.1";
    .port = "8080";
    .connect_timeout = 5s;
    .first_byte_timeout = 90s;
}

sub vcl_re...

Install Varnish Cache on NetBSD 10

Step 1 – Install

pkgin install varnish 2>/dev/null || pkg_add varnish

Step 2 – Basic /etc/varnish/default.vcl

vcl 4.1;

backend default {
    .host = "127.0.0.1";
    .port = "8080";
    .connect_timeout = 5s;
    .first_byte_timeout = 90s;
}

sub vcl_recv...

Varnish VCL Configuration on AlmaLinux 9

Full example with load balancing and grace

vcl 4.1;
import directors;

backend web1 {
    .host = "192.168.1.10"; .port = "8080";
    .probe = { .url = "/health"; .timeout = 5s; .interval = 10s; .window = 5; .threshold = 3; }
}
backend web2 {
    .host =...

Varnish VCL Configuration on RHEL 9

Full example with load balancing and grace

vcl 4.1;
import directors;

backend web1 {
    .host = "192.168.1.10"; .port = "8080";
    .probe = { .url = "/health"; .timeout = 5s; .interval = 10s; .window = 5; .threshold = 3; }
}
backend web2 {
    .host = "192....

Varnish VCL Configuration on Ubuntu 24.04

Full example with load balancing and grace

vcl 4.1;
import directors;

backend web1 {
    .host = "192.168.1.10"; .port = "8080";
    .probe = { .url = "/health"; .timeout = 5s; .interval = 10s; .window = 5; .threshold = 3; }
}
backend web2 {
    .host =...

Varnish VCL Configuration on Debian 12

Full example with load balancing and grace

vcl 4.1;
import directors;

backend web1 {
    .host = "192.168.1.10"; .port = "8080";
    .probe = { .url = "/health"; .timeout = 5s; .interval = 10s; .window = 5; .threshold = 3; }
}
backend web2 {
    .host = "1...

Varnish VCL Configuration on Gentoo Linux

Full example with load balancing and grace

vcl 4.1;
import directors;

backend web1 {
    .host = "192.168.1.10"; .port = "8080";
    .probe = { .url = "/health"; .timeout = 5s; .interval = 10s; .window = 5; .threshold = 3; }
}
backend web2 {
    .host =...

Varnish VCL Configuration on Arch Linux

Full example with load balancing and grace

vcl 4.1;
import directors;

backend web1 {
    .host = "192.168.1.10"; .port = "8080";
    .probe = { .url = "/health"; .timeout = 5s; .interval = 10s; .window = 5; .threshold = 3; }
}
backend web2 {
    .host = "...

Varnish VCL Configuration on OpenBSD 7.5

Full example with load balancing and grace

vcl 4.1;
import directors;

backend web1 {
    .host = "192.168.1.10"; .port = "8080";
    .probe = { .url = "/health"; .timeout = 5s; .interval = 10s; .window = 5; .threshold = 3; }
}
backend web2 {
    .host =...

Varnish VCL Configuration on NetBSD 10

Full example with load balancing and grace

vcl 4.1;
import directors;

backend web1 {
    .host = "192.168.1.10"; .port = "8080";
    .probe = { .url = "/health"; .timeout = 5s; .interval = 10s; .window = 5; .threshold = 3; }
}
backend web2 {
    .host = "1...

Tune Varnish Cache on AlmaLinux 9

Systemd override (/etc/systemd/system/varnish.service.d/override.conf)

[Service]
ExecStart=
ExecStart=/usr/sbin/varnishd \
    -a :80 -T localhost:6082 \
    -f /etc/varnish/default.vcl \
    -s malloc,2G \
    -p thread_pools=2 \
    -p thread_pool_min=200 \...

Tune Varnish Cache on RHEL 9

Systemd override (/etc/systemd/system/varnish.service.d/override.conf)

[Service]
ExecStart=
ExecStart=/usr/sbin/varnishd \
    -a :80 -T localhost:6082 \
    -f /etc/varnish/default.vcl \
    -s malloc,2G \
    -p thread_pools=2 \
    -p thread_pool_min=200 \
    -...

Tune Varnish Cache on Ubuntu 24.04

Systemd override (/etc/systemd/system/varnish.service.d/override.conf)

[Service]
ExecStart=
ExecStart=/usr/sbin/varnishd \
    -a :80 -T localhost:6082 \
    -f /etc/varnish/default.vcl \
    -s malloc,2G \
    -p thread_pools=2 \
    -p thread_pool_min=200 \...

Tune Varnish Cache on Debian 12

Systemd override (/etc/systemd/system/varnish.service.d/override.conf)

[Service]
ExecStart=
ExecStart=/usr/sbin/varnishd \
    -a :80 -T localhost:6082 \
    -f /etc/varnish/default.vcl \
    -s malloc,2G \
    -p thread_pools=2 \
    -p thread_pool_min=200 \...

Tune Varnish Cache on Gentoo Linux

Systemd override (/etc/systemd/system/varnish.service.d/override.conf)

[Service]
ExecStart=
ExecStart=/usr/sbin/varnishd \
    -a :80 -T localhost:6082 \
    -f /etc/varnish/default.vcl \
    -s malloc,2G \
    -p thread_pools=2 \
    -p thread_pool_min=200 \...

Tune Varnish Cache on Arch Linux

Systemd override (/etc/systemd/system/varnish.service.d/override.conf)

[Service]
ExecStart=
ExecStart=/usr/sbin/varnishd \
    -a :80 -T localhost:6082 \
    -f /etc/varnish/default.vcl \
    -s malloc,2G \
    -p thread_pools=2 \
    -p thread_pool_min=200 \...

Tune Varnish Cache on OpenBSD 7.5

Systemd override (/etc/systemd/system/varnish.service.d/override.conf)

[Service]
ExecStart=
ExecStart=/usr/sbin/varnishd \
    -a :80 -T localhost:6082 \
    -f /etc/varnish/default.vcl \
    -s malloc,2G \
    -p thread_pools=2 \
    -p thread_pool_min=200 \...

Tune Varnish Cache on NetBSD 10

Systemd override (/etc/systemd/system/varnish.service.d/override.conf)

[Service]
ExecStart=
ExecStart=/usr/sbin/varnishd \
    -a :80 -T localhost:6082 \
    -f /etc/varnish/default.vcl \
    -s malloc,2G \
    -p thread_pools=2 \
    -p thread_pool_min=200 \...