Qiita Teams that are logged in
You are not logged in to any team

Log in to Qiita Team
Community
OrganizationAdvent CalendarQiitadon (β)
Service
Qiita JobsQiita ZineQiita Blog
0
Help us understand the problem. What is going on with this article?
@YuuT_38

Centos7 と Cisco でVRRP構成してみたメモ

#!/usr/doc/公式ドキュメント

参考リンク

構成

  • CentOS7 (uname -r 3.10.0-1062.1.1.el7.x86_64); Giga Ethernet x1; Wi-Fi x1
  • Cisco 841m (show ver Cisco IOS Software, C800M Software (C800M-UNIVERSALK9-M), Version 15.5(3)M4a,); Giga Ethernet(LAN) x4

  • サーバをメイン通信経路とする

  • サーバが落ちたとしてもNWがつながったままになっている想定

  • Cisco Router はバックアップとして使用

  [----- Softbank AIR -----]
    | Wifi0        Port0 |
    |                    |
    | eth0         Gi0/5 |
[Centos7]           [Cisco841m]
    | wlan0        Gi0/0 |
    |             Vlan10 |
    |                    |
----+- 192.168.10.0/24 --+----
  • VRRP IPv4 アドレス: 192.168.10.254
  • VRRP Preempt = yes
  • VRRP Adv timer = 3s
  • VRRP Master = Centos7
  • VRRP Backup = Cisco841m

もくじ

  1. [Cisco側]設定
  2. [Centos側]keepalived インストール
  3. [Centos側]F/W 設定
  4. [Centos側]設定
  5. [Cisco側]確認
  6. [Centos側]確認

[Cisco側]設定

C841M#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
C841M(config)#
C841M(config)#track 10 interface GigabitEthernet0/5 line-protocol
C841M(config)# delay up 30
C841M(config)#
C841M(config)#vlan 10
C841M(config)#int vlan 10
C841M(config)# description TO) LAN
C841M(config)# ip addr 192.168.10.252 255.255.255.0
C841M(config)# vrrp 10 ip 192.168.10.254
C841M(config)# vrrp 10 timers advertise 3
C841M(config)# vrrp 10 preempt delay minimum 30
C841M(config)# vrrp 10 track 10 decrement 15 
C841M(config)# end
C841M# 

[Centos側]keepalived インストール

[user00@centos7 ~]$ sudo yum -y install keepalived
[sudo] password for user00:
Loaded plugins: fastestmirror, priorities, product-id, search-disabled-repos, subscription-manager

This system is not registered with an entitlement server. You can use subscription-manager to register.

Loading mirror speeds from cached hostfile
 * base: ftp.iij.ad.jp
 * epel: ftp.iij.ad.jp
 * extras: ftp.iij.ad.jp
 * updates: ftp.iij.ad.jp
168 packages excluded due to repository priority protections
Resolving Dependencies
--> Running transaction check
---> Package keepalived.x86_64 0:1.3.5-16.el7 will be installed
keepalived --version
--> Finished Dependency Resolution

Dependencies Resolved

====================================================================================================
 Package                  Arch                 Version                     Repository          Size
====================================================================================================
Installing:
 keepalived               x86_64               1.3.5-16.el7                base               331 k

Transaction Summary
====================================================================================================
Install  1 Package

Total download size: 331 k
Installed size: 1.0 M
Downloading packages:
keepalived-1.3.5-16.el7.x86_64.rpm                                           | 331 kB  00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : keepalived-1.3.5-16.el7.x86_64                                                   1/1
  Verifying  : keepalived-1.3.5-16.el7.x86_64                                                   1/1

Installed:
  keepalived.x86_64 0:1.3.5-16.el7

Complete!
[user00@centos7 ~]$ keepalived --version
Keepalived v1.3.5 (03/19,2017), git commit v1.3.5-6-g6fa32f2

Copyright(C) 2001-2017 Alexandre Cassen, <acassen@gmail.com>

Build options:  PIPE2 LIBNL3 RTA_ENCAP RTA_EXPIRES RTA_PREF FRA_OIFNAME FRA_SUPPRESS_PREFIXLEN FRA_TUN_ID RTAX_CC_ALGO RTAX_QUICKACK LIBIPTC LIBIPSET_DYNAMIC LVS LIBIPVS_NETLINK VRRP VRRP_AUTH VRRP_VMAC SOCK_NONBLOCK SOCK_CLOEXEC FIB_ROUTING INET6_ADDR_GEN_MODE SNMP_V3_FOR_V2 SNMP SNMP_KEEPALIVED SNMP_CHECKER SNMP_RFC SNMP_RFCV2 SNMP_RFCV3 SO_MARK
[user00@centos7 ~]$

[Centos側]F/W 設定

[user00@centos7 ~]$ sudo firewall-cmd --list-all
public (active)
  target: default
  icmp-block-inversion: no
  interfaces: eth0 wlan0
  sources:
  services: cockpit dhcp dhcpv6-client dns ftp http https ipsec l2tp ldap minecraft ntp postgresql samba smtp squid ssh syslog tftp
  ports: 25565/tcp
  protocols: ospf
  masquerade: yes
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:

[user00@centos7 ~]$ sudo firewall-cmd --add-protocol=vrrp
success
[user00@centos7 ~]$ sudo firewall-cmd --add-protocol=vrrp --permanent
success
[user00@centos7 ~]$ getenforce
Disabled
[user00@centos7 ~]$ sudo firewall-cmd --list-all
public (active)
  target: default
  icmp-block-inversion: no
  interfaces: eth0 wlan0
  sources:
  services: cockpit dhcp dhcpv6-client dns ftp http https ipsec l2tp ldap minecraft ntp postgresql samba smtp squid ssh syslog tftp
  ports: 25565/tcp
  protocols: ospf vrrp
  masquerade: yes
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:

[user00@centos7 ~]$

[Centos側]設定

[user00@centos7 ~]$ sudo cp -ap /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.org
[user00@centos7 ~]$ sudo vim /etc/keepalived/keepalived.conf
[sudo] password for user00:
[user00@centos7 ~]$ sudo systemctl status keepalived
● keepalived.service - LVS and VRRP High Availability Monitor
   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
   Active: inactive (dead)
[user00@centos7 ~]$ sudo systemctl enable keepalived
Created symlink from /etc/systemd/system/multi-user.target.wants/keepalived.service to /usr/lib/systemd/system/keepalived.service.
[user00@centos7 ~]$ sudo systemctl start keepalived
[user00@centos7 ~]$
/etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 10
    priority 100
    preempt
    preempt_delay 3
    delay 30
    fork_delay 30
    advert_int 3
    virtual_ipaddress {
        192.168.10.254/24
    }
    track_interface {
        eth0 weight 20
        wlan0 weight 15
    }
}

advert_int 3 を変えた場合 c841m 側のvrrp 10 timers advertise 3 を変えないと neighbor 認定されないので注意

[Cisco側]確認

C841M#show vrrp brief ?
  all  Include groups in disabled state
  |    Output modifiers
  <cr>

C841M#show vrrp brief
Interface          Grp Pri Time  Own Pre State   Master addr     Group addr
Vl10               10  100 9609       Y  Backup  192.168.10.251  192.168.10.254
C841M#
  1. Master のアドレスが centos7 側になっていること
  2. State が Backupになっていること

[Centos側]確認

[user00@centos7 ~]$ ip a show dev eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:00:00:12:34:56 brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.251/24 brd 192.168.30.255 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever
    inet 192.168.10.254/24 scope global secondary eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::250:10:168:192/128 scope link noprefixroute
       valid_lft forever preferred_lft forever
[user00@centos7 ~]$
  1. vrrp の grp ip アドレスが表示されること
  2. secondary eth0 が表示されていること
0
Help us understand the problem. What is going on with this article?
Why not register and get more from Qiita?
  1. We will deliver articles that match you
    By following users and tags, you can catch up information on technical fields that you are interested in as a whole
  2. you can read useful information later efficiently
    By "stocking" the articles you like, you can search right away
YuuT_38
4年目エンジニア 都内で主にCEやってますが偶に開発やSE(鯖周り)もします。 メインPCはwin10 ですがサブノートはkubuntu使ってます。UI良いよね。 公開されているソースコードは、特記がない限り MIT-LICENSE です。 PHP/HTML5/CSS/Javascript/python/Java/CentOS/Ubuntu/Kubuntu/Cicso

Comments

No comments
Sign up for free and join this conversation.
Sign Up
If you already have a Qiita account Login
0
Help us understand the problem. What is going on with this article?