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Version: 3.2

Storageless nodes with Portworx Enterprise for OpenShift with FlashArray

Portworx Enterprise can be run in a client-only mode such that the storage available in a Portworx can be consumed by apps that are running on nodes that have no storage. This enables deployments to leverage the powerful Portworx Enterprise features from any node without having to rely on legacy protocols and adopt containerization faster.

Add a new storageless node to your Portworx cluster​

Display the status of your Portworx cluster​

pxctl status
Status: PX is operational
Node ID: xxxxxxxx-xxxx-xxxx-xxxx-c9d0eb597668
	IP: X.X.X.185
 	Local Storage Pool: 1 pool
	Pool	IO_Priority	Size	Used	Status	Zone	Region
	0	LOW		100 GiB	1.0 GiB	Online	default	default
	Local Storage Devices: 1 device
	Device	Path				Media Type		Size	Last-Scan
	0:1	/dev/mapper/volume-a9e55549	STORAGE_MEDIUM_SSD	100 GiB08 Jan 17 23:15 UTC
	total					-			100 GiB
Cluster Summary
	Cluster ID: xxxxxxxx-xxxx-xxxx-xxxx-0242ac110002
	Node IP: X.X.X.185 - Capacity: 1.0 GiB/100 GiB Online (This node)
	Node IP: 10.99.117.129 - Capacity: 1.2 GiB/100 GiB Online
	Node IP: X.X.X.197 - Capacity: 2.0 GiB/320 GiB Online
	Node IP: 10.99.119.1 - Capacity: 1.2 GiB/100 GiB Online
Global Storage Pool
	Total Used    	:  5.3 GiB
	Total Capacity	:  620 GiB

Add a new node to this cluster with no storage​

As shown in the command below, a new node is added to the cluster by using the same cluster token which is formed by the cluster id of the existing cluster (which is xxxxxxxx-xxxx-xxxx-xxxx-0242ac110002 as shown above):

docker run --restart=always --name px-enterprise -d --net=host --privileged=true -v /run/docker/plugins:/run/docker/plugins \
-v /var/lib/osd:/var/lib/osd:shared -v /dev:/dev -v /etc/pwx:/etc/pwx -v /opt/pwx/bin:/export_bin:shared \
-v /var/run/docker.sock:/var/run/docker.sock -v /mnt:/mnt:shared -v /var/cores:/var/cores -v /usr/src:/usr/src \
portworx/px-enterprise -m team0:0 -d team0 -z

The -z option in the command above starts this node as a zero storage node.

note

If you already have config.json in /etc/pwx/, the config.json settings will take precedence over the -z option. If your deployment or automation scripts place the file on every node, make sure to remove it in order for -z option to take effect.

Display the cluster node list​

pxctl cluster list
Cluster ID: xxxxxxxx-xxxx-xxxx-xxxx-0242ac110002
Status: OK

Nodes in the cluster:
ID					DATA IP		CPU		MEM TOTAL	MEM FREE	CONTAINERS	VERSION		STATUS
xxxxxxxx-xxxx-xxxx-xxxx-c9d0eb597668	X.X.X.185	0.625782	8.4 GB	8.0 GB		N/A		1.1.3-b33d4fa	Online
xxxxxxxx-xxxx-xxxx-xxxx-d3478c485a61	10.99.119.1	0.625		8.4 GB	8.0 GB		N/A		1.1.3-b33d4fa	Online
xxxxxxxx-xxxx-xxxx-xxxx-a74ee09030e3	X.X.X.55	16.20603	8.4 GB	8.0 GB		N/A		1.1.3-b33d4fa	Online
xxxxxxxx-xxxx-xxxx-xxxx-3e2b01cd0bc3	X.X.X.197	0.375469	8.4 GB	7.9 GB		N/A		1.1.3-b33d4fa	Online
xxxxxxxx-xxxx-xxxx-xxxx-dd5084dce208	10.99.117.129	0.749064	8.4 GB	8.0 GB		N/A		1.1.3-b33d4fa	Online

Check node and cluster status​

The status below shows that the new node (X.X.X.55) is the zero storage node that has been added to the cluster

pxctl status
Status: PX is operational
Node ID: xxxxxxxx-xxxx-xxxx-xxxx-a74ee09030e3
	IP: X.X.X.55
 	Local Storage Pool: 0 pool
	Pool	IO_Priority	Size	Used	Status	Zone	Region
	No storage pool
	Local Storage Devices: 0 device
	Device	Path	Media Type	Size		Last-Scan
	No storage device
	total		-	0 B
Cluster Summary
	Cluster ID: xxxxxxxx-xxxx-xxxx-xxxx-0242ac110002
	Node IP: X.X.X.55 - Capacity: 0 B/0 B Online (This node)
	Node IP: X.X.X.197 - Capacity: 2.0 GiB/320 GiB Online
	Node IP: 10.99.117.129 - Capacity: 1.2 GiB/100 GiB Online
	Node IP: X.X.X.185 - Capacity: 1.0 GiB/100 GiB Online
	Node IP: 10.99.119.1 - Capacity: 1.2 GiB/100 GiB Online
Global Storage Pool
	Total Used    	:  5.3 GiB
	Total Capacity	:  620 GiB

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