LKCLI – Replicate the Existing Cluster Settings

Inherit and Duplicate the Cluster Settings

This section describes the procedure for replicating a cluster with the same settings based on the cluster with the communication path and resource set.
 

Configuration

The steps describe preparing a 2-node LifeKeeper cluster and another LifeKeeper cluster to be replicated. The other cluster is not configured with communication paths and resources.

Caution

The following are resource and communication path restrictions for the resource and communication path output when using the export command. Before performing the steps, check to see if the environment is supported.

• Make sure the communication path protocol that can be exported is TCP/IP.

# lkcli status -q
LOCAL    TAG            ID             STATE     PRIO  PRIMARY
target1  ip-10.1.6.100  ip-10.1.6.100  ISP          1  target1
 
MACHINE  NETWORK ADDRESSES/DEVICE     STATE     PRIO
target2    TCP   10.1.6.88/10.1.6.89  ALIVE        1

• Make sure all resources in the cluster to be exported are supported ARKs with LKCLI. Refer to LKCLI Subcommands for Each ARK for a list of supported ARKs and resource types.

# lkcli resource info --tag ip-10.1.6.100
---
app: comm
priority: 1
properties:
  device: ens192
  ipaddr: 10.1.6.100
  netmask: 255.255.255.0
  pinglist: ''
  realip: 0
  restoremode: Disabled
  srcaddr: 0
switchback: INTELLIGENT
tag: ip-10.1.6.100
typ: ip

Steps

Execute the command on target1

1. Save the current settings to the file in the cluster where LifeKeeper is configured.

[target1]# lkcli export > src_settings.yml

2. Copy the exported file to the cluster to be replicated.

Execute the command on target3.

3. For the exported configuration file, edit only the IP address and hostname manually.

[target3]# sed -e "s/10\.1\.6\.88/10\.1\.6\.90/" -e "s/target1/target3/" -e "s/10\.1\.6\.89/10\.1\.6\.91/" -e "s/target2/target4/" src_settings.yml > dest_settings.yml

4. Make sure there are no communication path or resources in the cluster to be replicated (check all nodes in the cluster).
   
   If any exist, run the following command to delete: lkcli clean --mode all. Note that the setting won’t be restored after executing the clean command.

[target3]# lkcli status -q
LOCAL    TAG   ID    STATE     PRIO  PRIMARY

Execute the command on target3 and target4

5. Import the resources in the replicated system and check that the communication path can be created. Execute this command on all of the nodes in the cluster.

# lkcli import commpath --file dest_settings.yml
Performing commpath 'target3:10.1.6.90/10.1.6.91' create...
Commpath 'target3:10.1.6.90/10.1.6.91' created successful.

# lkcli status -q
LOCAL    TAG   ID    STATE     PRIO  PRIMARY
 
MACHINE  NETWORK ADDRESSES/DEVICE     STATE     PRIO
target4    TCP   10.1.6.90/10.1.6.91  ALIVE        1

*The communication path status will be ALIVE when it is created in both directions between 2 nodes.

6. Import the resources in the replicated system and check that the resource can be created. Execute this command only once in the cluster.

# lkcli import resource --file dest_settngs.yml
BEGIN create of "ip-10.1.6.100"
LifeKeeper application=comm on target1.
LifeKeeper communications resource type= ip on target1.
Creating resource instance with id ip-10.1.6.100 on machine target1
Resource successfully created on target1
BEGIN restore of "ip-10.1.6.100"
END successful restore of "ip-10.1.6.100"
END successful create of "ip-10.1.6.100".
Removing ping list for subnet 172.31.0.0...
Performing restoremode change ...
 
restoremode change successful.
Building independent resource list
Checking existence of extend and canextend scripts
Checking extendability for ip-10.1.6.100
Pre Extend checks were successful
Extending resource instances for ip-10.1.6.100
Creating dependencies
Setting switchback type for hierarchy
Creating equivalencies
LifeKeeper Admin Lock (ip-10.1.6.100) Released
Hierarchy successfully extended
Removing ping list for subnet 172.31.0.0...

7. The communication path and resource are created.

# lkcli status -q
LOCAL    TAG              ID           STATE     PRIO  PRIMARY
target3  ip-10.1.6.100  ip-10.1.6.100  ISP          1  target3
 
MACHINE  NETWORK ADDRESSES/DEVICE     STATE     PRIO
target4  TCP     10.1.6.90/10.1.6.91  ALIVE        1