ERROR: Unable to communicate

arikgelman — Fri, 01 Mar 2019 12:33:54 GMT

Hi,

After a system restore (revert to snapshot) I am getting this error:

ERROR: Unable to communicate with root at local host:14141

When I type "grape" command, The error sometimes occurs and sometimes not

The cluster IP is not responding.

APIC-EM version 1.3.1.9

Please help.

Re: ERROR: Unable to communicate

aradford — Wed, 23 Nov 2016 07:02:16 GMT

you might need to do a "reset_grapevine". Make sure you say N to the questions, and the state of your controller will be preserved.

It looks like the services are not running.

Re: ERROR: Unable to communicate

arikgelman — Wed, 23 Nov 2016 07:22:55 GMT

Thank you very much for the fast response!

I need to run this command on all 3 servers?

Re: ERROR: Unable to communicate

aradford — Wed, 23 Nov 2016 07:53:03 GMT

No, you should be able to remove other servers from the cluster using the instructions in the troubleshooting guide.

Cisco Application Policy Infrastructure Controller Enterprise Module Troubleshooting Guide, Release 1.3.x - Troubleshoo…

To troubleshoot an issue with a multi-host cluster, you may need to remove a single host from a multi-host cluster. This procedure describes how to remove one of the hosts running Cisco APIC-EM from a multi-host cluster. You use theCisco APIC-EM configuration wizard to perform this procedure.

Note

The configuration wizard option to remove a host only appears if the host on which you are running the configuration wizard is part of a multi-host cluster. If the host is not part of a multi-host cluster, then the option to remove a host does not display. When performing this procedure, controller downtime occurs. For this reason, we recommend that you perform this procedure during a maintenance time period.

Before You Begin

You should have deployed Cisco APIC-EM on a multi-host cluster as described in the Cisco APIC-EM deployment guide.

You must perform this procedure on the single host that is to be removed from the multi-host cluster.

Step 1

Using a Secure Shell (SSH) client, log into the host (appliance, server, or virtual machine) with the IP address that you specified using the configuration wizard.

Note

The IP address to enter for the SSH client is the IP address that you configured for the network adapter. This IP address connects the appliance to the external network.

Step 2

When prompted, enter your Linux username ('grapevine') and password for SSH access.

Step 3

Enter the following command to access the configuration wizard.

$ config_wizard

Note

The config_wizard command is in the PATH of the 'grapevine' user, and not the "root" user. Either run the command as the "grapevine" user, or fully qualify the command as the "root" user. For example: /home/grapevine/bin/config_wizard

Step 4

Review the Welcome to the APIC-EM Configuration Wizard! screen and choose the option to remove the host from the cluster:

Remove this host from its APIC-EM cluster

Step 5

A message appears with the following options:

[cancel]—Exit the configuration wizard.
[proceed]—Begin the process to remove this host from its cluster.

Choose proceed>> to begin. After choosing proceed>>, the configuration wizard begins to remove this host from its cluster.

Step 6

At the end of this process, you must then either run the configuration wizard again to configure the host as a new Cisco APIC-EM or join the Cisco APIC-EM to a cluster.Important:

If you wish to use this host again as either a stand-alone controller or operating within a cluster, then you must run the configuration wizard again and re-install the Cisco APIC-EM. Do not attempt to use this host again as either a standalone host or within a cluster without re-installing the Cisco APIC-EM

Re: ERROR: Unable to communicate

arikgelman — Wed, 23 Nov 2016 21:05:56 GMT

Thank you! I will try this.

topic ERROR: Unable to communicate in Controllers

ERROR: Unable to communicate

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Re: ERROR: Unable to communicate