Installing the Wazuh indexer step by step

Generating the SSL certificates

1. Download the wazuh-certs-tool.sh script and the config.yml configuration file. This creates the certificates that encrypt communications between the Wazuh central components.

   # curl -sO https://packages.wazuh.com/4.13/wazuh-certs-tool.sh
   # curl -sO https://packages.wazuh.com/4.13/config.yml
   

2. Edit ./config.yml and replace the node names and IP values with the corresponding names and IP addresses. You need to do this for all Wazuh server, Wazuh indexer, and Wazuh dashboard nodes. Add as many node fields as needed.

   nodes:
     # Wazuh indexer nodes
     indexer:
       - name: node-1
         ip: "<indexer-node-ip>"
       #- name: node-2
       #  ip: "<indexer-node-ip>"
       #- name: node-3
       #  ip: "<indexer-node-ip>"
   
     # Wazuh server nodes
     # If there is more than one Wazuh server
     # node, each one must have a node_type
     server:
       - name: wazuh-1
         ip: "<wazuh-manager-ip>"
       #  node_type: master
       #- name: wazuh-2
       #  ip: "<wazuh-manager-ip>"
       #  node_type: worker
       #- name: wazuh-3
       #  ip: "<wazuh-manager-ip>"
       #  node_type: worker
   
     # Wazuh dashboard nodes
     dashboard:
       - name: dashboard
         ip: "<dashboard-node-ip>"
   

   To learn more about how to create and configure the certificates, see the Certificates deployment section.

3. Run ./wazuh-certs-tool.sh to create the certificates. For a multi-node cluster, these certificates need to be later deployed to all Wazuh instances in your cluster.

   # bash ./wazuh-certs-tool.sh -A
   

4. Compress all the necessary files.

   # tar -cvf ./wazuh-certificates.tar -C ./wazuh-certificates/ .
   # rm -rf ./wazuh-certificates
   

5. Copy the wazuh-certificates.tar file to all the nodes, including the Wazuh indexer, Wazuh server, and Wazuh dashboard nodes. This can be done by using the scp utility.

Installing package dependencies

1. Run the following command to install the following packages if missing:

   APTYumDNF

   # apt-get install debconf adduser procps
   

Adding the Wazuh repository

Installing the Wazuh indexer

1. Install the Wazuh indexer package.

   APTYumDNF

   # apt-get -y install wazuh-indexer
   

Configuring the Wazuh indexer

1. Edit /etc/wazuh-indexer/opensearch.yml and replace the following values:

   1. network.host: Sets the address of this node for both HTTP and transport traffic. The node will bind to this address and use it as its publish address. Accepts an IP address or a hostname.

      Use the same node address set in config.yml to create the SSL certificates.

   2. node.name: Name of the Wazuh indexer node as defined in the config.yml file. For example, node-1.

   3. cluster.initial_master_nodes: List of the names of the master-eligible nodes. These names are defined in the config.yml file. Uncomment the node-2 and node-3 lines, change the names, or add more lines, according to your config.yml definitions.

      cluster.initial_master_nodes:
      - "node-1"
      - "node-2"
      - "node-3"
      

   4. discovery.seed_hosts: List of the addresses of the master-eligible nodes. Each element can be either an IP address or a hostname. You may leave this setting commented if you are configuring the Wazuh indexer as a single node. For multi-node configurations, uncomment this setting and set the IP addresses of each master-eligible node.

      discovery.seed_hosts:
        - "10.0.0.1"
        - "10.0.0.2"
        - "10.0.0.3"
      

   5. plugins.security.nodes_dn: List of the Distinguished Names of the certificates of all the Wazuh indexer cluster nodes. Uncomment the lines for node-2 and node-3 and change the common names (CN) and values according to your settings and your config.yml definitions.

      plugins.security.nodes_dn:
      - "CN=node-1,OU=Wazuh,O=Wazuh,L=California,C=US"
      - "CN=node-2,OU=Wazuh,O=Wazuh,L=California,C=US"
      - "CN=node-3,OU=Wazuh,O=Wazuh,L=California,C=US"
      

Deploying certificates

1. Run the following commands, replacing <INDEXER_NODE_NAME> with the name of the Wazuh indexer node you are configuring as defined in config.yml. For example, node-1. This deploys the SSL certificates to encrypt communications between the Wazuh central components.

   # NODE_NAME=<INDEXER_NODE_NAME>
   

   # mkdir /etc/wazuh-indexer/certs
   # tar -xf ./wazuh-certificates.tar -C /etc/wazuh-indexer/certs/ ./$NODE_NAME.pem ./$NODE_NAME-key.pem ./admin.pem ./admin-key.pem ./root-ca.pem
   # mv -n /etc/wazuh-indexer/certs/$NODE_NAME.pem /etc/wazuh-indexer/certs/indexer.pem
   # mv -n /etc/wazuh-indexer/certs/$NODE_NAME-key.pem /etc/wazuh-indexer/certs/indexer-key.pem
   # chmod 500 /etc/wazuh-indexer/certs
   # chmod 400 /etc/wazuh-indexer/certs/*
   # chown -R wazuh-indexer:wazuh-indexer /etc/wazuh-indexer/certs
   

2. Recommended action: If no other Wazuh components will be installed on this node, run the following command to remove the wazuh-certificates.tar file.

   # rm -f ./wazuh-certificates.tar
   

Starting the service

1. Enable and start the Wazuh indexer service.

   SystemdSysV init

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

Repeat this stage of the installation process for every Wazuh indexer node in your multi-node cluster. Then proceed with initializing your single-node or multi-node cluster in the next stage.

Testing the cluster installation

1. Run the following commands to confirm that the installation is successful. Replace <WAZUH_INDEXER_IP_ADDRESS> with the IP address of the Wazuh indexer and enter admin as the password when prompted:

   # curl -k -u admin https://<WAZUH_INDEXER_IP_ADDRESS>:9200
   

   {
     "name" : "node-1",
     "cluster_name" : "wazuh-cluster",
     "cluster_uuid" : "095jEW-oRJSFKLz5wmo5PA",
     "version" : {
       "number" : "7.10.2",
       "build_type" : "rpm",
       "build_hash" : "db90a415ff2fd428b4f7b3f800a51dc229287cb4",
       "build_date" : "2023-06-03T06:24:25.112415503Z",
       "build_snapshot" : false,
       "lucene_version" : "9.6.0",
       "minimum_wire_compatibility_version" : "7.10.0",
       "minimum_index_compatibility_version" : "7.0.0"
     },
     "tagline" : "The OpenSearch Project: https://opensearch.org/"
   }
   

2. Run the following command to check if the cluster is working correctly. Replace <WAZUH_INDEXER_IP_ADDRESS> with the IP address of the Wazuh indexer and enter admin as the password when prompted:

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

   The command produces output similar to the following:

   ip              heap.percent ram.percent cpu load_1m load_5m load_15m node.role node.roles                               cluster_manager name
   192.168.107.240           19          94   4    0.22    0.21     0.20 dimr      data,ingest,master,remote_cluster_client *               node-1