SFTP (CrushFTP)with HA

concept

Services to be used

• Keepalived

• CrushFTP

• crontab

CrushFTP

Install CrushFTP using this tutorial

Setup HA using Keepalived

HA with Keepalived concept

                           /---> SF1 [active]
                          /      |
                         /       |
Service request ----> Virtual IP     (VRRP)
                         .       |
                          .      |
                           . . > SF2 [passive]

Lets configure HA

Hostname	IP	Role
SF1	192.168.4.231	Master
SF2	192.168.4.232	Slave
VIP	192.168.4.235	VIP

type ip a in terminal to find IP address of you hosts, install below mentioned packages in your servers.

sudo yum update
sudo yum install keepalived
sudo yum install libipset13

edit your config, I am using nano as editor because I am using Ubuntu.

sudo nano /etc/keepalived/keepalived.conf

First node

/etc/keepalived/keepalived.conf

vrrp_instance VI_1 {
  state MASTER
  interface 
  virtual_router_id 55
  priority 150
  advert_int 1
  unicast_src_ip 192.168.4.231
  unicast_peer {
    192.168.4.232
  }

  authentication {
    auth_type PASS
    auth_pass 
  }

  virtual_ipaddress {
    192.168.4.235/24
  }
}

Second node

/etc/keepalived/keepalived.conf

vrrp_instance VI_1 {
  state BACKUP
  interface 
  virtual_router_id 55
  priority 100
  advert_int 1
  unicast_src_ip 192.168.4.232
  unicast_peer {
    192.168.4.231
  }

  authentication {
    auth_type PASS
    auth_pass 
  }

  virtual_ipaddress {
    192.168.4.235/24
  }
}

Start and enable the service

sudo systemctl enable --now keepalived.service

Stopping the service

sudo systemctl stop keepalived.service

Starting the service

sudo systemctl start keepalived.service

get the status

sudo systemctl status keepalived.service