Virtual Private Cloud:HAVIP tutorial

Step 1: Create an HAVIP

1. Log on to the VPC console.

2. In the left-side navigation pane, click HaVip.

3. In the top navigation bar, select the region where you want to create the HAVIP.

4. On the HaVip page, click Create HaVip.

5. In the Create HaVip dialog box, set the following parameters and click OK.

   • Region: displays the region where you want to create the HAVIP.

   • VPC: specifies the VPC to which the HAVIP belongs.

   • vSwitch: specifies the vSwitch to which the HAVIP belongs.

   • vSwitch CIDR Block: displays the CIDR block of the vSwitch.

   • Whether to automatically assign private IP addresses: Select whether to automatically assign a private IP address.

     • Yes: The system automatically allocates an idle private IP address from the vSwitch CIDR block.

     • No: You must manually enter an idle private IP address from the vSwitch CIDR block.

Step 2: Install Keepalived on the primary and secondary ECS instances

In this example, the ECS instances use the CentOS.

1. Log on to ECS 1. For more information, see Connection methods.

2. Run the following command to install keepalived:

   yum install keepalived

3. Modify the keepalived.conf file.

   1. Run the following command to modify the keepalived.conf file:

      vim /etc/keepalived/keepalived.conf

   2. Run the following command to enter the input mode:

      i

   3. Modify the keepalived.conf file based on the following instructions:

      ! Configuration File for keepalived
      vrrp_instance VI_1 {
      state MASTER           #Specify ECS 1 as the primary ECS instance.
          interface eth0          #Specify the name of the ENI. eth0 is used in this example.  
          virtual_router_id 51
          nopreempt              
          priority 100             #Specify a priority for the ECS instance. A larger value indicates a higher priority. A priority of 100 is specified for the ECS instance in this example.
          advert_int 1        
          authentication {
              auth_type PASS
              auth_pass 1111
          }
          unicast_src_ip 192.168.0.209   #Specify the private IP address of the ECS instance. 192.168.0.209 is used in this example.
          unicast_peer {
              192.168.0.210           #Specify the private IP address of the peer ECS instance. 192.168.0.210 is used in this example.
          }
          virtual_ipaddress {
              192.168.0.88          #Specify the IP address of the HAVIP. 192.168.0.88 is used in this example. 
          }   
          garp_master_delay 1
          garp_master_refresh 5
      
          track_interface {
              eth0                #Specify the name of the ENI of the ECS instance. eth0 is used in this example.
          }
      }

   4. Press the Esc key to exit the edit mode. Enter :wq and press the Enter key to save and close the configuration file.

4. Run the following command to start keepalived on ECS 1:

   systemctl start keepalived

5. Log on to ECS 2.

6. Run the following command to install keepalived:

   yum install keepalived

7. Modify the keepalived.conf file.

   1. Run the following command to modify the keepalived.conf file:

      vim /etc/keepalived/keepalived.conf

   2. Run the following command to enter the input mode:

      i

   3. Modify the keepalived.conf file based on the following instructions:

      ! Configuration File for keepalived
      vrrp_instance VI_1 {
      state BACKUP           #Specify ECS 2 as the secondary ECS instance.
          interface eth0          #Specify the name of the ENI. eth0 is used in this example.  
          virtual_router_id 51
          nopreempt              
          priority 10             #Specify a priority for the secondary ECS instance. A larger value indicates a higher priority. A priority of 10 is specified for the ECS instance in this example.
          advert_int 1        
          authentication {
              auth_type PASS
              auth_pass 1111
          }
          unicast_src_ip 192.168.0.210   #Specify the private IP address of the ECS instance. 192.168.0.210 is used in this example.
          unicast_peer {
              192.168.0.209           #Specify the private IP address of the peer ECS instance. 192.168.0.209 is used in this example.
          }
          virtual_ipaddress {
              192.168.0.88          #Specify the IP address of the HAVIP. 192.168.0.88 is used in this example. 
          }    
          garp_master_delay 1
          garp_master_refresh 5
      
          track_interface {
              eth0                #Specify the name of the ENI of the ECS instance. eth0 is used in this example.
          }
      }

   4. Press the Esc key to exit the edit mode. Enter :wq and press the Enter key to save and close the configuration file.

8. Run the following command to start keepalived on ECS 2:

   systemctl start keepalived

Step 3: Associate the HAVIP with the primary and secondary ECS instances

Perform the following steps to associate the HAVIP with both the primary and secondary ECS instances:

1. Log on to the VPC console.

2. In the left-side navigation pane, click HaVip.

3. In the top navigation bar, select the region where the HAVIP is created.

4. Find the HAVIP created in Step 1: Create an HAVIP and click its ID.

5. Click Bind next to ECS Instances in the Resources section.

   

6. In the dialog box that appears, select ECS 1 and click OK.

7. Repeat the preceding steps to associate the HAVIP with ECS 2.

Step 4: Associate the HAVIP with an EIP

You can associate the HAVIP with an EIP. Then, the HAVIP can use the EIP to provide services over the Internet.

1. Log on to the VPC console.

2. In the left-side navigation pane, click HaVip.

3. In the top navigation bar, select the region where the HAVIP is created.

4. Find the HAVIP created in Step 1: Create an HAVIP and click its ID.

5. Click Bind next to Elastic IP Address in the Resources section.

   

6. In the dialog box that appears, select the EIP and click OK.