Two or more Peers are are frequently disconnecting and reconnecting from a Cluster

Two or more Peers are are frequently disconnecting and reconnecting from a Cluster

Symptoms:
  1. Two or more Peers are are frequently disconnecting and reconnecting from a Cluster
    1. Peers disappear temporarily from Access page on Coordinator
    2. Only one of the affected Peers appears on the Access page on Coordinator at any time
  2. CPU usage for the sccpd may be unusually high on affected Peers and/or Coordinator
  3. The Cluster page on the Coordinator may not load properly

Cause:
  1. Each Peer needs to have a unique ID.  If two or more Peers try to connect with the same ID, the newer connection will be online and the previous Peer will be disconnected from the Cluster.  The disconnected Peer will usually try to reconnect again.  This results in the affected Peers alternating which is connected at any given moment.
  2. Check if the affected Peers have identical ID strings in /etc/cluster.conf on the Coordinator
  3. This is typically occurs when applying the configuration of a clustered unit onto another unit resulting in the duplicate IDs.

Solution:
  1. Disable Clustering on affected Peers
  2. Verify the affected Peers are no longer listed in /etc/cluster.conf on Coordinator
  3. Run on one Peer to give it a unique identity: uuidgen > /etc/identity
    1. Verify the identities are different on each affected Peer
  4. Reboot the Peer which has the new identity
  5. Re-add each Peer to Cluster
  6. Verify both Peers are Online simultaneously

    • Related Articles

    • How to: Setup the multi-clustering on the Nodegrid OS

      This article deals with the description and the configuration of the multi-clustering feature on the Nodegrid OS. Description: Multi-Clustering allows a centralized view and access across various clusters, therefore across various Datacenters and ...

    • How to configure Nodegrid for OKTA in cluster

      Single Sign-on (SSO) enables users to authenticate with multiple applications using only one set of credentials. Nodegrid can also be configured for OKTA in cluster so okta user can login in the coordinator and the user can access the connected ...

    • OpenSSL 3.0 Vulnerability - CVE-2022-3602 and CVE-2022-3786

       OpenSSL released version 3.0.7 on Nov 1st, 2022 - patching two related vulnerabilities both currently rated as "High". Initially, CVE-2022-3602 was rated "Critical" and downgraded after analysis.   Currently, there are two production versions of ...

    • Wireguard Configuration in Nodegrid 5.2 and newer

      Overview Wireguard is a current tunnel solution which is part of current Linux distributions. The Solutions are making its way into the some business applications and is for example currently supported by 128 Technologie and Perimeter81. Advantages: ...

    • Steps to Secure Nodegrid

      The attached document describes the recommended security settings for your Nodegrid before connecting it to the network.