Wazuh central components

Preparing the upgrade

In the case Wazuh is installed in a multi-node cluster configuration, repeat the following steps for every node.

1. Add the Wazuh repository. You can skip this step if the repository is already present and enabled on the node.

   YumAPT

   1. Import the GPG key.

      # rpm --import https://packages.wazuh.com/key/GPG-KEY-WAZUH
      

   2. Add the repository.

      # echo -e '[wazuh]\ngpgcheck=1\ngpgkey=https://packages.wazuh.com/key/GPG-KEY-WAZUH\nenabled=1\nname=EL-$releasever - Wazuh\nbaseurl=https://packages.wazuh.com/4.x/yum/\nprotect=1' | tee /etc/yum.repos.d/wazuh.repo
      

2. Stop the Filebeat service and the Wazuh dashboard service if installed in the node.

   SystemdSysV init

   # systemctl stop filebeat
   # systemctl stop wazuh-dashboard
   

Upgrading the Wazuh indexer

In the case of having a Wazuh indexer cluster with multiple nodes, the cluster will remain available throughout the upgrading process. This rolling upgrade allows shutting down one Wazuh indexer node at a time for minimal disruption of service. Repeat these steps for every Wazuh indexer node.

1. Disable shard allocation.

   curl -X PUT "https://<WAZUH_INDEXER_IP_ADDRESS>:9200/_cluster/settings"  -u <USERNAME>:<PASSWORD> -k -H 'Content-Type: application/json' -d'
   {
     "persistent": {
       "cluster.routing.allocation.enable": "primaries"
     }
   }
   '
   

2. Stop non-essential indexing and perform a synced flush.

   # curl -X POST "https://<WAZUH_INDEXER_IP_ADDRESS>:9200/_flush/synced" -u <USERNAME>:<PASSWORD> -k
   

3. Shut down the Wazuh indexer in the node.

   SystemdSysV init

   # systemctl stop wazuh-indexer
   

4. Upgrade the Wazuh indexer to the latest version.

   YumAPT

   # yum upgrade wazuh-indexer-4.7.5-1
   

5. Restart the service.

   SystemdSysV init

   # systemctl daemon-reload
   # systemctl enable wazuh-indexer
   # systemctl start wazuh-indexer
   

6. Check that the newly-upgraded node joins the cluster.

   # curl -k -u <USERNAME>:<PASSWORD> https://<WAZUH_INDEXER_IP_ADDRESS>:9200/_cat/nodes?v
   

7. Re-enable shard allocation.

   curl -X PUT "https://<WAZUH_INDEXER_IP_ADDRESS>:9200/_cluster/settings" -u <USERNAME>:<PASSWORD> -k -H 'Content-Type: application/json' -d'
   {
     "persistent": {
       "cluster.routing.allocation.enable": "all"
     }
   }
   '
   

8. Check again the status of the cluster to see if shard allocation has finished.

   # curl -k -u <USERNAME>:<PASSWORD> https://<WAZUH_INDEXER_IP_ADDRESS>:9200/_cat/nodes?v
   

Upgrading the Wazuh server

When upgrading a multi-node Wazuh manager cluster, run the upgrade in every node to make all the Wazuh manager nodes join the cluster. Start with the master node to reduce server downtime.

Note

Upgrading from Wazuh 4.2.x or lower creates the wazuh operating system user and group to replace ossec. To avoid upgrade conflicts, make sure that the wazuh user and group are not present in your operating system.

1. Upgrade the Wazuh manager to the latest version.

   YumAPT

   # yum upgrade wazuh-manager-4.7.5-1
   

   Note

   If the /var/ossec/etc/ossec.conf configuration file was modified, it will not be replaced by the upgrade. You will therefore have to add the settings of the new capabilities manually. More information can be found in User manual.

2. Download the Wazuh module for Filebeat:

   # curl -s https://packages.wazuh.com/4.x/filebeat/wazuh-filebeat-0.3.tar.gz | sudo tar -xvz -C /usr/share/filebeat/module
   

3. Download the alerts template:

   # curl -so /etc/filebeat/wazuh-template.json https://raw.githubusercontent.com/wazuh/wazuh/v4.7.5/extensions/elasticsearch/7.x/wazuh-template.json
   # chmod go+r /etc/filebeat/wazuh-template.json
   

4. Restart Filebeat:

   SystemdSysV init

   # systemctl daemon-reload
   # systemctl enable filebeat
   # systemctl start filebeat
   

5. Upload the new Wazuh template. This step can be omitted for Wazuh indexer single-node installations.

   # filebeat setup --index-management -E output.logstash.enabled=false
   

Upgrading the Wazuh dashboard

1. Upgrade the Wazuh dashboard.

   YumAPT

   # yum upgrade wazuh-dashboard-4.7.5-1
   

2. Restart the Wazuh dashboard:

   SystemdSysV init

   # systemctl daemon-reload
   # systemctl enable wazuh-dashboard
   # systemctl start wazuh-dashboard
   

Next steps

The Wazuh server, indexer, and dashboard are now successfully upgraded. The next step consists in upgrading the Wazuh agents. Follow the instructions in:

• Upgrading the Wazuh agent.