Managing Nodes
In the S1 system, storage is provided through the use of storage node
servers. Everything is connected to the system through these node
servers. The Node section provides information about the
status of the nodes. It allows you to connect to a specific node, edit
the names of the nodes, and perform giveback and takeover actions.
Additionally, you can utilize the support tunnel for encrypted
communication with the system and use command line utilities to test
connectivity with the node servers.
To access the Nodes section, select Inventory 
> Nodes
. A table listing
all of the available server nodes displays. To expand or filter the
table by columns, select following controllers.
- Sensors: To display system status from the server nodes’ sensors.
- Gateway: To display information about server nodes gateway.
- Vols: To display information about the volumes in each of the nodes.
- IP: To display the IP nodes of each of the nodes.
- Sed: To display information about self encrypted drive.
Server node Id
To display a list of server node IDs, select Sessions from the top menu control. A table listing the names of the nodes and their related IDs displays. To filter the table for an ID of a particular server node select the node in the Node drop-down.
Connect to a node
To connect to a particular node, select Connect from the top menu control. Select the node in the Node drop-down and Submit. This changes the current management connection to the selected node.
Rename a node server
To rename a node, select Edit from the top control menu. Select the node in the Node drop-down list and enter a name in the Newname field. Select Submit.
Takeover
This operation changes the high availability state of the nodes. It allows one server node to take over all the volumes from the other server node. This changes the state of the server node that takes over the volumes to all and the other server node to none. To perform this operation, select Takeover from the top menu controllers. Select the node server in the Node drop-down and Submit. To force the take over operation check the Force checkbox before submitting.
Giveback
This operation changes the high availability state of the nodes. This operation may performed in the case where one server node took all volumes from the other server node. In such a case the server node may giveback the volumes to the other server node. To perform this operation, select Giveback from the top menu controller and Submit.
Encrypting communication through support tunnel
Support tunnel refers to a mechanism that allows remote access and
support to a network device or system. It enables secure connection
using secure protocols such as SSH (Secure Shell) or VPN (Virtual
Private Network).
To access the Tunnel section, select Inventory
>
Nodes = Support 
> Tunnel 
. A table listing the support status of the
tunnel is displayed. If the support tunnel of a node is enabled, then the encryption key appears in the Support Tunnel Status column, inside the parenthesis.
Disabling a support tunnel
To disable a support tunnel for a node, select Disable from the top menu control. Select a node in the Node drop-down list and Submit.
Enabling a support tunnel
To enable a support tunnel for a node, select Enable from the top menu control. Select a node in the Node drop-down list and Submit.
Using Utilities to test connectivity
To test and measure network connectivity with the server, select Utils
.
- Node: Select the server node to test connectivity.
- Utility: To run commands on the selected server node. Options for the commands are:
- Args: Enter the IP address of the node. The IP may be preceded
by command modifiers. For example, for a node in IP 192.168.60.20
and command ping, you may enter
-c 3 192.168.60.20to limit the results to three pings. - Timeout Seconds: To limit the operation of each of the commands. If not specified, then each command has a timeframe of ten seconds to run.