PowerFlex How To Change/Remove Data IP from Primary MDM in Single-node Cluster

Summary: User wanted to remove data IP of obsolete network from Cluster Use in Single node Cluster.

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Instructions

When using one management network (mgmt. IP) and two Data Networks (data1, data2 IPs) While in single-node mode, data2 Network became faulty and could not switch mode to 3-node Cluster as a result.
To go around this, we remove all data2 IPs from the system.

mgmt. IP: 10.66.0.x
data1 IP: 100.100.0.x
data2 IP: 200.200.0.x (network to be removed)

Primary_mdm_name: MDM2 (10.66.0.102, 100.100.0.102)
Standby_mdm_name: MDM1 (10.66.0.101, 100.100.0.101)
Standby_mdm_name: TB1 (100.100.0.200)

Steps:
1- Remove data2 IP from all SDSs using ScaleIO GUI or using CLI command:

scli --remove_sds_ip (--sds_id  | --sds_name  | --sds_ip  [--sds_port ]) --sds_ip_to_remove

2-remove all Standby Nodes. Scli --remove_standby_mdm --remove_mdm_name ie.

scli --remove_standby_mdm --remove_mdm_name MDM1
scli --remove_standby_mdm --remove_mdm_name TB1

3- Re-add Standby nodes without data2 IP

scli --add_standby_mdm --mdm_role  --new_mdm_ip  [--new_mdm_management_ip ] --new_mdm_name  --allow_asymmetric_ips --force_clean
--allow_asymmetric_ips -> Allow the added node to have a different number of IPs from the primary node
--force_clean -> Clean previous configuration of the MDM
ie.
scli --add_standby_mdm --mdm_role manager --new_mdm_ip 100.100.0.101 --new_mdm_management_ip 10.66.0.101 --new_mdm_name MDM1 --allow_asymmetric_ips --force_clean

scli --add_standby_mdm --mdm_role tb --new_mdm_ip 100.100.0.200 --new_mdm_name TB1 --allow_asymmetric_ips --force_clean

4- Switch cluster mode from single-node to 3-node cluster

scli --switch_cluster_mode --cluster_mode  --add_slave_mdm_name  --add_tb_name 
ie.
scli --switch_cluster_mode --cluster_mode 3-node --add_slave_mdm_name MDM1 --add_tb_name TB1

5- Switch Ownership of Primary MDM to the newly added mdm node

scli --switch_mdm_ownership --new_master_mdm_name 
ie.
scli --switch_mdm_ownership --new_master_mdm_name MDM1

6- Switch Cluster to a single-node.

scli --switch_cluster_mode --cluster_mode  --remove_slave_mdm_name  --remove_tb_name 
ie.
scli --switch_cluster_mode --cluster_mode 1_node --remove_slave_mdm_name MDM2 --remove_tb_name TB1

7- Remove Standby mdm Node containing the data2 IP.

scli --remove_standby_mdm --remove_mdm_name 
ie.
scli --remove_standby_mdm --remove_mdm_name MDM2

8- Re-add Standby mdm Node without data2 IP

scli --add_standby_mdm --mdm_role  --new_mdm_ip  [--new_mdm_management_ip ] --new_mdm_name  --allow_asymmetric_ips --force_clean
--allow_asymmetric_ips -> Allow the added node to have a different number of IPs from the primary node
--force_clean -> Clean previous configuration of the MDM
ie.
scli --add_standby_mdm --mdm_role manager --new_mdm_ip 100.100.0.102 --new_mdm_management_ip 10.66.0.102 --new_mdm_name MDM2 --allow_asymmetric_ips --force_clean

9- Switch Cluster to 3-nodes.

scli --switch_cluster_mode --cluster_mode  --add_slave_mdm_name  --add_tb_name 
ie.
scli --switch_cluster_mode --cluster_mode 3_node --add_slave_mdm_name MDM2 --add_tb_name TB1

10- (Optional) Switch ownership of Primary MDM back to original Node

scli --switch_mdm_ownership --new_master_mdm_name MDM2

 

Additional Information

Notes:
- The same steps work if switching from single-node to 5-node.
- This Method Has been Tested with no Virtual IPs Configured for the Cluster.
- If Virtual IPs are configured, then all virtual IPs must be removed first

Affected Products

PowerFlex rack, VxFlex Product Family
Article Properties
Article Number: 000009841
Article Type: How To
Last Modified: 27 Feb 2025
Version:  6
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