Installation FAQs

I cannot access CloudByte ElastiCenter after successful installation. Why?

This might be because of one of the following reasons:

  • Java Service is not running
  • Database is not up and running

To resolve this issue, do either or both of the following:

  1. In the ElastiCenter server, at command prompt, run the following command:
    pgrep mysql
    .
  2. If you do not get the MySql process ID, run the following command to bring up the database service:

    service mysql-server onerestart			

  3. In the ElastiCenter server, at command prompt, run the following:
    pgrep java
    .

    If you don’t get the Java process ID, run the following command to bring up the Java service:

    service cbdevman onerestart
    			

  4. Try accessing ElastiCenter.

Can you explain the memory requirements for installing CloudByte ElastiStor?

The following table provides the details. The values are same for installing both Node and ElastiCenter. Also, the same values apply if you install both Node and ElastiCenter on the same machine:

Memory Minimum Recommended
RAM 1 GB 8 GB or higher
Hard Disk 20 GB (2.4 X RAM size + 32 GB) or higher. For example, if the RAM is 8 GB, for better performance, 52 GB or higher is recommended

If you do not comply with the recommended hard disk memory, you might encounter a message that prompts correction (for better performance). However, if you meet the minimum memory requirements, even if you ignore the message, installation will be successful.

I get the message ‘Installation cannot proceed as no NIC is present’. What will I do?

You encounter this issue because the NIC that you use is not supported. For a list of supported NICs and other hardware, see the Hardware Compatibility List.

I get the message ‘Installation cannot proceed as no disk is present’. What will I do?

This is because the internal RAID/SAS card in the server is not supported. For a list of supported disks and other hardware, see the Hardware Compatibility List.

What if I get a mountroot during installation?

Retry installing by reinserting the CD. Also ensure that there are no network issues.

If the issue persists, use the following command to proceed:

 mountroot > cd9669:/dev/cd0 ro

Why am I not able to access the system after the first reboot post installation?

Verify the following:

  • ElastiStor has correctly rebooted. This is indicated by the root login prompt when the installation concludes.
  • Network port connectivity
  • Network details are correctly added

Will the installation rollback on failure?

Yes.

Explain the upgrade options for ElastiStor?

You can upgrade based on the option that you have selected in the existing installation. That is, if you have opted to install both Node and ElastiCenter, then you have the option to upgrade both.

What happens to the installation when there is a hard disk failure?

Installation may or may not be successful, but the product is unlikely to function.

What happens if the CD ROM gets disconnected while installing?

Reconnect and start the installation from the beginning.

Do I need an internet connection for installing CloudByte?

No. But it is recommended because it facilitates time synchronization with NTP.

What happens if the network connection is lost and system boots after installing?

It waits for the connectivity to be restored and then boots up.

Is it mandatory to do a disk mirror while installing?

Recommended for production environments.

What happens to the installation during a power loss?

You have to reinstall.

Can I install ElastiStor my laptop?

Yes. If you meet the minimum hardware requirements, the installation is not devise dependent.

Can I install ElastiCenter on a virtual machine?

Yes. CloudByte recommends you to have a minimum requirement of 8 GB RAM on your VM.

Is ElastiStor installation possible over SAN boot?

Yes

Can I downgrade my ElastiStor installation?

Not currently supported

Can I do a network installation of CloudByte ElastiStor?

Not currently supported

After I installed ElastiCenter on ESX 5.0, my virtual machine stopped responding. Why?

If your virtual machine on ESX 5.0 hangs, do the following:

  1. (In the ElastiCenter command prompt) Run the following command:
    sysctl kern.timecounter.hardware=ACPI-fast
  2. Run the following command to edit the loader.conf file:
    vi /boot/loader.conf
  3. Append the loader.conf with the following line:
    kern.timecounter.hardware=ACPI-fast

I did not come across the ElastiCenter HA option while installing ElastiCenter. Why?

The option to configure ElastiCenter HA is available only when you choose the installation option Both ElastiCenter and Node i.e., installing both ElastiCenter and Node on a single machine. For details, see http://www.docs.cloudbyte.com/installing-both-elasticenter-and-node/

Can I back up ElastiCenter even if I haven’t configured ElastiCenter HA?

Yes. You can setup a secondary ElastiCenter (secondary setup) to ensure backup in the case your primary ElastiCenter (primary setup) fails. If a failure occurs, you can promote your secondary setup. For details, see http://www.docs.cloudbyte.com/cloudbyte-elastistor-product-faqs/promoting-secondary-elasticenter-and-backing-up-configurations/

Does installing ElastiCenter in HA mode involve any manual procedures?

No. During installation, one ElastiCenter is installed as primary and the second one as secondary.

Is it mandatory to have ElastiCenters and ElastiStor Nodes on the same subnet?

Not necessary for them to be on the same Subnet as long as the IP address is reachable.