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Refer to the following steps to upgrade SCS for CentOS 7:

1. If static IP addresses were previously assigned before this upgrade, skip this step and proceed to step#2.

   1. Allow DHCP to assign IP addresses
      When the cluster nodes are rebooted, DHCP will assign an IP address to each node. If the nodes have already been booted with manually assigned IPs, the assigned IP addresses will remain the same. If IP addresses were not manually assigned, but existing DHCP leases are still in effect, then currently assigned IP addresses will remain the same. If existing DHCP leases have expired (or this is the first boot of the storage cluster), DHCP will assign IP addresses from the allocated pool in no particular order, so proceed to “Boot/reboot” Swarm nodes.

   2. Pre-assign an IP address to each storage node
      In this case, an IP address must be manually assigned to each storage node before it is rebooted. The procedure for manual assignment is fully explained in Configuring Swarm for Static IPs with Swarm Cluster Services (SCS)).
      The summary of the manual assignment procedure is:

      1. Get an instance list that provides a node ID to use in the next step.

         Code Block
         scsctl storage instance list

      2. Assign an IP address to each node.

         Code Block
         scsctl storage config set -d -i {chassis ID} "network.ipV4Address={your.static.address.here}"

2. Install the new RPM.

   Code Block
   rpm -Uvh swarm-scs-[version].x86_64.rpm

3. Run the following command.

   Code Block
   scsctl diagnostics upgrade_check

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