3 Node Cluster

Overview

We have prepared 3 machines with RedHat 8 operating system in the same network:

• 10.1.1.2 vprotect1.local

• 10.1.1.3 vprotect2.local

• 10.1.1.4 vprotect3.local

We will use IP 10.1.1.5/23 for floating IP of our cluster.

1. vPlus server installation

Run that steps on all machines under pacemaker cluster:

1. Add vPlus repository

   vi /etc/yum.repos.d/vProtect.repo

   # vPlus - Enterprise backup solution for virtual environments repository
   [vprotect]
   name = vProtect
   baseurl = https://f002.backblazeb2.com/file/DPX-vPlus/current/el8
   gpgcheck = 0

2. Add MariaDB repository

   vi /etc/yum.repos.d/MariaDB.repo

   # MariaDB 10.10 RedHatEnterpriseLinux repository list - created 2023-08-23 08:49 UTC
   # https://mariadb.org/download/
   [mariadb]
   name = MariaDB
   # rpm.mariadb.org is a dynamic mirror if your preferred mirror goes offline. See https://mariadb.org/mirrorbits/ for details.
   # baseurl = https://rpm.mariadb.org/10.10/rhel/$releasever/$basearch
   baseurl = https://mirror.creoline.net/mariadb/yum/10.10/rhel/$releasever/$basearch
   # gpgkey = https://rpm.mariadb.org/RPM-GPG-KEY-MariaDB
   gpgkey = https://mirror.creoline.net/mariadb/yum/RPM-GPG-KEY-MariaDB
   gpgcheck = 1

3. Install vPlus server

   dnf install -y vprotect-server

4. Initialize vPlus server

   vprotect-server-configure

5. Redirect 8181 port to 443 on firewall

   /opt/vprotect/scripts/ssl_port_forwarding_firewall-cmd.sh

6. Add redirection to allow local node to communicate with server on cluster IP

   firewall-cmd --permanent --direct --add-rule ipv4 nat OUTPUT 0 -p tcp -o lo --dport 443 -j REDIRECT --to-ports 8181
   firewall-cmd --complete-reload

7. Open firewall for MariaDB replication:

   firewall-cmd --add-port=3306/tcp --permanent
   firewall-cmd --complete-reload

2. Configuration custom SSL certificate

All steps run as root user. All steps execute on first node of cluster.

Follow steps from enabling HTTPS connectivity for nodes.

3. vPlus node installation

Execute on all pacemaker nodes, and other vPlus node machines.

1. Add vPlus repository

   vi /etc/yum.repos.d/vProtect.repo

   # vPlus - Enterprise backup solution for virtual environments repository
   [vprotect]
   name = vProtect
   baseurl = https://f002.backblazeb2.com/file/DPX-vPlus/current/el8
   gpgcheck = 0

2. Install vPlus node

   dnf install -y vprotect-node

3. Initialize vPlus node

   vprotect-node-configure

4. Configure LVM filter.

5. Only when we want backup Proxmox by export strategy.

cd /opt/vprotect/scripts/vma
./setup_vma.sh vprotect-vma-20180128.tar

4. Backup destination configuration

For multi-node/cluster environment for backup destination we suggest to use NFS, Object Storage, Deduplication appliances. In this example we use NFS.

Execute on all vPlus node machines.

1. Add entry in /etc/fstab for automount NFS

   10.1.1.1:/vprotect /vprotect_data nfs defaults 0 0

2. Create directories for mount NFS share:

   mkdir /vprotect_data

3. Mount NFS share

   mount -a

4. Create subdirectories for backup destinations (run only on single node)

   mkdir /vprotect_data/backup
   mkdir /vprotect_data/backup/synthetic
   mkdir /vprotect_data/backup/filesystem
   mkdir /vprotect_data/backup/dbbackup

5. Add privileges for newly created shares

   chown vprotect:vprotect -R /vprotect_data

5. Cluster Configuration

Cluster is controlled by pacemaker.

5.1 Prepare operating system

All steps run as root user. Run that steps on all machines in pacemaker cluster:

1. Stop all services controlled by cluster, and disable autostart.

   systemctl stop vprotect-node
   systemctl stop vprotect-server
   systemctl disable vprotect-node
   systemctl disable vprotect-server

5.2 Set MariaDB replication

All steps run as root user. Run on all cluster nodes:

1. Create MariaDB user replication with password vPr0tect for replication:

   CREATE USER replicator@'10.1.1.%' IDENTIFIED BY 'vPr0tect';
   GRANT SELECT,REPLICATION SLAVE,REPLICATION CLIENT ON *.* to replicator@'10.1.1.%' IDENTIFIED BY 'vPr0tect';

2. Add changes to /etc/my.cnf.d/server.cnf in mysqld section:

   [mysqld]
   lower_case_table_names=1
   log-bin=mysql-bin
   relay-log=relay-bin
   log-slave-updates
   max_allowed_packet=500M
   log_bin_trust_function_creators=1

3. Add changes to /etc/my.cnf.d/server.cnf in mysqld section:

   On vprotect1.local:

   server-id=10

   On vprotect2.local:

   server-id=20

   On vprotect3.local:

   server-id=30

4. Restart MariaDB service:

   systemctl restart mariadb

5. On each host show output from command:

   SHOW MASTER STATUS;

   Output from vprotect3.local:

   +------------------+----------+--------------+------------------+
   | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
   +------------------+----------+--------------+------------------+
   | mysql-bin.000006 |      374 |              |                  |
   +------------------+----------+--------------+------------------+
   1 row in set (0.000 sec)

   Output from vprotect1.local:

   +------------------+----------+--------------+------------------+
   | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
   +------------------+----------+--------------+------------------+
   | mysql-bin.000007 |      358 |              |                  |
   +------------------+----------+--------------+------------------+
   1 row in set (0.000 sec)

   Output from vprotect2.local:

   +------------------+----------+--------------+------------------+
   | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
   +------------------+----------+--------------+------------------+
   | mysql-bin.000004 |      358 |              |                  |
   +------------------+----------+--------------+------------------+
   1 row in set (0.000 sec)

6. Set replication on each MariaDB server:

   Execute on vprotect1.local:

   CHANGE MASTER TO
   MASTER_HOST='10.1.1.4',
   MASTER_PORT=3306,
   MASTER_USER='replicator',
   MASTER_PASSWORD='vPr0tect',
   MASTER_LOG_FILE='mysql-bin.000006',
   MASTER_LOG_POS=37;

   Execute on vprotect2.local:

   CHANGE MASTER TO
   MASTER_HOST='10.1.1.2',
   MASTER_PORT=3306,
   MASTER_USER='replicator',
   MASTER_PASSWORD='vPr0tect',
   MASTER_LOG_FILE='mysql-bin.000007',
   MASTER_LOG_POS=358;

   Execute on vprotect3.local:

   CHANGE MASTER TO
   MASTER_HOST='10.1.1.3',
   MASTER_PORT=3306,
   MASTER_USER='replicator',
   MASTER_PASSWORD='vPr0tect',
   MASTER_LOG_FILE='mysql-bin.000004',
   MASTER_LOG_POS=358;

7. Start replication MariaDB: Execute on vprotect1.local:

   START SLAVE;

   Show output from command:

   SHOW SLAVE STATUS\G

   Wait until you see in output:

   Slave_IO_Running: Yes
   Slave_SQL_Running: Yes

   Repeat last step on host vprotect2.local and vprotect3.local.

5.2.1 Make same passwords for vprotect user in MariaDB

Note. Execute only on first node of cluster.

1. Copy password from file /opt/vprotect/payara.properties

   eu.storware.vprotect.db.password=SECRETPASSWORD

2. Log in to MariaDB

   mysql -u root -p

3. Set password for vprotect user:

   SET PASSWORD FOR 'vprotect'@'localhost' = PASSWORD('SECRETPASSWORD');
   quit;

4. Copy configuration files from vprotect1.local to other cluster hosts

   cd /opt/vprotect/
   keystore.jks
   log4j2-server.xml
   payara.properties
   vprotect.env
   vprotect-keystore.jks
   license.key

5. Add permissions for copied files

   chown vprotect:vprotect -R /opt/vprotect/

5.3 Configure pacemaker

All steps run as root user.

5.3.1 Run on every node in cluster

1. Install pacemaker packages

   dnf install -y pcs pacemaker fence-agents-all

2. Create SSH keys, and add them on other hosts to known.

3. Open ports on firewall

   firewall-cmd --permanent --add-service=high-availability
   firewall-cmd --reload

4. Start pcsd service

   systemctl start pcsd.service
   systemctl enable pcsd.service

5. Set same password for user hacluster

   passwd hacluster

5.3.2 Run only on first node of cluster

1. Authenticate nodes of cluster

   pcs host auth vprotect1.local vprotect2.local vprotect3.local

2. Create cluster

   pcs cluster setup vp vprotect1.local vprotect2.local vprotect3.local

3. Run cluster

   pcs cluster start --all

4. Power off stonith

   pcs property set stonith-enabled=false

5. Create floating IP in cluster

   pcs resource create vp-vip1 IPaddr2 ip=10.1.1.4 cidr_netmask=23 --group vpgrp

6. Add vprotect-server to cluster

   pcs resource create "vp-vprotect-server.service" systemd:vprotect-server.service op start on-fail="stop" timeout="300s" op stop timeout="300s" op monitor timeout="300s" --group vpgrp

7. Add vprotect-node to cluster

   pcs resource create "vp-vprotect-node.service" systemd:vprotect-node.service op start on-fail="stop" timeout="300s" op stop timeout="300s" op monitor timeout="300s" --group vpgrp

6. Register vPlus node on server (on all hosts)

1. Add certificate to trusted

   /opt/vprotect/scripts/node_add_ssl_cert.sh 10.1.1.5 443

2. Register node on server

   vprotect node -r ${HOSTNAME%%.*} admin https://10.1.1.5:443/api

7. Useful commands to control cluster:

For update, or service vPlus unmanaged services from cluster:

pcs resource unmanage vpgrp

Back to manage:

pcs resource manage vpgrp

Show status of cluster:

pcs status

Stop cluster node:

pcs cluster stop vprotect1.local

Stop all nodes of cluster:

pcs cluster stop --all

Start all nodes of cluster:

pcs cluster start --all

Clear old errors in cluster:

pcs resource cleanup