prerequisites

1. DPOD All-In-One appliance or non-appliance mode.

2. The system and app disks should support data redundancy (RAID in physical servers or central storage systems).

Backup

1. Perform backup periodically or snapshots of all the system and app disks as described in table 1 below .

2. In some cases, data disks cannot be backed up i.e. due Store data sizes. backup everything but the /data disks.

3. To restore, restore everything from the backup, make sure to have the same IP address, execute the required commands…

Restore

1. Restore all the system and app disks as described in table 1 below .

2. If applicable restore /data disk or follow the steps in “create new data disk” section.

Create New Data Disk

Non Appliance Mode

Please consult your system admin on how to add a new disk for /data mount point as described in Prepare Pre-Installed Operating System.
When done follow the steps in “Prepare /data for Application Use” section below.

Appliance Mode

1. Add a dedicated data disc to the system

   lsblk
   NAME                    MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
   sda                       8:0    0   40G  0 disk 
   ├─sda1                    8:1    0    2G  0 part /boot
   ├─sda2                    8:2    0 20.2G  0 part 
   │ ├─vg_root-lv_root     253:0    0    8G  0 lvm  /
   │ ├─vg_root-lv_tmp      253:2    0    4G  0 lvm  /tmp
   │ └─vg_root-lv_var      253:3    0    8G  0 lvm  /var
   └─sda3                    8:3    0    8G  0 part [SWAP]
   sdb                       8:16   0   40G  0 disk 
   ├─sdb1                    8:17   0 11.1G  0 part 
   │ └─vg_logs-lv_logs     253:5    0   11G  0 lvm  /logs
   ├─sdb2                    8:18   0 11.1G  0 part 
   │ └─vg_inst-lv_inst     253:7    0   11G  0 lvm  /installs
   ├─sdb3                    8:19   0  7.1G  0 part 
   │ └─vg_app-lv_app       253:6    0    7G  0 lvm  /app
   ├─sdb4                    8:20   0    1K  0 part 
   ├─sdb5                    8:21   0  4.1G  0 part 
   │ └─vg_apptmp-lv_apptmp 253:4    0    4G  0 lvm  /app/tmp
   └─sdb6                    8:22   0  600M  0 part 
     └─vg_shared-lv_shared 253:1    0  512M  0 lvm  /shared
   sdc                       8:32   0  100G  0 disk 
   sr0                      11:0    1 1024M  0 rom  

2. Find new disk using lsblk commnand. i.e:

3. Create logical volume

   pvcreate -ff /dev/sdc
   vgcreate vg_data /dev/sdc 
   lvcreate -l 100%FREE -n lv_data vg_data
   mkfs.xfs -f /dev/vg_data/lv_data 
   echo "/dev/vg_data/lv_data    /data                   xfs     defaults        0 0" >> /etc/fstab
   mount /data

4. Make sure data partition was created correctly with lsblk:

   lsblk
   NAME                    MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
   ...
   sdc                       8:32   0  100G  0 disk 
   └─vg_data-lv_data       253:8    0  100G  0 lvm  /data
   ...

Prepare /data for Application Use

1. Recreate directory structure by running the following commands:

   mkdir -m 755 -p /data/aggregatorAgents
   mkdir -m 755 -p /data/backups
   mkdir -m 755 -p /data/balancerAgents
   mkdir -m 755 -p /data/es-raw-trans
   mkdir -m 755 -p /data/keepalive
   mkdir -m 755 -p /data/Logical-Trans
   mkdir -m 755 -p /data/opensearch-dashboards
   mkdir -m 755 -p /data/reports
   mkdir -m 755 -p /data/reports/alerts-internal
   mkdir -m 755 -p /data/reports/reports-internal
   mkdir -m 755 -p /data/resources
   mkdir -m 755 -p /data/retention
   mkdir -m 755 -p /data/syslogAgents
   mkdir -m 755 -p /data/ui
   mkdir -m 755 -p /data/wsmAgents
   mkdir -m 755 -p /data/wsmAgents-internal-data
   chown /data/es-raw-trans --reference=/app/opensearch_nodes

2. Start store services using app-utils.sh

3. Recreate store security indices, run the following command and make sure it ends with the message Done with success.

   /app/opensearch_base/plugins/opensearch-security/tools/securityadmin.sh \
       -cd /app/opensearch_base/plugins/opensearch-security/securityconfig \
       -icl -nhnv -cacert /app/keys/store/dpod-es-ca-cert.pem \
       -cert /app/keys/store/dpod-es-admin-cert.pem -key /app/keys/store/dpod-es-admin-key.pem \
       -h montier-es --accept-red-cluster

4. start all services with app-utils.sh

Table 1 - File Systems / Mount Points