Configure the on-premises cloud provider

• AWS
• GCP
• Azure
• Kubernetes
• VMware Tanzu
• OpenShift
• On-premises

You can configure the on-premises cloud provider for YugabyteDB using YugabyteDB Anywhere. If no cloud providers are configured, the main Dashboard prompts you to configure at least one cloud provider.

Configure the on-premises provider

Configuring the on-premises provider consists of a number of steps.

Complete the provider information

You need to navigate to Configs > Infrastructure > On-Premises Datacenters, click either Add Configuration or Edit Provider, and then complete the fields of the Provider Info form shown in the following illustration:

• In the Provider Name field, supply the provider name, which is an internal tag that helps with organizing your providers, so you know where you want to deploy your YugabyteDB universes.

• In the SSH User field, enter the name of the user that has SSH privileges on your instances. This is required because to provision on-premises nodes with YugabyteDB, YugabyteDB Anywhere needs SSH access to these nodes. Unless you plan to provision the database nodes manually, the user needs to have password-free sudo permissions to complete a few tasks.

  If the SSH user requires a password for sudo access or the SSH user does not have sudo access, follow the steps described in Manually provision nodes.

• In the SSH Port field, provide the port number of SSH client connections.

• Enable the Manually Provision Nodes field if you choose to manually set up your database nodes. Otherwise, YugabyteDB Anywhere will use the sudo user to set up YugabyteDB nodes. For manual provisioning, you would be prompted to run a Python script at a later stage or to run a set of commands on the database nodes.

  If any of the following statements are applicable to your use case, you need to provision the nodes manually:

  • Preprovisioned yugabyte:yugabyte user and group.
  • Sudo user requires a password.
  • The SSH user is not a sudo user.

• Use the SSH Key field to enter the full content of the private key available to the SSH user for gaining access via SSH into your instances.

  Ensure that the SSH key is pasted correctly in the RSA format: you need to paste the SSH RSA PEM key entry including the RSA key header such as -----BEGIN RSA PRIVATE KEY----- and footer such as -----END RSA PRIVATE KEY-----.

• Enable the Air Gap Install field if you want the installation to run in an air-gapped mode without expecting any internet access.

• Optionally, you may enable Advanced and complete the following:

  • Use the Desired Home Directory field to specify the home directory of the yugabyte user. The default value is /home/yugabyte.
  • Use the Node Exporter Port field to specify the port number for the node exporter. The default value is 9300.
  • Enable Install Node Exporter if you want the node exporter installed. You can skip this step if you have node exporter already installed on the nodes. Ensure you have provided the correct port number for skipping the installation.
  • The Node Exporter User field allows you to override the default Prometheus user. This is helpful when the user is preprovisioned on nodes (when the user creation is disabled). If overridden, the installer checks whether or not the user exists and creates the user if it does not exist.

• NTP Setup lets you to customize the Network Time Protocol server, as follows:

  • Select Manually add NTP Servers to provide your own NTP servers and allow the cluster nodes to connect to those NTP servers.
  • Select Don't set up NTP to prevent YugabyteDB Anywhere from performing any NTP configuration on the cluster nodes. For data consistency, ensure that NTP is correctly configured on your machine image.

Configure hardware for YugabyteDB nodes

Complete the Instance Types fields, as per the following illustration, to provide node hardware configuration (CPU, memory, and volume information):

• Use the Machine Type field to define a value to be used internally as an identifier in the Instance Type universe field.
• Use the Num Cores field to define the number of cores to be assigned to a node.
• Use the Mem Size GB field to define the memory allocation of a node.
• Use the Vol Size GB field to define the disk volume of a node.
• Use the Mount Paths field to define a mount point with enough space to contain your node density. Use /data. If you have multiple drives, add these as a comma-separated list, such as, for example, /mnt/d0,/mnt/d1.

Define regions and zones

Complete the Regions and Zones fields, as per the following illustration, to provide the location of YugabyteDB nodes:

YugabyteDB Anywhere will use these values during the universe creation.

Add YugabyteDB nodes

After finishing the provider configuration, click Manage Instances to provision as many nodes as your application requires.

For each node you want to add, click Add Instances to add a YugabyteDB node. You can use DNS names or IP addresses when adding instances (instance ID is an optional user-defined identifier).

Note that if you provide a hostname, the universe might experience issues communicating. To resolve this, you need to delete the failed universe and then recreate it with the use_node_hostname_for_local_tserver g-flag enabled.

Provision nodes manually

To provision your nodes manually, you have the following two options:

1. If the SSH user you provided has sudo privileges but requires a password, you can run the preprovisioning script.
2. If the SSH user does not have any sudo privileges, you need to set up the database nodes manually.

Running the preprovisioning script

This step is only required if you set Manually Provision Nodes to true and the SSH user has sudo privileges which require a password; otherwise you skip this step.

You can manually provision each node using the preprovisioning Python script, as follows:

1. Login to YugabyteDB Anywhere virtual machine via SSH.

2. Access the Docker yugaware container, as follows:

   sudo docker exec -it yugaware bash
   

3. Copy and paste the Python script prompted via the UI and substitute for a node IP address and mount points. Optionally, use the --ask_password flag if the sudo user requires password authentication, as follows:

   /opt/yugabyte/yugaware/data/provision/9cf26f3b-4c7c-451a-880d-593f2f76efce/provision_instance.py --ip 10.9.116.65 --mount_points /data --ask_password
   

   Expect the following output and prompt:

   Executing provision now for instance with IP 10.9.116.65...
   SUDO password:
   

4. Wait for the script to finish successfully.

5. Repeat step 3 for every node that will participate in the universe.

This completes the on-premises cloud provider configuration. You can proceed to Configure the backup target or Create deployments.

Setting up database nodes manually

This step is only required if you set Manually Provision Nodes to true and the SSH user does not have sudo privileges at all; otherwise you skip this step.

If the SSH user configured in the on-premises provider does not have sudo privileges, then you can set up each of the database nodes manually. Note that you need access to a user with sudo privileges in order to complete these steps.

For each node, perform the following:

• Set up time synchronization
• Open incoming TCP ports
• Preprovision the node
• Install Prometheus node exporter
• Install backup utilities
• Set crontab permissions
• Install systemd-related database service unit files (optional)

Set up time synchronization

A local Network Time Protocol (NTP) server or equivalent must be available.

Ensure an NTP-compatible time service client is installed in the node OS (chrony is installed by default in the standard CentOS 7 instance used in this example). Then, configure the time service client to use the available time server. The procedure includes this step and assumes chrony is the installed client.

Open incoming TCP/IP ports

Database servers need incoming TCP/IP access enabled to the following ports, for communications between themselves and YugabyteDB Anywhere:

The preceding table is based on the information on the default ports page.

Preprovision nodes manually

This process carries out all provisioning tasks on the database nodes which require elevated privileges. After the database nodes have been prepared in this way, the universe creation process from YugabyteDB Anywhere will connect with the nodes only via the yugabyte user, and not require any elevation of privileges to deploy and operate the YugabyteDB universe.

Physical nodes (or cloud instances) are installed with a standard CentOS 7 server image. The following steps are to be performed on each physical node, prior to universe creation:

1. Login to each database node as a user with sudo enabled (the centos user in centos7 images).

2. Add the following line to the /etc/chrony.conf file:

   server <your-time-server-IP-address> prefer iburst
   

   Then run the following command:

   sudo chronyc makestep   # (force instant sync to NTP server)
   

3. Add a new yugabyte:yugabyte user and group with the default login shell /bin/bash that you set via the -s flag, as follows:

   sudo useradd -s /bin/bash -m yugabyte   # (add user yugabyte and create /home/yugabyte)
   sudo passwd yugabyte   # (add a password to the yugabyte user)
   sudo su - yugabyte   # (change to yugabyte user for execution of next steps)
   

   Ensure that the yugabyte user has permissions to SSH into the YugabyteDB nodes (as defined in /etc/ssh/sshd_config).

4. Copy the SSH public key to each DB node. This public key should correspond to the private key entered into the YugabyteDB Anywhere provider.

5. Run the following commands as the yugabyte user, after copying the SSH public key file to the user home directory:

   cd ~yugabyte
   mkdir .ssh
   chmod 700 .ssh
   cat <pubkey file> >> .ssh/authorized_keys
   chmod 400 .ssh/authorized_keys
   exit   # (exit from the yugabyte user back to previous user)
   

6. Add the following lines to the /etc/security/limits.conf file (sudo is required):

   *                -       core            unlimited
   *                -       data            unlimited
   *                -       fsize           unlimited
   *                -       sigpending      119934
   *                -       memlock         64
   *                -       rss             unlimited
   *                -       nofile          1048576
   *                -       msgqueue        819200
   *                -       stack           8192
   *                -       cpu             unlimited
   *                -       nproc           12000
   *                -       locks           unlimited
   

7. Modify the following line in the /etc/security/limits.d/20-nproc.conf file:

   *          soft    nproc     12000
   

8. Install the rsync and OpenSSL packages (if not already included with your Linux distribution) using the following commands:

   sudo yum install openssl
   sudo yum install rsync
   

   For airgapped environments, make sure your Yum repository mirror contains these packages.

9. If running on a virtual machine, execute the following to tune kernel settings:

   sudo bash -c 'sysctl vm.swappiness=0 >> /etc/sysctl.conf'
   sudo sysctl kernel.core_pattern=/home/yugabyte/cores/core_%e.%p >> /etc/sysctl.conf
   

10. Perform the following to prepare and mount the data volume (separate partition for database data):

    • List the available storage volumes, as follows:

      lsblk
      

    • Perform the following steps for each available volume (all listed volumes other than the root volume):

      sudo mkdir /data   # (or /data1, /data2 etc)
      sudo mkfs -t xfs /dev/nvme1n1   # (create xfs filesystem over entire volume)
      sudo vi /etc/fstab
      

    • Add the following line to /etc/fstab:

      /dev/nvme1n1   /data   xfs   noatime   0   0
      

    • Exit from vi, and continue, as follows:

      sudo mount -av # (mounts the new volume using the fstab entry, to validate)
      sudo chown yugabyte:yugabyte /data
      sudo chmod 755 /data
      

Install Prometheus node exporter

Download the 1.3.1 version of the Prometheus node exporter, as follows:

wget https://github.com/prometheus/node_exporter/releases/download/v1.3.1/node_exporter-1.3.1.linux-amd64.tar.gz

If you are doing an airgapped installation, download the node exporter using a computer connected to the internet and copy it over to the database nodes.

On each node, perform the following as a user with sudo access:

1. Copy the node_exporter-1.3.1.linux-amd64.gz package file that you downloaded into the /tmp directory on each of the YugabyteDB nodes. Ensure that this file is readable by the user (for example, centos).

2. Run the following commands:

   sudo mkdir /opt/prometheus
   sudo mkdir /etc/prometheus
   sudo mkdir /var/log/prometheus
   sudo mkdir /var/run/prometheus
   sudo mv /tmp/node_exporter-1.3.1.linux-amd64.tar  /opt/prometheus
   sudo adduser --shell /bin/bash prometheus # (also adds group “prometheus”)
   sudo chown -R prometheus:prometheus /opt/prometheus
   sudo chown -R prometheus:prometheus /etc/prometheus
   sudo chown -R prometheus:prometheus /var/log/prometheus
   sudo chown -R prometheus:prometheus /var/run/prometheus
   sudo chmod +r /opt/prometheus/node_exporter-1.3.1.linux-amd64.tar
   sudo su - prometheus (user session is now as user “prometheus”)
   

3. Run the following commands as user prometheus:

   cd /opt/prometheus
   tar zxf node_exporter-1.3.1.linux-amd64.tar.gz
   exit   # (exit from prometheus user back to previous user)
   

4. Edit the following file:

   sudo vi /etc/systemd/system/node_exporter.service
   

   Add the following to the /etc/systemd/system/node_exporter.service file:

   [Unit]
   Description=node_exporter - Exporter for machine metrics.
   Documentation=https://github.com/William-Yeh/ansible-prometheus
   After=network.target
   
   [Install]
   WantedBy=multi-user.target
   
   [Service]
   Type=simple
   
   User=prometheus
   Group=prometheus
   
   ExecStart=/opt/prometheus/node_exporter-1.3.1.linux-amd64/node_exporter  --web.listen-address=:9300 --collector.textfile.directory=/tmp/yugabyte/metrics
   

5. Exit from vi, and continue, as follows:

   sudo systemctl daemon-reload
   sudo systemctl enable node_exporter
   sudo systemctl start node_exporter
   

6. Check the status of the node_exporter service with the following command:

   sudo systemctl status node_exporter
   

Install backup utilities

YugabyteDB Anywhere supports backing up YugabyteDB to Amazon S3, Azure Storage, Google Cloud Storage, and Network File System (NFS). For more information, see Configure backup storage.

You can install the backup utility for the backup storage you plan to use, as follows:

• NFS: Install rsync, which YugabyteDB Anywhere uses to perform NFS backups installed during one of the previous steps.

• Amazon S3: Install s3cmd, on which YugabyteDB Anywhere relies to support copying backups to Amazon S3. You have the following installation options:

  • For a regular installation, execute the following:

    sudo yum install s3cmd
    

  • For an airgapped installation, copy /opt/third-party/s3cmd-2.0.1.tar.gz from the YugabyteDB Anywhere node to the database node, and then extract it into the /usr/local directory on the database node, as follows:

    cd /usr/local
    sudo tar xvfz path-to-s3cmd-2.0.1.tar.gz
    sudo ln -s /usr/local/s3cmd-2.0.1/s3cmd /usr/local/bin/s3cmd
    

• Azure Storage: Install azcopy using one of the following options:

  • Download azcopy_linux_amd64_10.13.0.tar.gz using the following command:

    wget https://azcopyvnext.azureedge.net/release20211027/azcopy_linux_amd64_10.13.0.tar.gz
    

  • For airgapped installations, copy /opt/third-party/azcopy_linux_amd64_10.13.0.tar.gz from the YugabyteDB Anywhere node, as follows:

    cd /usr/local
    sudo tar xfz path-to-azcopy_linux_amd64_10.13.0.tar.gz -C /usr/local/bin azcopy_linux_amd64_10.13.0/azcopy --strip-components 1
    

• Google Cloud Storage: Install gsutil using one of the following options:

  • Download gsutil_4.60.tar.gz using the following command:

    wget https://storage.googleapis.com/pub/gsutil_4.60.tar.gz
    

  • For airgapped installations, copy /opt/third-party/gsutil_4.60.tar.gz from the YugabyteDB Anywhere node, as follows:

    cd /usr/local
    sudo tar xvfz gsutil_4.60.tar.gz
    sudo ln -s /usr/local/gsutil/gsutil /usr/local/bin/gsutil
    

Set crontab permissions

YugabyteDB Anywhere supports performing YugabyteDB liveness checks, log file management, and core file management using cron jobs.

Note that sudo is required to set up this service.

If YugabyteDB Anywhere will be using cron jobs, ensure that the yugabyte user is allowed to run crontab:

• If you are using the cron.allow file to manage crontab access, add the yugabyte user to this file.
• If you are using the cron.deny file, remove the yugabyte user from this file.

If you are not using either file, no changes are required.

You have finished configuring your on-premises cloud provider. Proceed to Configure the backup target or Create deployments.

Install systemd-related database service unit files

As an alternative to setting crontab permissions, you can install systemd-specific database service unit files, as follows:

1. Enable the yugabyte user to run the following commands as sudo or root:

   yugabyte ALL=(ALL:ALL) NOPASSWD: /bin/systemctl start yb-master, \
   /bin/systemctl stop yb-master, \
   /bin/systemctl restart yb-master, \
   /bin/systemctl enable yb-master, \
   /bin/systemctl disable yb-master, \
   /bin/systemctl start yb-tserver, \
   /bin/systemctl stop yb-tserver, \
   /bin/systemctl restart yb-tserver, \
   /bin/systemctl enable yb-tserver, \
   /bin/systemctl disable yb-tserver, \
   /bin/systemctl start yb-zip_purge_yb_logs.timer, \
   /bin/systemctl stop yb-zip_purge_yb_logs.timer, \
   /bin/systemctl restart yb-zip_purge_yb_logs.timer, \
   /bin/systemctl enable yb-zip_purge_yb_logs.timer, \
   /bin/systemctl disable yb-zip_purge_yb_logs.timer, \
   /bin/systemctl start yb-clean_cores.timer, \
   /bin/systemctl stop yb-clean_cores.timer, \
   /bin/systemctl restart yb-clean_cores.timer, \
   /bin/systemctl enable yb-clean_cores.timer, \
   /bin/systemctl disable yb-clean_cores.timer, \
   /bin/systemctl start yb-collect_metrics.timer, \
   /bin/systemctl stop yb-collect_metrics.timer, \
   /bin/systemctl restart yb-collect_metrics.timer, \
   /bin/systemctl enable yb-collect_metrics.timer, \
   /bin/systemctl disable yb-collect_metrics.timer, \
   /bin/systemctl start yb-zip_purge_yb_logs, \
   /bin/systemctl stop yb-zip_purge_yb_logs, \
   /bin/systemctl restart yb-zip_purge_yb_logs, \
   /bin/systemctl enable yb-zip_purge_yb_logs, \
   /bin/systemctl disable yb-zip_purge_yb_logs, \
   /bin/systemctl start yb-clean_cores, \
   /bin/systemctl stop yb-clean_cores, \
   /bin/systemctl restart yb-clean_cores, \
   /bin/systemctl enable yb-clean_cores, \
   /bin/systemctl disable yb-clean_cores, \
   /bin/systemctl start yb-collect_metrics, \
   /bin/systemctl stop yb-collect_metrics, \
   /bin/systemctl restart yb-collect_metrics, \
   /bin/systemctl enable yb-collect_metrics, \
   /bin/systemctl disable yb-collect_metrics, \
   /bin/systemctl daemon-reload
   

2. Ensure that you have root access and add the following service and timer files to the /etc/systemd/system directory (set their ownerships to the yugabyte user and 0644 permissions):
   
   

   yb-master.service

   [Unit]
   Description=Yugabyte master service
   Requires=network-online.target
   After=network.target network-online.target multi-user.target
   StartLimitInterval=100
   StartLimitBurst=10
   
   [Path]
   PathExists=/home/yugabyte/master/bin/yb-master
   PathExists=/home/yugabyte/master/conf/server.conf
   
   [Service]
   User=yugabyte
   Group=yugabyte
   # Start
   ExecStart=/home/yugabyte/master/bin/yb-master --flagfile /home/yugabyte/master/conf/server.conf
   Restart=on-failure
   RestartSec=5
   # Stop -> SIGTERM - 10s - SIGKILL (if not stopped) [matches existing cron behavior]
   KillMode=process
   TimeoutStopFailureMode=terminate
   KillSignal=SIGTERM
   TimeoutStopSec=10
   FinalKillSignal=SIGKILL
   # Logs
   StandardOutput=syslog
   StandardError=syslog
   # ulimit
   LimitCORE=infinity
   LimitNOFILE=1048576
   LimitNPROC=12000
   
   [Install]
   WantedBy=default.target
   

   yb-tserver.service

   [Unit]
   Description=Yugabyte tserver service
   Requires=network-online.target
   After=network.target network-online.target multi-user.target
   StartLimitInterval=100
   StartLimitBurst=10
   
   [Path]
   PathExists=/home/yugabyte/tserver/bin/yb-tserver
   PathExists=/home/yugabyte/tserver/conf/server.conf
   
   [Service]
   User=yugabyte
   Group=yugabyte
   # Start
   ExecStart=/home/yugabyte/tserver/bin/yb-tserver --flagfile /home/yugabyte/tserver/conf/server.conf
   Restart=on-failure
   RestartSec=5
   # Stop -> SIGTERM - 10s - SIGKILL (if not stopped) [matches existing cron behavior]
   KillMode=process
   TimeoutStopFailureMode=terminate
   KillSignal=SIGTERM
   TimeoutStopSec=10
   FinalKillSignal=SIGKILL
   # Logs
   StandardOutput=syslog
   StandardError=syslog
   # ulimit
   LimitCORE=infinity
   LimitNOFILE=1048576
   LimitNPROC=12000
   
   [Install]
   WantedBy=default.target
   

   yb-zip_purge_yb_logs.service

   [Unit]
   Description=Yugabyte logs
   Wants=yb-zip_purge_yb_logs.timer
   
   [Service]
   User=yugabyte
   Group=yugabyte
   Type=oneshot
   WorkingDirectory=/home/yugabyte/bin
   ExecStart=/bin/sh /home/yugabyte/bin/zip_purge_yb_logs.sh
   
   [Install]
   WantedBy=multi-user.target
   

   yb-zip_purge_yb_logs.timer

   [Unit]
   Description=Yugabyte logs
   Requires=yb-zip_purge_yb_logs.service
   
   [Timer]
   User=yugabyte
   Group=yugabyte
   Unit=yb-zip_purge_yb_logs.service
   # Run hourly at minute 0 (beginning) of every hour
   OnCalendar=00/1:00
   
   [Install]
   WantedBy=timers.target
   

   yb-clean_cores.service

   [Unit]
   Description=Yugabyte clean cores
   Wants=yb-clean_cores.timer
   
   [Service]
   User=yugabyte
   Group=yugabyte
   Type=oneshot
   WorkingDirectory=/home/yugabyte/bin
   ExecStart=/bin/sh /home/yugabyte/bin/clean_cores.sh
   
   [Install]
   WantedBy=multi-user.target
   

   yb-clean_cores.timer

   [Unit]
   Description=Yugabyte clean cores
   Requires=yb-clean_cores.service
   
   [Timer]
   User=yugabyte
   Group=yugabyte
   Unit=yb-clean_cores.service
   # Run every 10 minutes offset by 5 (5, 15, 25...)
   OnCalendar=*:0/10:30
   
   [Install]
   WantedBy=timers.target
   

   yb-collect_metrics.service

   [Unit]
   Description=Yugabyte collect metrics
   Wants=yb-collect_metrics.timer
   
   [Service]
   User=yugabyte
   Group=yugabyte
   Type=oneshot
   WorkingDirectory=/home/yugabyte/bin
   ExecStart=/bin/bash /home/yugabyte/bin/collect_metrics_wrapper.sh
   
   [Install]
   WantedBy=multi-user.target
   

   yb-collect_metrics.timer

   [Unit]
   Description=Yugabyte collect metrics
   Requires=yb-collect_metrics.service
   
   [Timer]
   User=yugabyte
   Group=yugabyte
   Unit=yb-collect_metrics.service
   # Run every 1 minute
   OnCalendar=*:0/1:0
   
   [Install]
   WantedBy=timers.target
   

Use node agents

To automate some of the steps outlined in Provision nodes manually, YugabyteDB Anywhere provides a node agent that you can run on each node meeting the following requirements:

• The node has already been set up with the yugabyte user group and home.
• The bi-directional communication between the node and YugabyteDB Anywhere has been established (that is, the IP address can reach the host and vice versa).

Installation

You can install a node agent as follows:

1. Download the installer from YugabyteDB Anywhere using the API token of the Super Admin, as follows:

   curl https://<yugabytedb_anywhere_address>/api/v1/node_agents/download --header 'X-AUTH-YW-API-TOKEN: <api_token>' > installer.sh && chmod +x installer.sh
   

2. Verify that the installer file contains the script.

3. Run the following command to download the node agent's .tgz file which installs and starts the interactive configuration:

   ./installer.sh -t install -u https://<yugabytedb_anywhere_address> -at <api_token>
   

   For example, if you execute ./installer.sh -t install -u http://100.98.0.42:9000 -at 301fc382-cf06-4a1b-b5ef-0c8c45273aef, expect the following output:

   * Starting YB Node Agent install
   * Creating Node Agent Directory
   * Changing directory to node agent
   * Creating Sub Directories
   * Downloading YB Node Agent build package
   * Getting Linux/amd64 package
   * Downloaded Version - 2.17.1.0-PRE_RELEASE
   * Extracting the build package
   * The current value of Node IP is not set; Enter new value or enter to skip: 10.9.198.2
   * The current value of Node Name is not set; Enter new value or enter to skip: Test
   * Select your Onprem Provider
   1. Provider ID: 41ac964d-1db2-413e-a517-2a8d840ff5cd, Provider Name: onprem
           Enter the option number: 1
   * Select your Instance Type
   1. Instance Code: c5.large
           Enter the option number: 1
   * Select your Region
   1. Region ID: dc0298f6-21bf-4f90-b061-9c81ed30f79f, Region Code: us-west-2
           Enter the option number: 1
   * Select your Zone
   1. Zone ID: 99c66b32-deb4-49be-85f9-c3ef3a6e04bc, Zone Name: us-west-2c
           Enter the option number: 1
           • Completed Node Agent Configuration
           • Node Agent Registration Successful
   You can install a systemd service on linux machines by running node-agent-installer.sh -t install-service (Requires sudo access).
   

4. Run the following command to enable the node agent as a systemd service, which is required for self-upgrade and other functions:

   sudo node-agent-installer.sh -t install-service  
   

When the installation has been completed, the configurations are saved in the config.yml file located in the node-agent/config/ directory. You should refrain from manually changing values in this file.

Registration

To enable secured communication, the node agent is automatically registered during its installation so the YugabyteDB Anywhere is aware of its existence. You can also register and unregister the node agent manually during configuration.

The following is the node agent registration command:

node-agent node register --api-token <api_token>

If you need to overwrite any previously configured values, you can use the following parameters within the registration command:

• --node_ip represents the node IP address.
• --url represents the YugabyteDB Anywhere address.

For secured communication, YugabyteDB Anywhere generates a key pair (private, public, and server certificate) that is sent to the node agent as part of its registration process.

To unregister a node agent, use the following command:

node-agent node unregister

Operations

Even though the node agent installation, configuration, and registration are sufficient, the following supplementary commands are also supported:

• node-agent node unregister is used for unregistersing the node and node agent from YugabyteDB Anywhere. This can be done to restart the registration process.
• node-agent node register is used for registering a node and node agent to YugabyteDB Anywhere if they were unregistered manually. Registering an already registered node agent fails as YugabyteDB Anywhere keeps a record of the node agent with this IP.
• node-agent service start and node-agent service stop are used for starting or stopping the node agent as a gRPC server.
• node-agent node preflight-check is used for checking if a node is configured as a YugabyteDB Anywhere node. After the node agent and the node have been registered with YugabyteDB Anywhere, this command can be run on its own, if the result needs to be published to YugabyteDB Anywhere. For more information, see Preflight check.

Preflight check

Once the node agent is installed, configured, and connected to YugabyteDB Anywhere, you can perform a series of preflight checks without sudo privileges by using the following command:

node-agent node preflight-check

The result of the check is forwarded to YugabyteDB Anywhere for validation. The validated information is posted in a tabular form on the terminal. If there is a failure against a required check, you can apply a fix and then rerun the preflight check.

Expect an output similar to the following:

If the preflight check is successful, you would be able to add the node to the provider (if required) by executing the following:

node-agent node preflight-check --add_node

Remove YugabyteDB components from the server

As described in Eliminate an unresponsive node, when a node enters an undesirable state, you can delete such node, with YugabyteDB Anywhere clearing up all the remaining artifacts except the prometheus and yugabyte user.

You can manually remove Yugabyte components from existing server images. Before attempting this, you have to determine whether or not YugabyteDB Anywhere is operational. If it is, you either need to delete the universe or delete the nodes from the universe.

To completely eliminate all traces of YugabyteDB Anywhere and configuration, you should consider reinstalling the operating system image (or rolling back to a previous image, if available).

Delete database server nodes

You can remove YugabyteDB components and configuration from the database server nodes as follows:

• Login to the server node as the yugabyte user.

• Navigate to the /home/yugabyte/bin directory that contains a number of scripts including yb-server-ctl.sh. The arguments set in this script allow you to perform various functions on the YugabyteDB processes running on the node.

• Execute the following command:

  ./bin/yb-server-ctl.sh clean-instance
  

  This removes all YugabyteDB code and settings from the node, removing it from the Universe.

  If you cannot find the bin directory, it means YugabyteDB Anywhere already cleared it during a successful deletion of the universe.

You should also erase the data from the volume mounted under the /data subdirectory, unless this volume is to be permanently erased by the underlying storage subsystem when the volume is deleted.

To erase this data, execute the following commands from the centos user on the node (or any user with access to sudo):

sudo umount /data

sudo dd if=/dev/zero of=/dev/sdb bs=1M

The preceding commands assume the data volume is attached to the server as /dev/sdb.

If there is a requirement to remove the yugabyte user, execute the following command:

sudo userdel -r yugabyte

If there is a requirement to remove the prometheus user, execute the following command:

sudo rm -rf /opt/prometheus

You may now choose to reverse the system settings that you configured in Provision nodes manually.

Delete YugabyteDB Anywhere from the server

To remove YugabyteDB Anywhere and Replicated components from the host server, execute the following commands as the root user (or prepend sudo to each command) :

systemctl stop replicated replicated-ui replicated-operator
service replicated stop
service replicated-ui stop
service replicated-operator stop
docker stop replicated-premkit
docker stop replicated-statsd

docker rm -f replicated replicated-ui replicated-operator \ replicated-premkit replicated-statsd retraced-api retraced-processor \ retraced-cron retraced-nsqd retraced-postgres

docker images | grep "quay.io/replicated" | awk '{print $3}' | xargs sudo docker rmi -f

docker images | grep "registry.replicated.com/library/retraced" | awk '{print $3}' | xargs sudo docker rmi -f

yum remove -y replicated replicated-ui replicated-operator

rm -rf /var/lib/replicated* /etc/replicated* /etc/init/replicated* \ /etc/default/replicated* /etc/systemd/system/replicated* \ /etc/sysconfig/replicated* \ /etc/systemd/system/multi-user.target.wants/replicated* \ /run/replicated*

rpm -qa | grep -i docker
yum remove docker-ce
rpm -qa | grep -i docker
yum remove docker-ce-cli