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|
(* Test for keepalived lens *)
module Test_keepalived =
let conf = "! This is a comment
! Configuration File for keepalived
global_defs {
! this is who emails will go to on alerts
notification_email {
admins@example.com
fakepager@example.com
! add a few more email addresses here if you would like
}
notification_email_from admins@example.com
smtp_server 127.0.0.1 ! I use the local machine to relay mail
smtp_connect_timeout 30
! each load balancer should have a different ID
! this will be used in SMTP alerts, so you should make
! each router easily identifiable
lvs_id LVS_EXAMPLE_01
}
vrrp_sync_group VG1 {
group {
inside_network # name of vrrp_instance (below)
outside_network # One for each moveable IP.
}
}
vrrp_instance VI_1 {
state MASTER
interface eth0
lvs_sync_daemon_interface eth0
! each virtual router id must be unique per instance name!
virtual_router_id 51
! MASTER and BACKUP state are determined by the priority
! even if you specify MASTER as the state, the state will
! be voted on by priority (so if your state is MASTER but your
! priority is lower than the router with BACKUP, you will lose
! the MASTER state)
! I make it a habit to set priorities at least 50 points apart
! note that a lower number is lesser priority - lower gets less vote
priority 150
! how often should we vote, in seconds?
advert_int 1
! send an alert when this instance changes state from MASTER to BACKUP
smtp_alert
! this authentication is for syncing between failover servers
! keepalived supports PASS, which is simple password
! authentication
! or AH, which is the IPSec authentication header.
! I don't use AH
! yet as many people have reported problems with it
authentication {
auth_type PASS
auth_pass example
}
! these are the IP addresses that keepalived will setup on this
! machine. Later in the config we will specify which real
! servers are behind these IPs
! without this block, keepalived will not setup and takedown the
! any IP addresses
virtual_ipaddress {
192.168.1.11
10.234.66.146/32 dev vlan933 # parse it well
! and more if you want them
}
}
virtual_server 192.168.1.11 22 {
delay_loop 6
! use round-robin as a load balancing algorithm
lb_algo rr
! we are doing NAT
lb_kind NAT
nat_mask 255.255.255.0
protocol TCP
! there can be as many real_server blocks as you need
real_server 10.20.40.10 22 {
! if we used weighted round-robin or a similar lb algo,
! we include the weight of this server
weight 1
! here is a health checker for this server.
! we could use a custom script here (see the keepalived docs)
! but we will just make sure we can do a vanilla tcp connect()
! on port 22
! if it fails, we will pull this realserver out of the pool
! and send email about the removal
TCP_CHECK {
connect_timeout 3
connect_port 22
}
}
}
virtual_server_group DNS_1 {
192.168.0.1 22
10.234.55.22-25 36
10.45.58.59/32 27
}
! that's all
"
test Keepalived.lns get conf =
{ "#comment" = "This is a comment" }
{ "#comment" = "Configuration File for keepalived" }
{}
{ "global_defs"
{ "#comment" = "this is who emails will go to on alerts" }
{ "notification_email"
{ "email" = "admins@example.com" }
{ "email" = "fakepager@example.com" }
{ "#comment" = "add a few more email addresses here if you would like" } }
{ "notification_email_from" = "admins@example.com" }
{ }
{ "smtp_server" = "127.0.0.1"
{ "#comment" = "I use the local machine to relay mail" } }
{ "smtp_connect_timeout" = "30" }
{}
{ "#comment" = "each load balancer should have a different ID" }
{ "#comment" = "this will be used in SMTP alerts, so you should make" }
{ "#comment" = "each router easily identifiable" }
{ "lvs_id" = "LVS_EXAMPLE_01" } }
{}
{ "vrrp_sync_group" = "VG1"
{ "group"
{ "inside_network"
{ "#comment" = "name of vrrp_instance (below)" } }
{ "outside_network"
{ "#comment" = "One for each moveable IP." } } } }
{}
{ "vrrp_instance" = "VI_1"
{ "state" = "MASTER" }
{ "interface" = "eth0" }
{ }
{ "lvs_sync_daemon_interface" = "eth0" }
{ }
{ "#comment" = "each virtual router id must be unique per instance name!" }
{ "virtual_router_id" = "51" }
{ }
{ "#comment" = "MASTER and BACKUP state are determined by the priority" }
{ "#comment" = "even if you specify MASTER as the state, the state will" }
{ "#comment" = "be voted on by priority (so if your state is MASTER but your" }
{ "#comment" = "priority is lower than the router with BACKUP, you will lose" }
{ "#comment" = "the MASTER state)" }
{ "#comment" = "I make it a habit to set priorities at least 50 points apart" }
{ "#comment" = "note that a lower number is lesser priority - lower gets less vote" }
{ "priority" = "150" }
{ }
{ "#comment" = "how often should we vote, in seconds?" }
{ "advert_int" = "1" }
{ }
{ "#comment" = "send an alert when this instance changes state from MASTER to BACKUP" }
{ "smtp_alert" }
{ }
{ }
{ "#comment" = "this authentication is for syncing between failover servers" }
{ "#comment" = "keepalived supports PASS, which is simple password" }
{ "#comment" = "authentication" }
{ "#comment" = "or AH, which is the IPSec authentication header." }
{ "#comment" = "I don't use AH" }
{ "#comment" = "yet as many people have reported problems with it" }
{ "authentication"
{ "auth_type" = "PASS" }
{ "auth_pass" = "example" } }
{ }
{ "#comment" = "these are the IP addresses that keepalived will setup on this" }
{ "#comment" = "machine. Later in the config we will specify which real" }
{ "#comment" = "servers are behind these IPs" }
{ "#comment" = "without this block, keepalived will not setup and takedown the" }
{ "#comment" = "any IP addresses" }
{ }
{ "virtual_ipaddress"
{ "ipaddr" = "192.168.1.11" }
{ "ipaddr" = "10.234.66.146"
{ "prefixlen" = "32" }
{ "dev" = "vlan933" }
{ "#comment" = "parse it well" } }
{ "#comment" = "and more if you want them" } } }
{ }
{ "virtual_server"
{ "ip" = "192.168.1.11" }
{ "port" = "22" }
{ "delay_loop" = "6" }
{ }
{ "#comment" = "use round-robin as a load balancing algorithm" }
{ "lb_algo" = "rr" }
{ }
{ "#comment" = "we are doing NAT" }
{ "lb_kind" = "NAT" }
{ "nat_mask" = "255.255.255.0" }
{ }
{ "protocol" = "TCP" }
{ }
{ "#comment" = "there can be as many real_server blocks as you need" }
{ }
{ "real_server"
{ "ip" = "10.20.40.10" }
{ "port" = "22" }
{ }
{ "#comment" = "if we used weighted round-robin or a similar lb algo," }
{ "#comment" = "we include the weight of this server" }
{ }
{ "weight" = "1" }
{ }
{ "#comment" = "here is a health checker for this server." }
{ "#comment" = "we could use a custom script here (see the keepalived docs)" }
{ "#comment" = "but we will just make sure we can do a vanilla tcp connect()" }
{ "#comment" = "on port 22" }
{ "#comment" = "if it fails, we will pull this realserver out of the pool" }
{ "#comment" = "and send email about the removal" }
{ "TCP_CHECK"
{ "connect_timeout" = "3" }
{ "connect_port" = "22" } } } }
{ }
{ "virtual_server_group" = "DNS_1"
{ "vip"
{ "ipaddr" = "192.168.0.1" }
{ "port" = "22" } }
{ "vip"
{ "ipaddr" = "10.234.55.22-25" }
{ "port" = "36" } }
{ "vip"
{ "ipaddr" = "10.45.58.59"
{ "prefixlen" = "32" } }
{ "port" = "27" } } }
{ }
{ "#comment" = "that's all" }
|