Bright Cluster Manager Knowledge Base

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User Management: How do I authenticate against Kerberos?
Answer: How do I authenticate against Kerberos? How do I authenticate agains Kerberos? For Red Hat based system such as RHEL, CentOS or Scientific Linux: Rather than modifying files ...
Support And Documentation: Where can I find documentation?
Answer: 1. http://support.brightcomputing.com/manuals is where the main documentation for Bright Cluster Manager is at, in the form of manuals. Manuals for Bright Cluster Manager up to version ...
Cluster Management: How can a custom command be run in cmsh?
Answer: Custom commands can be of two kinds: external to cmsh or internal to cmsh. external to cmsh If the custom command is an executable from the main ...
Cluster Management: CMDaemon won't restart my service like it is supposed to. But I can start the
Answer: Normally CMDaemon restarts a service that fails. However, one of the possibilities is that CMD has given up due to persistent failure. In the Administrator Manual, ...
Cluster Management: My cluster is showing odd errors. What should I do?
Answer: A cluster can sometimes show general weirdness, throwing up odd non-specific errors. A checklist of suggestions to go through first: 1. check the hardware. Burn tests such as ...
Configuring: How do I add a login node?
Answer: How do I add a login node? Table of contents Why have a login node?What do we need to consider for login nodes?1. Make a login image ...
Workload Management: How can a PBSPro Server installed externally get recognized by a head node?
Answer: An externally installed PBS Pro server is not visible to Bright Cluster Manager, by default. But this can be made possible, with a few tricks, as ...
Workload Management: How do I integrate externally executed UGE/SGE server with Bright Cluster Manager 6.0?
Answer: Mount the $SGE_ROOT directory from your external server that is to be managed by the Bright Cluster Manager (BCM) head node. Make sure that q* ...
Day-to-day Administration: My LDAP server won't start because the database is corrupt. How do I fix it?
Answer: My LDAP server won't start because the database is corrupt. How do I fix it? Possible cause OpenLDAP uses a storage format (BerkeleyDB) which is known to ...
General: Is upgrading from version 5.2 to 6.0 possible by changing the download repositories?
Answer: No. You can't upgrade directly from 5.2 to 6.0 because the APIs and CMDaemon database have changed significantly. Trying to do this would be pretty complicated ...
Cluster Management: I've revoked a certificate, how can I remove it?
Answer: You can't. Certificates that have been issued and/or revoked, cannot be removed with Bright Cluster Manager. This is because even if you would be able to ...
Cluster Management: How can I reduce the size of cmdaemon and node installer logs?
Answer: By default, cmdaemon, node installer and some other Bright Cluster Manager logs are handled with logrotate. The options for these can be set in:/etc/logrotate.d/cmdaemonThe logrotate ...
Configuring: How do I make regular nodes return an FQDN using 'hostname -f'? Or resolve the
Answer: How do I make regular nodes return an FQDN using 'hostname -f'? Or resolve the hostnames to IPs on the external network? There are two ways ...
Cluster Management: When does a node need to be restarted?
Answer: When does a node need to be restarted? Why does a node need to be restarted? Can I ignore it? How do I clear that ...
Configuring: My external IPoIB hardware isn't fragmenting packets properly, how do I fix that?
Answer: Background While IP over Infiniband (IPoIB) on the internal network is handled without a problem because it all runs on IB hardware, IPoIB on an external ...
Configuring: How do I customize postfix?
Answer: Short answer: The standard linux way, on the head node only. For Bright Cluster Manager 7 onwards, the relay host can be managed by BCM in ...
General: How do I offload my user portal?
Answer: This question is about clusters that have the head node in a failover configuration.By default, the user portal is served by the active node. That ...
Workload Management: How do I integrate a custom torque installation with Bright Cluster Manager?
Answer: If you install torque using a path that is different from the standard BCM one, then you should carry out the following steps (BCM version ...
High Availability: Can I replicate my own MySQL database using the failover mechanism supplied by Bright?
Answer: Yes. All the MySQL databases can be replicated between the active and passive, not just CMDaemon and Slurm. (Have a look in the Admin Manual for ...
General: Should I worry about CMDaemon hogging unreasonable resources from my cluster?
Answer: Short answer: No. Longer answer: Good admins itch to wring every last drop of possible performance out of a cluster, so they naturally want to get rid of ...
Cloudbursting: How do I change the openVPN port used to access the cloud ?
Answer: How do I change the openVPN port used to access the cloud ? By default, Cluster Extension (hybrid) cloudbursting uses UDP port 1194 to run a ...
Cluster Management: How do I install the JSON cmgui ?
Answer: The standalone JSON cmgui, available in Bright 6.0 and upwards, can run on any regular desktop client machine, including on a MacOS desktop. The software ...
Initialize And Finalize Scripts: How do I write information out to a hard drive during pre-provisioning?
Answer: How do I write information out to a hard drive during pre-provisioning? With a finalize script you write to somewhere under localdrive, which is the root ...
Cluster Management: How do I know when a clone operation has completed?
Answer: We would like to know when exactly the clone of an image has completed. This is so we can automate some image update and test ...
High Availability: How do I rename my head nodes?
Answer: I've got a failover setup. How do I rename my head nodes? The following works even if you are exchanging names: Eg: head 1 is a white ...
Configuring: Why is the Ethernet switch port-based identification not working?
Answer: Why is the Ethernet switch port-based identification not working?IntroductionThe steps below will help you troubleshoot why port-based identification on an Ethernet switch might not be ...
Node Provisioning: How do I set up a root FS over Lustre?
Answer: How do I set up a root FS over Lustre? This article describes how to configure a cluster so that the compute nodes mount their root ...
High Availability: Why are my filesystems no longer exported from my head node after setting up HA?
Answer: Why are my filesystems no longer exported from my head node after setting up HA? Short answer: It is done by Bright to protect the filesystems ...
Workload Management: Why is my workload manager configuration changed by Bright?
Answer: Why is my workload manager configuration changed by Bright? Or perhaps: How do I make configuration changes to the workload manager (WLM) permanent? If the configuration changes of ...
Day-to-day Administration: Can I mix Linux distributions on my cluster?
Answer: Can the Bright Cluster Manager (BCM) be used to manage a mix of Linux distributions within the same cluster?Yes. Introduction With BCM, multiple, different images can be ...
Cluster Monitoring: Why do I have no monitoring history for disk-related metrics?
Answer: Why do I have no monitoring history for disk-related metrics? (or, approaching this issue from the other side) Too many disks are causing too many metrics -- ...
User Management: How do I integrate Bright with AD Using SSSD 's LDAP provider and Simple BIND?
Answer: How do I integrate a Bright cluster into an Active Directory domain with SSSD 's LDAP provider? (The method in "How do I authenticate against Active ...
Third Party Software: How can I login to cmgui with a one-time password?
Answer: How can I authenticate to cmgui with a one-time password? Introduction: One time password (OTP) authentication overcomes replay attacks. It allows an administrator to login to a ...
Security: How do I change the cipher list CMDaemon negotiates with clients?
Answer: Can I change the cipher list that CMDaemon will negotiate with clients? Yes, this is possible in Bright 6.x with a CMDaemon revision >=17802. To ...
Configuring: How do I configure a generic node as an external DNS entry on the head
Answer: How do I configure a generic node as an external DNS entry on the head node?A non-managed bright node is a generic device that is ...
User Management: How can I migrate system users to LDAP?
Answer: How can I migrate users and groups from /etc/passwd and /etc/group to Bright's LDAP? The following steps should be done on the head node. 1. Install the ...
General: How do I upgrade Bright from SLES11sp2 to SLES11sp3?
Answer: How do I upgrade Bright from SLES11sp2 to SLES11sp3? With the following recipe: Contents 1 How do I upgrade Bright from SLES11sp2 to SLES11sp3? 1.1 Introduction 1.2 Upgrading a software ...
Day-to-day Administration: How do I replace the user portal self-signed certificate?
Answer: How do I replace the user portal self-signed certificate? NOTE: This article only applies to versions of Bright prior to 7.0. For Bright 7.0 onward, please ...
Configuring: How do I configure my hardware RAID controller from an initialize script?
Answer: How do I set up a hardware RAID controller from an initialize script? An initialize script is used when custom commands need to be executed before ...
General: Why is rsh not working?
Answer: Why does RSH not work? Symptoms - rsh <hostname> <command> results in poll: protocol failure in circuit setup - /var/log/messages contains in.rshd message like “Could not allocate space ...
General: How do I change CMDaemon's port?
Answer: CMDaemon by default uses these pair of ports: 8080 and 8081 (for SSL). To change these ports to other ones, for example: 8084 and 8085 (SSL): Stop CMDaemon on the headnodes ...
Third Party Software: How can I use CUDA MPS with Bright?
Answer: Introduction CUDA MPS is a feature that allows multiple CUDA processes to share a single GPU context. A CUDA program runs in MPS mode, if the ...
Installing BCM: How do I install Bright on Virtual Box?
Answer: How do I install Bright on Virtual Box? Prerequisite: In order to use PXE booting, the VirtualBox Extension Pack should be installed. Create a Virtual Machine (VM) for ...
Power Management: Setup up custom power scripts for ProfitBricks
Answer: Custom Power Scripts for controlling ProfitBricks Instances Prerequisites To use dynamic scaling of clusters on ProfitBricks’ IaaS platform you have to install a head node in a ...
Installing BCM: How do I run Bright under MS Windows Server Hyper-V (Windows Server 2012R2)?
Answer: How do I run Bright under MS Windows Server Hyper-V (Windows Server 2012R2)? This article walks you through an install of Bright under Microsoft Hyper-V (Windows ...
OpenStack: How do I set up Cluster as a Service (CaaS) on Bright OpenStack 7.2?
Answer: Cluster as a Service on Bright OpenStack 7.2 [The following notes explain setting up a clusters as a service in Bright Cluster Manager. This ...
Cluster Monitoring: How can I monitor a CoolIT rack with Bright?
Answer: How can I monitor a CoolIT rack with Bright? CoolIT is a vendor of water-cooled racks that have sensors to monitor the rack. CoolIT racks can ...
Third Party Software: How do I use ScaleMP on Bright?
Answer: How can I run ScaleMP on Bright? This guide describes how to use ScaleMP’s vSMP for Cloud product to create virtual SMP nodes in a cluster. Installing ...
OpenStack: How do I set up Cluster as a Service (CaaS) on Bright OpenStack 7.1?
Answer: Cluster as a Service on Bright OpenStack 7.1 [The following notes explain setting up a clusters as a service in Bright Cluster Manager. This means that ...
Configuring: What is cm-register-node, and how can I use it?
Answer: What is cm-register-node, and how can I use it? (was: How can I add an SGI UV node to an existing Bright Cluster?) Written in catechismic ...

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