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--- linux:skoleni:ha [2015/02/26 01:48]
admin
+++ linux:skoleni:ha [2016/12/05 15:30] (current)
admin
@@ Line 1: / Line 1: @@
+====== HA - basics ======
 Note: Fibre channel - cheap stuff!!!
@@ Line 27: / Line 28: @@
   /sbin/modprobe drbd
-Partition DRBD on both machines (the ugly way):
+====Partition DRBD on both machines (the ugly way):====
+If your linux box doesn't detect new disk automaticly, you can try rescanning the scsi bus
+   echo "- - -" >/sys/class/scsi_host/host0/scan
   [root@node1 ~]# fdisk -cu /dev/sdb
@@ Line 35: / Line 40: @@
   [root@node2 ~]# lvcreate -L 4GB -n mail_disk vg_boruvka
-<file bash>
+==== Setup the network ====
+<file bash ifcfg-eth1>
+DEVICE="eth1"
+BOOTPROTO="none"
+HWADDR="00:0C:29:DA:26:E9"
+IPADDR="10.1.1.1"
+NETMASK="255.255.255.252"
+IPV6INIT="yes"
+NM_CONTROLLED="no"
+ONBOOT="yes"
+TYPE="Ethernet"
+</file>
+==== DRBD config ====
+<code bash>
 resource mail_disk {
+ protocol C;
  startup {
 	 wfc-timeout 30;
@@ Line 68: / Line 88: @@
  }
 }
-</file>
+</code>
 Initialize devices (very similar to pvcreate or mkfs.ext4):
@@ Line 87: / Line 107: @@
 Careful reader could have notices we are having Diskless/Inconsistent. Initialize (create-dm) the disk again or zero it (dd if=/dev/zero) and initialize again and thing should be fine.
-  [root@node1 ~]# drbdadm -- --overwrite-data-of-peer primary repdata
+  [root@node1 ~]# drbdadm -- --overwrite-data-of-peer primary mail_disk
+====== UCARP (VRRP) ======
+Open the page and install epel
+http://mirror.hosting90.cz/epel/6/x86_64/repoview/epel-release.html
+Or try using this direct link, but might be unavailable later
+   yum install http://mirror.hosting90.cz/epel/6/x86_64/epel-release-6-8.noarch.rpm
+Install ucarp
+   yum install ucarp
+config
+<file bash /etc/ucarp.d/vip-001.conf>
+  VIP_ADDRESS="192.168.5.123"
+</file>
+<file bash /etc/ucarp.d/vip-common.conf>
+PASSWORD="love"
+BIND_INTERFACE="eth0"
+SOURCE_ADDRESS="192.168.5.39"
+# If you have extra options to add, see "ucarp --help" output
+OPTIONS="--shutdown --preempt"
+</file>

linux/skoleni/ha.1424911685.txt.gz · Last modified: 2015/02/26 01:48 by admin