keepalived

Keepalived 配置概要

global_defs {
    notification_email {
        email
        email
    }
    notification_email_from email
    smtp_server host
    smtp_connect_timeout num
    lvs_id string
}

Keyword	Definition	Type
global_defs	identify the global def configuration block
notification_email	email accounts that will receive the notification mail	List
notification_email_from	email to use when processing “MAIL FROM:” SMTP command	List
smtp_server remote SMTP	server to use for sending mail notifications	alphanum
smtp_connection_timeout	specify a timeout for SMTP stream processing	numerical
lvs_id	specify the name of the LVS director	alphanum

虚拟服务器定义概要

virtual_server (@IP PORT)|(fwmark num) {
    delay_loop num
    lb_algo rr|wrr|lc|wlc|sh|dh|lblc
    lb_kind NAT|DR|TUN
    (nat_mask @IP)
    persistence_timeout num
    persistence_granularity @IP
    virtualhost string
    protocol TCP|UDP

    sorry_server @IP PORT
    real_server @IP PORT {
        weight num
        TCP_CHECK {
            connect_port num
            connect_timeout num
        }
    }
    real_server @IP PORT {
        weight num
        MISC_CHECK {
            misc_path /path_to_script/script.sh
            (or misc_path “ /path_to_script/script.sh ”)
        }
    }
}
real_server @IP PORT {
    weight num
    HTTP_GET|SSL_GET {
        url { # You can add multiple url block
            path alphanum
            digest alphanum
        }
        connect_port num
        connect_timeout num
        retry num
        delay_before_retry num
    }
}

Keyword	Definition	Type
virtual_server	identify a virtual server definition block
fwmark	specify that virtual server is a FWMARK
delay_loop	specify in seconds the interval between checks	numerical
lb_algo	select a specific scheduler (rr|wrr|lc|wlc...)	string
lb_kind	select a specific forwarding method (NAT|DR|TUN)	string
persistence_timeout	specify a timeout value for persistent connections	numerical
persistence_granularity	specify a granularity mask for persistent connections
virtualhost	specify a HTTP virtualhost to use for HTTP|SSL_GET	alphanum
protocol	specify the protocol kind (TCP|UDP)	numerical
sorry_server	server to be added to the pool if all real servers are down
real_server	specify a real server member
weight	specify the real server weight for load balancing decisions	numerical
TCP_CHECK	check real server availability using TCP connect
MISC_CHECK	check real server availability using user defined script
misc_path	identify the script to run with full path	path
HTTP_GET	check real server availability using HTTP GET request
SSL_GET	check real server availability using SSL GET request
url	identify a url definition block
path	specify the url path	alphanum
digest	specify the digest for a specific url path	alphanum
connect_port	connect remote server on specified TCP port	numerical
connect_timeout	connect remote server using timeout	numerical
retry	maximum number of retries	numerical
delay_before_retry	delay between two successive retries	numerical

VRRP 实例定义概要

vrrp_sync_group string {
    group {
        string
        string
    }
    notify_master /path_to_script/script_master.sh
        (or notify_master “ /path_to_script/script_master.sh ”)
    notify_backup /path_to_script/script_backup.sh
        (or notify_backup “/path_to_script/script_backup.sh ”)
    notify_fault /path_to_script/script_fault.sh
        (or notify_fault “ /path_to_script/script_fault.sh ”)
}
vrrp_instance string {
    state MASTER|BACKUP
    interface string
    mcast_src_ip @IP
    lvs_sync_daemon_interface string
    virtual_router_id num
    priority num
    advert_int num
    smtp_alert
    authentication {
        auth_type PASS|AH
        auth_pass string
    }
    virtual_ipaddress { # Block limited to 20 IP addresses
        @IP
        @IP
        @IP
    }
    virtual_ipaddress_excluded { # Unlimited IP addresses
        @IP
        @IP
        @IP
    }
    notify_master /path_to_script/script_master.sh
        (or notify_master “ /path_to_script/script_master.sh ”)
    notify_backup /path_to_script/script_backup.sh
        (or notify_backup “ /path_to_script/script_backup.sh ”)
    notify_fault /path_to_script/script_fault.sh
        (or notify_fault “ /path_to_script/script_fault.sh ”)
}

Keyword	Definition	Type
vrrp_instance	identify a VRRP instance definition block
state	specify the instance state in standard use
Interface	specify the network interface for the instance to run on	string
mcast_src_ip	specify the src IP address value for VRRP adverts IP header
lvs_sync_daemon_inteface	specify the network interface for the LVS sync_daemon to run on	string
virtual_router_id	specify to which VRRP router id the instance belongs	numerical
priority	specify the instance priority in the VRRP router	numerical
advert_int	specify the advertisement interval in seconds (set to 1)	numerical
smtp_alert	Activate the SMTP notification for MASTER state transition
authentication	identify a VRRP authentication definition block
auth_type	specify which kind of authentication to use (PASS|AH)
auth_pass	specify the password string to use	string
virtual_ipaddress	identify a VRRP VIP definition block
virtual_ipaddress_excluded	identify a VRRP VIP excluded definition block (not protocol VIPs)
notify_master	specify a shell script to be executed during transition to master state	path
notify_backup	specify a shell script to be executed during transition to backup state	path
notify_fault	specify a shell script to be executed during transition to fault state	path
vrrp_sync_group	Identify the VRRP synchronization instances group	string