Keepalived : Set Email Notification2023/10/11 |
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Set Email Notification when failover or failback happened. This example is based on the environment like follows.
VIP:10.0.0.30
+----------------------+ | +----------------------+
| [node01.srv.world] |10.0.0.51 | 10.0.0.52| [node02.srv.world] |
| Keepalived#1 +----------+----------+ Keepalived#2 |
| | | |
+----------------------+ +----------------------+
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| [1] |
Install SMTP Server on all Nodes, refer to here. |
| [2] | In addition to basic Keepalived settings like here, set Email notification on all Nodes. |
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root@node01:~#
vi /etc/keepalived/keepalived.conf
global_defs {
router_id node01
# add SMTP setting
notification_email {
root@localhost
}
notification_email_from root@node01.srv.world
smtp_server localhost
smtp_connect_timeout 30
}
vrrp_instance VRRP1 {
state MASTER
# nopreempt
interface enp1s0
virtual_router_id 101
priority 200
advert_int 1
virtual_ipaddress {
10.0.0.30/24
}
# add
smtp_alert
}
root@node01:~# systemctl reload keepalived
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| [3] | That's OK. Verify Email notification. |
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# node that some troubles happened root@node01:~# mail
"/var/mail/root": 1 message 1 unread
>U 1 root@node01.srv.wo Wed Oct 11 09:58 19/608 [node01] VRRP Instance VR
? 1
Return-Path: <root@node01.srv.world>
X-Original-To: root@localhost
Delivered-To: root@localhost
Received: from node01.srv.world (localhost [127.0.0.1])
by node01.srv.world (Postfix) with SMTP id 4B14BE0220
for <root@localhost>; Wed, 11 Oct 2023 09:58:46 +0900 (JST)
Date: Wed, 11 Oct 2023 09:58:46 +0900
From: root@node01.srv.world
Subject: [node01] VRRP Instance VRRP1 - Entering FAULT state
X-Mailer: Keepalived
To: root@localhost
Message-Id: <20231011005846.4B14BE0220@node01.srv.world>
X-IMAPbase: 1696985936 2
X-UID: 1
Status: O
=> VRRP Instance is no longer owning VRRP VIPs <=
# backup node root@node02:~# mail
"/var/mail/root": 2 messages 2 new
>N 1 root@node01.srv.wo Wed Oct 11 09:58 16/540 [node02] VRRP Instance VR
N 2 root@node01.srv.wo Wed Oct 11 10:00 16/546 [node02] VRRP Instance VR
? 1
Return-Path: <root@node01.srv.world>
X-Original-To: root@localhost
Delivered-To: root@localhost
Received: from node02.srv.world (localhost [127.0.0.1])
by node02.srv.world (Postfix) with SMTP id 514ACE0222
for <root@localhost>; Wed, 11 Oct 2023 09:58:49 +0900 (JST)
Date: Wed, 11 Oct 2023 09:58:49 +0900
From: root@node01.srv.world
Subject: [node02] VRRP Instance VRRP1 - Entering MASTER state
X-Mailer: Keepalived
To: root@localhost
Message-Id: <20231011005849.514ACE0222@node02.srv.world>
=> VRRP Instance is now owning VRRP VIPs <=
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