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--- протокол_carp [2016/04/15 10:44]
val
+++ протокол_carp [2021/07/08 08:04] (current)
admin [Смена ролей узлов]
@@ Line 1: / Line 1: @@
 ====== Протокол CARP ======
+  * [[https://ru.wikipedia.org/wiki/VRRP|VRRP]]
+  * [[https://ru.wikipedia.org/wiki/CARP|CARP]]
   * [[Сервис NTP]]
-===== Ubuntu =====
+===== Debian/Ubuntu =====
+  * [[https://serverfault.com/questions/298776/ucarp-promote-slave-to-master|ucarp: promote slave to master]]
+  * [[https://askubuntu.com/questions/1149275/using-netplan-with-ucarp|Using netplan with ucarp]] + systemd
 ==== Установка ====
 <code>
-root@nodeN:~# apt-get install ucarp
+root@nodeN:~# apt install ucarp
 </code>
@@ Line 15: / Line 19: @@
 root@nodeN:~# less /etc/network/if-up.d/ucarp
-root@nodeN:~# ifdown eth0
 root@nodeN:~# cat /etc/network/interfaces
@@ Line 25: / Line 27: @@
         address 192.168.X.N
         netmask 255.255.255.0
         ucarp-vid 1
         ucarp-vip 192.168.X.254
@@ Line 34: / Line 37: @@
 ...
 </code><code>
-root@nodeN:~# cat /usr/share/ucarp/vip-up
+root@nodeN:~# less /usr/share/ucarp/vip-up
 </code><code>
 #!/bin/sh
@@ Line 40: / Line 43: @@
 /sbin/ifup $1:ucarp
 </code><code>
-root@nodeN:~# cat /usr/share/ucarp/vip-down
+root@nodeN:~# less /usr/share/ucarp/vip-down
 </code><code>
 #!/bin/sh
@@ Line 49: / Line 52: @@
 ==== Запуск ====
 <code>
+root@nodeN:~# ifdown --force eth0
 root@nodeN:~# ifup eth0
 </code>
 ==== Проверка ====
+  * [[Сигналы#Отправка сигнала]]
 <code>
 root@nodeN:~# ps ax | grep carp
 root@nodeN:~# ifconfig eth0:ucarp
+root@nodeN:~# pkill -USR1 ucarp
+root@nodeN:~# killall -USR1 ucarp
+root@nodeN:~# grep carp /var/log/syslog
 </code>
-=== Остановка ===
+==== Смена ролей узлов ====
 <code>
-root@nodeN:~# ifdown eth0:ucarp
+wincmd:\> arp -a
+masternode# pkill -USR2 ucarp
+masternode# killall -USR2 ucarp
+wincmd:\> arp -a
 </code>
 ===== FreeBSD (user land) =====
@@ Line 68: / Line 89: @@
 ==== Установка ====
 <code>
-[nodeN:~] # pkg_add -r ucarp
+[nodeN:~] # pkg install ucarp
 </code>
 ==== Настройка ====
 <code>
-[node1:~] # cat /etc/rc.conf
+[nodeN:~] # less /usr/local/etc/rc.d/ucarp
+[nodeN:~] # cat /etc/rc.conf
 </code><code>
 ...
+ucarp_src="192.168.X.N"
 ucarp_enable="YES"
 ucarp_vhid="1"
 ucarp_if="em0"
-ucarp_src="192.168.X.1"
 ucarp_addr="192.168.X.254"
-# ucarp_advskew="50"
-# ucarp_preempt="YES" # For always use master with lover advskew
 ucarp_pass="secret"
-ucarp_upscript="/usr/local/etc/vip-up.sh"
+ucarp_upscript="/usr/local/sbin/ucarp-up"
-ucarp_downscript="/usr/local/etc/vip-down.sh"
+ucarp_downscript="/usr/local/sbin/ucarp-down"
 </code><code>
-[node2:~] # cat /etc/rc.conf
+[nodeN:~] # cat /usr/local/sbin/ucarp-up
 </code><code>
+#!/bin/sh
 ...
-ucarp_enable="YES"
+/sbin/ifconfig "$1" alias "$2" netmask 255.255.255.255
-ucarp_vhid="1"
-ucarp_if="em0"
-ucarp_src="192.168.X.2"
-ucarp_addr="192.168.X.254"
-# ucarp_advskew="100"
-# ucarp_preempt="YES"
-ucarp_pass="secret"
-ucarp_upscript="/usr/local/etc/vip-up.sh"
-ucarp_downscript="/usr/local/etc/vip-down.sh"
 </code><code>
-[nodeN:~] # cat /usr/local/etc/vip-up.sh
+[nodeN:~] # cat /usr/local/sbin/ucarp-down
 </code><code>
 #!/bin/sh
-ifconfig em0 inet 192.168.X.254/32 alias
+...
+/sbin/ifconfig "$1" -alias "$2"
+...
 </code><code>
-[nodeN:~] # chmod +x /usr/local/etc/vip-up.sh
+[nodeN:~] # service ucarp start
-</code><code>
+</code>
-[nodeN:~] # cat /usr/local/etc/vip-down.sh
+===== Дополнительные материалы =====
+  * [[http://serverfault.com/questions/179263/multiple-ucarp-vips-on-single-interface-with-debian-ubuntu|Multiple UCARP VIPs on single Interface with Debian/Ubuntu]]
+==== Ubuntu вариант запуска процесса вручную ====
+=== Установка ===
+<code>
+root@nodeN:~# apt-get install ucarp
+</code>
+=== Настройка ===
+<code>
+root@nodeN:~# cat /etc/vip-up.sh
 </code><code>
 #!/bin/sh
-ifconfig em0 inet 192.168.X.254/32 -alias
+/sbin/ip addr add 192.168.X.254/32 dev "$1"
 </code><code>
-[nodeN:~] # chmod +x /usr/local/etc/vip-down.sh
+root@nodeN:~# cat /etc/vip-down.sh
 </code><code>
-[nodeN:~] # /usr/local/etc/rc.d/ucarp start
+#!/bin/sh
+/sbin/ip addr del 192.168.X.254/32 dev "$1"
+</code><code>
+root@nodeN:~# chmod +x /etc/vip-up.sh /etc/vip-down.sh
 </code>
-==== Дополнительные материалы ====
+=== Запуск (можно прописать в /etc/rc.local) ===
+<code>
+root@node1:~# ucarp -i eth0 -s 192.168.X.1 -v 1 -p secret -a 192.168.X.254 -u /etc/vip-up.sh -d /etc/vip-down.sh -z -B
-  * [[http://serverfault.com/questions/179263/multiple-ucarp-vips-on-single-interface-with-debian-ubuntu|Multiple UCARP VIPs on single Interface with Debian/Ubuntu]]
+root@node2:~# ucarp -i eth0 -s 192.168.X.2 -v 1 -p secret -a 192.168.X.254 -u /etc/vip-up.sh -d /etc/vip-down.sh -z -B
+</code>
+Примечания:
+  * Не смотря на ОБЯЗАТЕЛЬНОЕ наличие ключа -a 192.168.X.254 адрес повторно приходится присваивать/удалять в скриптах
+  * If you want a "preferred" master to immediately become a master even if another host is already the master: a) add the --preempt (or -P) switch to *all* hosts b)use a lower skew (-k) or a lower base for the "preferred" one.
+=== Проверка ===
+<code>
+root@nodeN:~# ip addr show dev eth0
+</code>
+=== Остановка ===
+<code>
+root@nodeN:~# killall ucarp
+</code>
-=== FreeBSD (kernel land) ===
+==== FreeBSD (kernel land) ====
   * [[http://www.freebsd.org/doc/en/books/handbook/carp.html|Common Address Redundancy Protocol (CARP) (freebsd handbook)]]
@@ Line 130: / Line 179: @@
 [[Управление ядром и модулями в FreeBSD]]
-== Настройка ==
+=== Настройка ===
 <code>
@@ Line 154: / Line 203: @@
 </code>
-== Проверка ==
+=== Проверка ===
 <code>
 nodeN# ifconfig carp0

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