Where can I find actual haproxy and keepalived deb packages for Raspberry Pi and how I install high availability?

At https://packages.raspberry-hosting.com/ we have provided for download the latest version of the HAProxy for Raspberry Pi. There is also a init script. Packages will be updated regularly.

Raspberry HAProxy

What you need:

4x Raspberry Pi
5x IP address (1 IP is need for Virtual Interface - VIF)

VIF - 192.168.1.1
rpi-haproxy01 (master) 192.168.1.2
rpi-haproxy02 (slave) 192.168.1.3
rpi-web01 (webserver 01) 192.168.1.4
rpi-web02 (webserver 02) 192.168.1.5

Installation HAProxy:

1. Update/upgrade

root@haproxy01:~# apt-get update && apt-get -y upgrade

2. Download and install the HAProxy deb package from the following address: (Check on https://packages.raspberry-hosting.com/ for last version)

root@haproxy01:~# wget https://packages.raspberry-hosting.com/haproxy-raspberry-pi/haproxy_1.5.9-1_armhf.deb
install:
root@haproxy01:~# dpkg -i ./haproxy_1.5.9-1_armhf.deb

2. Add BEST-HOSTING repository with all packages: (Read more: FREE Raspbian repository )

root@haproxy01:~# apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 0x908332071dd2e32e
root@haproxy01:~# cat > /etc/apt/sources.list.d/best-hosting.list
deb http://deb.best-hosting.cz/debian/ raspberry main
root@haproxy01:~# apt-get update
root@haproxy01:~# apt-cache search bh-
root@haproxy01:~# apt-get install bh-haproxy

3. Download HAProxy init script in /etc/init.d/ and add it permissions to execute:

root@haproxy01:~# wget https://packages.raspberry-hosting.com/haproxy-raspberry-pi/etc/init.d/haproxy -O /etc/init.d/haproxy
root@haproxy01:~# chmod +x /etc/init.d/haproxy

root@haproxy01:~# wget http://deb.best-hosting.cz/_scripts_/haproxy/init.d/haproxy -O /etc/init.d/haproxy
root@haproxy01:~# chmod +x /etc/init.d/haproxy

4. Allowing execution HAProxy even after reboot:

root@haproxy01:~# update-rc.d haproxy defaults

6. Create the following folder:

root@haproxy01:~# mkdir /etc/haproxy/

7. Download and create basic config file:

root@haproxy01:~# wget https://packages.raspberry-hosting.com/haproxy-raspberry-pi/etc/haproxy/haproxy.cfg -O /etc/haproxy/haproxy.cfg

root@haproxy01:~# wget http://deb.best-hosting.cz/_scripts_/haproxy/haproxy.cfg -O /etc/haproxy/haproxy.cfg

8. Create haproxy user and group:

root@haproxy01:~# adduser --group --system --no-create-home --disabled-password --disabled-login haproxy
Adding system user haproxy (UID 107) ...
Adding new group haproxy (GID 110) ...
Adding new user haproxy (UID 107) with group haproxy ...
Not creating home directory /home/haproxy

9. Check haproxy congfiguration in /etc/haproxy/haproxy.cfg and change IP address to your. This config file is will be same on both haproxy devices

Change x.x.x.x to your IP address ( in this example: 192.168.1.4 and 192.168.1.5 )

10. Run HAProxy and test is running:

root@haproxy01:~# /etc/init.d/haproxy restart
Checking HAProxy configuration first
Configuration file is valid
Everything looks fine
[ ok ] Restarting haproxy: haproxy.
root@haproxy01:~# ps ax | grep haproxy
 2093 ?        Ss     0:00 /usr/local/sbin/haproxy -f /etc/haproxy/haproxy.cfg -D -p /var/run/haproxy.pid
 2112 pts/0    S+     0:00 grep haproxy

11. Repeat step 1 to 10 on haproxy02

HAProxy statistics report:

For haproxy01: http://192.168.1.2:8880/
For haproxy02: http://192.168.1.3:8880/
login: pi
password: raspberry

Well done!


Installation Keepalived:

1. Install the keepalived deb package:

root@haproxy01:~# wget https://packages.raspberry-hosting.com/keepalived-raspberry-pi/keepalived_1.2.13-1_armhf.deb
root@haproxy01:~# dpkg -i ./keepalived_1.2.13-1_armhf.deb

root@haproxy01:~# apt-get install bh-keepalived

2. Check keepalived version:

root@haproxy01:~# keepalived -v
Keepalived v1.2.x (xx/xx,xxxx)

3. Download keepalived init script in /etc/init.d/ and add it permissions to execute:

root@haproxy01:~# wget https://packages.raspberry-hosting.com/keepalived-raspberry-pi/etc/init.d/keepalived -O /etc/init.d/keepalived
root@haproxy01:~# chmod +x /etc/init.d/keepalived

root@haproxy01:~# wget http://deb.best-hosting.cz/_scripts_/keepalived/init.d/keepalived -O /etc/init.d/keepalived
root@haproxy01:~# chmod +x /etc/init.d/keepalived

4. Allowing execution keepalived even after reboot:

root@haproxy01:~# update-rc.d keepalived defaults

5. Start keepalived a check is running:

root@haproxy01:~# /etc/init.d/keepalived start
[ ok ] Starting keepalived: keepalived.
root@haproxy01:~# ps ax | grep keep
 6883 ?        Ss     0:00 /usr/local/sbin/keepalived
 6885 ?        S      0:00 /usr/local/sbin/keepalived
 6886 ?        S      0:00 /usr/local/sbin/keepalived
 6908 pts/0    S+     0:00 grep keep

6. Repeat step 1 to 5 on haproxy02

7. Download config file for keepalived and save it to /etc/keepalived/keepalived.conf

root@haproxy01:~#  wget https://packages.raspberry-hosting.com/keepalived-raspberry-pi/etc/keepalived/keepalived.conf -O  /etc/keepalived/keepalived.conf

root@haproxy01:~#  wget http://deb.best-hosting.cz/_scripts_/keepalived/keepalived.conf -O  /etc/keepalived/keepalived.conf

8. Config for haproxy01:

global_defs {
    lvs_id haproxy01
}
vrrp_sync_group SyncGroup01 {
    group {
        VI_1
    }
}
vrrp_script chkhaproxy {
    script "/usr/bin/killall -0 haproxy"
    script "/usr/sbin/service haproxy start"
    interval 9
    timeout 3
    weight 20
    rise 2
    fall 4
}
vrrp_instance VI_1 {
    interface eth0                # interface to monitor
    state MASTER
    virtual_router_id 51          # Assign one ID for this route
    priority 101                  # 101 on MASTER, 100 on BACKUP
    advert_int 5
    authentication {
        auth_type PASS
        auth_pass 6c7448fdece8f61841c60293f9a8bd3c
    }
    virtual_ipaddress {
        192.168.1.1         # the virtual IP
    }
    track_script {
        chkhaproxy
    }
}

9. Config for haproxy02:

global_defs {
    lvs_id haproxy02
}
vrrp_sync_group SyncGroup01 {
    group {
        VI_1
    }
}
vrrp_script chkhaproxy {
    script "/usr/bin/killall -0 haproxy"
    script "/usr/sbin/service haproxy start"
    interval 9
    timeout 3
    weight 20
    rise 2
    fall 4
}
vrrp_instance VI_1 {
    interface eth0                # interface to monitor
    state BACKUP
    virtual_router_id 51          # Assign one ID for this route
    priority 100                  # 101 on MASTER, 100 on BACKUP
    advert_int 5
    authentication {
        auth_type PASS
        auth_pass 6c7448fdece8f61841c60293f9a8bd3c
    }
    virtual_ipaddress {
        192.168.1.1         # the virtual IP
    }
    track_script {
        chkhaproxy
    }
}

10. Restart both keepalived on haproxy devices:

root@haproxy01:~# /etc/init.d/keepalived restart
and
root@haproxy02:~# /etc/init.d/keepalived restart

11. Check VIF IP address:

root@haproxy01:~# ip a sh eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether b8:27:eb:fb:e2:7e brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.2/24 brd 193.150.14.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet 192.168.1.1/32 scope global eth0
       valid_lft forever preferred_lft forever
root@haproxy02:~# ip a sh eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether b8:27:eb:6e:03:ad brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.3/24 brd 193.150.14.255 scope global eth0
       valid_lft forever preferred_lft forever

12. Test stop keepalived on haproxy01:

root@haproxy01:~# /etc/init.d/keepalived stop
[ ok ] Stopping keepalived: keepalived.
root@haproxy01:~# ip a sh eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether b8:27:eb:fb:e2:7e brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.2/24 brd 193.150.14.255 scope global eth0
       valid_lft forever preferred_lft forever
root@haproxy02:~# ip a sh eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether b8:27:eb:6e:03:ad brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.3/24 brd 193.150.14.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet 192.168.1.1/32 scope global eth0
       valid_lft forever preferred_lft forever

Nice. You have done. Enjoy!

Don't remember! When you update package to new version, be very careful and keep a back-up of all configuration files from /etc/haproxy/ and /etc/keepalived !

Sources:
FREE Raspbian repository
HAPROXY Manual 1.5
KeepAlived
Raspberry Pi Packages