If you want to protect applications (such as databases) on a host, you need to add the host for DR protection. This operation instructs the administrators to add hosts to the DR management system on eReplication. The hosts provide necessary resources for DR.
Prerequisites
Before discovering hosts for Oracle 12c RAC or later, ensure that the Oracle RAC cluster service is running properly.
IP addresses of the hosts where protected objects reside and usernames and passwords configured during the eReplication Agent replication have been obtained.
- The scenarios of adding hosts are described in the following Table Parameters for adding hosts.
Table 1 The scenarios of adding hosts Protected Object
Description
- Oracle
- IBM DB2
- Microsoft SQL Server
- SAP HANA
Add the hosts where databases reside.
Context
If you uninstall and reinstall the eReplication Agent on a host, you need to add the host again after the eReplication Agent is reinstalled.
Procedure
- On the menu bar, select Resources.
- On the navigation bar, select the site where the hosts are to be added.
- Add hosts.
Hosts that need to be managed must be added.
- Select Add Host.
- Method 1: In the Resource Statistics, click Add Host.
- Method 2: In the navigation tree, select Host. Then click Add Host.
- Method 1: In the Resource Statistics, click Add Host.
- Optional: Select Apply the port, username, and password of the first row to the newly added row. The system will use the port, username, and password of the host in the first row to avoid repeated inputs.
- Optional: Select Enable Agentless. If Enable Agentless is not selected, an Agent host is created.
- Agentless hosts do not support host log collection.
- Agentless hosts do not support customized scripts for protection and restoration.
- In the step of customizing scripts in the protection and recovery processes, hosts with Agentless enabled do not support third-party scripts.
- Set parameters for hosts to be added as described in Table 2.
- If only one host needs to be added, enter the authentication information of the host in the default row.
- If multiple hosts need to be added, you can click Add to add authentication information of multiple hosts.
Table 2 Parameters for adding hosts Parameter
Description
Value
IP Address
IP address of the host.
[Value range]
- The value of the leftmost field ranges from 1 to 223 (excluding 127).
- The value of the last field ranges from 1 to 255.
- The values of the other fields range from 0 to 255.
[Example]
192.168.10.11
Port
Communication port of the eReplication Server and Agent.
[Value range]
The value ranges from 1 to 65535. The default value is 59526. The default value is provided in the default row only. You can copy the information in the default row.
Username
Username configured during the eReplication Agent installation.
When Agentless is enabled, the default username is BCManager..
Password
Password configured during the eReplication Agent installation.
Obtain the Agentless password from the host administrator.
If an added host does not need to be discovered, click Delete to delete it. The default information row cannot be deleted.
- Click OK.
- Select Add Host.
- Optional: If the application environment is a cluster, you need to create a host group and add all the hosts in the cluster to the host group.
- Click Create Host Group. Table Parameters for creating host groups describes related parameters.
Table 3 Parameters for creating host groups Parameter
Description
Value
Name
Name of the host group.
[Value range]
- Contains 4 to 32 characters.
- Contains letters, digits, underscores (_), and hyphens (-), and cannot start with a hyphen (-).
[Example]
hostgroup
Operating System
iSoft
Host groups support Windows, RedHat, HP-UX, SUSE, AIX, Solaris, Oracle Linux, and iSoft.
[Example]
Windows
Cluster Type
You need to select a cluster type from the drop-down list. Host groups running different operating systems support different cluster types.
- If the operating system of a host group is Windows, the cluster type can only be Oracle RAC or WSFC.
- If the operating system of a host group is Red Hat, the cluster type can only be Oracle RAC, VCS, or RHCS.
- If the operating system of a host group is HP-UX, the cluster type can only be Oracle RAC or ServiceGuard.
- If the operating system of a host group is SUSE, the cluster type can only be Oracle RAC.
- If the operating system of a host group is AIX, the cluster type can only be Oracle RAC or PowerHA.
- If the operating system of a host group is Solaris, the cluster type can only be Oracle RAC or Sun Cluster.
- If the operating system of a host group is Oracle Linux, the cluster type can only be Oracle RAC.
If the operating system of a host group is iSoft, the cluster type can only be Oracle RAC.
[Example]
Oracle RAC
- In the Host area, select one or more hosts.
- Click OK.
- Click Create Host Group. Table Parameters for creating host groups describes related parameters.
Related Operations
After hosts are added, you can refresh, modify, and delete host information. For details about subsequent operations, see Table Related operations.
Operation Name |
Related Operation |
Prerequisite and Result |
|---|---|---|
Modify information about a host or host group |
Select the host or host group that you want to modify and click More > Modify on the Operation list. Modify the host or host group name and the authentication information or alarm reporting information of the host. Then click OK. |
If you change the authentication or alarm reporting information of a host, synchronize the latest information toeReplication in time to ensure successful running of subsequent DR protection services. |
Add a host to a host group |
If you want to add a host to the host group, click More > Add to Host Group on the Operation list. And then click OK. |
If the application environment is a cluster, you need to add all the hosts in the cluster to the host group. |
Remove a host from a host group |
If you want to remove a host from the host group, click More > Remove from Host Group on the Operation list. And then click OK. The host is removed from the host group, but still exists at the site. |
If a host in the cluster is adjusted or does not belong to the cluster again, you need to remove the host from the original host group. |
Delete a host that is no longer used |
If you want to delete a host that has not been added to a host group, click More > Delete on the Operation list. The host is deleted from the site. |
Perform this operation when a host is no longer needed. |
Delete unnecessary host groups |
If you want to delete a host group, select the host group, click More > Delete on the Operation list. And click OK. |
Perform this operation when a host group is no longer needed. |
Export logs |
In the row of the host whose eReplication Agent logs need to be exported, click More > Collect Log on the Operation list. And then click OK. View the background task to check whether the logs are collected successfully. In the row of the host whose logs have been collected, click More > Export Log on the Operation list. Export logs to a local path. |
If anomalies occur on a protected object (such as a database) during DR protection or recovery, you can export the logs of the eReplication Agent on the host where the protected object resides to a local path. You can analyze the logs to locate and handle the anomalies. |
Refresh hosts |
|
eReplication automatically queries information about added hosts every 12 hours to ensure the host information in eReplication is consistent with the actual host information. If the host information is changed, you need to refresh the information in eReplication immediately. If the application environment is a cluster and information about hosts in the host group is changed, you can refresh the host group to refresh information about all the hosts in the host group. |