Weka System Installation Process Using the CLI
This page describes the stages in the installation process when using the CLI.
Last updated
This page describes the stages in the installation process when using the CLI.
Last updated
Run the untar command and install.sh
command, according to the instructions, on each host.
On completion of this stage in the installation process, the Weka software is installed on all the allocated hosts and running in the stem mode i.e., no cluster is attached and the Weka system is awaiting instructions.
Note: If a failure occurs during this installation stage, an error message detailing the source of the failure will be received. If possible, try to recover this error or alternatively, contact the Weka Support Team.
Command: weka cluster create
This stage involves the formation of a cluster from the allocated hosts. It is performed using the following command line:
weka cluster create <hostnames> [--host-ips <ips | ip+ip+ip+ip>]
Parameters in Command Line
Note: It is possible to use either a host-name or an IP address; this string serves as the identifier of the host in subsequent commands.
Note: If a host-name is used, make sure that the host-name to IP resolution mechanism is reliable since a failure of this mechanism will cause a loss of service in the cluster. It is recommended to add the host-names to /etc/hosts
.
Note: After successful completion of this command, the cluster is in the initialization phase, and some commands can only run in this phase.
Note: For configuring HA, at least two cards must be defined for each host.
On successful completion of the formation of the cluster, every host receives a host ID. Use of the command line weka cluster host
will display a list of the hosts and IDs.
Note: In IB installations the --hosts-ips
parameter must specify the IP addresses of the IPoIB interfaces.
Command: weka cluster update
This command is used to give the cluster a name. Although this is optional, it is highly recommended, because the name enables cloud event notification and increases the ability of the Weka Support Team to resolve any issues that may occur. To perform this operation, use the following command line:
weka cluster update --cluster-name=<cluster-name>
Parameters in Command Line
Command: weka cloud enable
This command enables cloud event notification (via Weka Home), which increases the ability of the Weka Support Team to resolve any issues that may occur.
To learn more about this and how to enable cloud event notification, refer to Weka Support Cloud.
In closed environments, such as dark sites and private VPCs, it is possible to install a private instance of Weka Home.
Command: weka cloud enable --cloud-url=http://<weka-home-ip>:<weka-home-port>
This command enables the use of a private instance of Weka Home.
For more information, refer to Private Instance of Weka Home and contact the Weka Support Team.
Command: weka cluster host dedicate
It is possible to set the host as dedicated to the Weka cluster. By setting the host to dedicated, no other application is expected to run on it, and the Weka system optimizes it for performance and stability. For example, the host can be rebooted by the system at need, and all the host's memory is allocatable by the Weka processes.
Command: weka cluster host net add
When PKEYs are used, the device name for InfiniBand should follow the name.PKEY convention.
Note: Although in general, devices can be renamed arbitrarily, Weka will only function correctly if the .PKEY naming convention is followed.
The networking type can be either Ethernet (direct over DPDK) or InfiniBand (IB), and can be mixed in the same host (by running multiple cluster host net add
commands for the same host). A physical network device must be specified for both types. This can be a device dedicated to the Weka system or a device that is also being used for other purposes in parallel. For IP over DPDK, the standard routing parameters can be specified for routed networks.
To perform this operation, the cluster host net add
command must be run for each host. The commands can run from one host configuring another host, so they can all run on a single host. The IP addresses specified using this command are the data plane IPs allocated in the planning stage. To perform this operation, use the following command line:
weka cluster host net add <host-id> <device> [--ips-type=<POOL|USER>] [--ips=<ips>]... [--gateway=<gateway>] [--netmask=<netmask>] [--label=<label>]
Parameters in Command Line
The number of IP addresses should be according to Weka Networking and Networking Prerequisites.
Note: Additional IP addresses may be assigned for each host if IP per core is needed. In this case, unused IP addresses are reserved for future expansions and can be automatically assigned if the number of cores assigned to the Weka system on that host is increased.
Note: For HA configurations, this command has to be run separately for each interface.
Command: weka cluster default-net set
Instead of explicit IP address configuration per each network device, dynamic IP address allocation is supported. Weka supports adding a range of IP addresses to a dynamic pool, from which the IP addresses can be automatically allocated on demand.
For Ethernet networking only, a mixed approach is supported: for certain network devices the IP addresses are assigned explicitly by the administrator, while the other devices in the cluster get an automatic allocation from the IP range. Such an approach could be useful in an environment where clients are being spawned automatically.
weka cluster default-net set --range <range> [--gateway=<gateway>] [--netmask-bits=<netmask-bits>]
Parameters in Command Line
To view the current default data networking settings use the command weka cluster default-net
.
If a default data networking was previously configured on a cluster and is no longer needed, it is possible to remove it using the command weka cluster default-net reset
.
Command: weka cluster drive add
This stage in the installation process is used to add a local SSD to be used by a Weka filesystem. The same command can be used for adding multiple drive paths. To perform this operation, use the following command line:
weka cluster drive add <host-id> <device-paths>
Parameters in Command Line
Note: If, due to some technical limitation, the use of an NVMe device through the kernel is required, contact the Weka Support Team.
Command: weka cluster host cores
This stage in the installation process is used to configure the number of CPU resources, which are physical rather than logical cores. To perform this operation, use the following command line:
weka cluster host cores <host-id> <cores> [--frontend-dedicated-cores <frontend-dedicated-cores>] [--drives-dedicated-cores <drives-dedicated-cores>] [--cores-ids <cores-ids>]
Parameters in Command Line
Note: cores-ids
are distributed in the following order: first, all the FrontEnd processes, second, all the Compute processes, and last, all the Drive processes. By ordering the cores-ids
list, it is possible to determine the exact assignment of cores to processes (e.g., for taking into account NUMA distribution).
For example: If we have 1 FrontEnd, 2 Compute, and 3 Drive, setting cores-ids
to 1, 2, 4, 3, 5, 6
will put the FrontEnd on core 1, Compute on cores 2 and 4, and Drive on cores 3, 5 and 6. Assuming cores 1, 2, 3 are at NUMA 0 and cores 4, 5, 6 are at NUMA 1, we will have the following distribution of processes:
NUMA 0: FrontEnd, Compute, Drive
NUMA 1: Compute, Drive, Drive
Note: Performance can be optimized by assigning different functions to the various Weka cores. If necessary, contact the Weka Support Team for more information.
Command: weka cluster host memory
As defined in the memory requirements, the fixed memory per host and the per compute/SSD cores memory are automatically calculated by the Weka system. By default, 1.4 GB is allocated per compute-core, out of which 0.4 GB is left for the capacity-oriented memory. If the host is set as dedicated, all the memory left after reductions, as described in Memory Resource Planning, is automatically allocated for the Weka system.
If capacity requirements mandate more memory, the following command should be used:
weka cluster host memory <host-id> <capacity-memory>
Parameters in Command Line
Note: This command is given the memory per-host and will later be distributed by the system per compute core. Out of this value, 1GB per compute core is reserved for other purposes (as cache) and not used for capacity.
Command: weka cluster host failure-domain
This optional stage in the installation process is used to assign a host to a failure domain. If the specified failure domain does not exist, it will be created by this command. If the host is assigned to another failure domain, it will be reassigned by this command.
Note: All hosts not assigned to any failure domain will be considered by the Weka system as an additional failure domain. However, it is good practice to either not define failure domains at all or to assign each host to a single failure domain.
This operation is performed using the following command line:
weka cluster host failure-domain <host-id> [--name <name>] | [--auto]
Parameters in Command Line
Command: weka cluster update
To configure the Weka system protection scheme, use the following command line:
weka cluster update [--data-drives=<data-drives>] [--parity-drives=<parity-drives>]
Parameters in Command Line
Note: This command can only be used in the initialization phase.
Command: weka cluster hot-spare
To configure the Weka system hot spare, use the following command line:
weka cluster hot-spare <count>
Parameters in Command Line
Command: weka cluster host apply
This command is used to apply the Weka system cluster hosts' configuration. In the install phase, all hosts need to be added, so the --all
parameter can be used.
To activate the cluster hosts, use the following command line:
weka cluster host apply [--all] [<host-ids>...] [--force]
Parameters in Command Line
Command: weka cluster license set / payg
At this point, you've finished configuring and deploying the cluster. In order to be able to run IOs against the cluster, you would need to deploy a license. Follow the steps in obtaining a license section to obtain a valid license and deploy it to the Weka cluster.
Command: weka cluster start-io
To start the system IO and exit from the initialization phase, use the following command line:
weka cluster start-io
After successful completion of this command, the system exits the initialization state and accepts IOs from the user applications.