rhq-users January 2013

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18 participants
18 discussions

Metrics Migration Tool - Cassandra
by Stefan Negrea 14 Jan '13

14 Jan '13

Hello Everybody, With new Cassandra based metrics storage system, existing data will need to be migrated out of existing SQL storage to Cassandra. I put together a simple design document for the data migration tool that will be delivered with RHQ when the new metrics storage system is completed. My initial thoughts about the tool are: 1) Restartable migration process, this will be especially useful for users with large amounts of metrics. 2) Favour robustness over performance because this migration will be done only once. 3) Make the tool external to the product (not part of the installation), so user can do the migration ahead of the upgrade. Here is the full design document: https://docs.jboss.org/author/display/RHQ/Metrics+Data+Migration+-+Design Feedback is more than welcomed since this tool is still in the early planning stages. Thank you, Stefan Negrea Software Engineer

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removing a platform
by Elmar Knipp 10 Jan '13

10 Jan '13

Is there any documentation how to remove a platform with the web interface? I am not speaking about removing the agent software on the platform itself - that is clear and documented. I had some test machines in my configuration and want to get rid of them. Maybe I am blind but I could not find anything in the documentation nor in the web interface. Any hints are welcome. /E

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1. Re: Displaying any kind of resource content (Jay Shaughnessy)
by Boris Sander 08 Jan '13

08 Jan '13

Hi Jay, yes, this is the desired solution. I want to perform operations individually on each message in the queue and I want to display the messages inside the tree node of the queue. But the nature of a message queue is it's volatility, right? So if the message is consumed, the resource representing that message still exists and will not be discarded. I had a solution working in that way, I already had nice entries in the Dummy queue (see screenshot), but tons of alerts due to missing resources or a growing list of child resources :-) I found a workaround, but haven't implemented it yet since I thought there might be a more elegant solution: I could start a cyclic job in the parent resource (service) that is fetching each queue and deleting message resources that do not exist anymore. What is your opinion doing it that way? Your second solution, dealing with message ID parameter for operations on the queue level, is going into production next week. But be honest, this is not very user friendly, is it? I don't think this is a rare use case. So what should I do? Any idea is very appreciated. Thanks, Boris Am 08.01.2013 um 13:00 schrieb rhq-users-request(a)lists.fedorahosted.org: > Send rhq-users mailing list submissions to > rhq-users(a)lists.fedorahosted.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.fedorahosted.org/mailman/listinfo/rhq-users > or, via email, send a message with subject or body 'help' to > rhq-users-request(a)lists.fedorahosted.org > > You can reach the person managing the list at > rhq-users-owner(a)lists.fedorahosted.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of rhq-users digest..." > > > Today's Topics: > > 1. Re: Displaying any kind of resource content (Jay Shaughnessy) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 07 Jan 2013 09:27:25 -0500 > From: Jay Shaughnessy <jshaughn(a)redhat.com> > To: rhq-users(a)lists.fedorahosted.org > Subject: Re: Displaying any kind of resource content > Message-ID: <50EADB4D.7010803(a)redhat.com> > Content-Type: text/plain; charset=UTF-8; format=flowed > > > Can you mention why making the messages child resources was nt > successful? It seems like that is the aproach you would want, to be > able to inspect and operate on each message individually. Although, > given normal message delivery and the brief lifecycle of each message, > it would seem like there would be a lot of resource churn. > > Perhaps you could do it all as operations on the queue itself. An > operation that lists the current messages, including identifying ID > information. And further operations that operate on messages given the ids. > > On 1/5/2013 10:01 AM, John Mazzitelli wrote: >>> Are there any suggestions >>> how to expose resource specific content, or do I have to implement a >>> server side GUI extension? >> There is a lot of documentation around on writing custom agent plugins - I would start here and poke around to see if something helps: >> >> https://docs.jboss.org/author/display/RHQ/Plugin+Community >> >> There is no custom GUI extensions supportable in RHQ - there are custom server side plugins, but that isn't for the GUI and it doesn't sound like that is what you want. I think agent plugins should help you do most, if not all, that you want. >> >> ----- Original Message ----- >>> >>> >>> Hi! >>> >>> My name is Boris, I am currently working at EON Energy Trading in >>> Germany. We are currently using RHQ in order to monitor some >>> Servicemix and ActiveMQ instances. I am quite new to this tool, and >>> I was able to implement the first custom agent plugin using JMX. My >>> intention now is to display the content of the queues of ActiveMQ. >>> My first attempt, exposing the messages inside the queues as >>> resources itself, wasn't very successful. I want to perform some custom operations >>> on that content, like re-enqeuing, purging and deleting and so on. >>> >>> Many thanks for your help >>> Boris >>> >>> _______________________________________________ >>> rhq-users mailing list >>> rhq-users(a)lists.fedorahosted.org >>> https://lists.fedorahosted.org/mailman/listinfo/rhq-users >>> >> _______________________________________________ >> rhq-users mailing list >> rhq-users(a)lists.fedorahosted.org >> https://lists.fedorahosted.org/mailman/listinfo/rhq-users > > > > ------------------------------ > > _______________________________________________ > rhq-users mailing list > rhq-users(a)lists.fedorahosted.org > https://lists.fedorahosted.org/mailman/listinfo/rhq-users > > > End of rhq-users Digest, Vol 36, Issue 6 > ****************************************

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Displaying any kind of resource content
by Boris Sander 07 Jan '13

07 Jan '13

Hi! My name is Boris, I am currently working at EON Energy Trading in Germany. We are currently using RHQ in order to monitor some Servicemix and ActiveMQ instances. I am quite new to this tool, and I was able to implement the first custom agent plugin using JMX. My intention now is to display the content of the queues of ActiveMQ. My first attempt, exposing the messages inside the queues as resources itself, wasn't very successful. Are there any suggestions how to expose resource specific content, or do I have to implement a server side GUI extension? I want to perform some custom operations on that content, like re-enqeuing, purging and deleting and so on. Many thanks for your help Boris

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Re: Re: Is programatic install of bundles possible?
by Joe Gamache 04 Jan '13

04 Jan '13

Lukas - thanks, that helps a lot. Two more quick questions for you: 1. If I built my own plugin, do you know what license requirement I would need to have? 2. Since many of the links in that page are broken, is there a decent example of a server plugin available? Either a reference implementation or a simple one? thanks again, Joe Something like this could be achieved using a custom server plugin that you would have to write yourself [1]. This plugin would have to be installed on all the (independent) RHQ servers. The plugin would check the remote location for your new/updated bundles and then call the bundle subsystem on each particular RHQ server to deploy them. [1] https://docs.jboss.org/author/display/RHQ/Server+Plugin+Development

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Re: Is programatic install of bundles possible?
by Joe Gamache 03 Jan '13

03 Jan '13

> > >> Does anyone know if it is possible to install bundles "remotely". >> That is, if I have an application at another site (so it has a RHQ >> Server managing several nodes with RHQ Agents running on them), can >> I install something like an ant bundle that will check with my >> centralized website (via rhq:url or rhq:url-archive - I know how to >> do this part), where what is downloaded are new and/or modified ant >> bundles? These would need to be installed without operator >> intervention. >> Is this possible? > > I don't quite understand what it is you are asking. Can you give an example or more details of this use case? It seems like you want to install an ant bundle on a remote machine without having to go through the RHQ server-agent architecture to do so? Need more info. Yes, it is hard for me to describe what I am seeking - sorry! I am focusing on the "Provisioning" capability of RHQ. To this end, consider that I might have 3 installations, each at a different client site, each of which knows nothing about one another. Nor do I have the capability to access the main RHQ Server installed at each site. How would a general model for unknown future installs/updates occur in such a deployment? [Further, the number of sites really needs to scale to the order of 1000's]. An idea I had would be to create a bundle that executes periodically on the server node itself and checks with a centralized "update site" created for this purpose. This particular bundle would be installed with the initial installation of the system. When it found something new, what would it need to do? I am looking for help here, but my guess was that it might find a new "bundle" that would need to be installed. This new bundle might be an update to existing software deployed at that site, or it might be a new feature/subsystem to be installed there for the first time. If this is the way to go, how would that bundle be installed via the other bundle? If this is not the way to go, then what is the proper way to achieve this? thanks again for anyone's help!

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Is programatic install of bundles possible?
by Joe Gamache 02 Jan '13

02 Jan '13

Does anyone know if it is possible to install bundles "remotely". That is, if I have an application at another site (so it has a RHQ Server managing several nodes with RHQ Agents running on them), can I install something like an ant bundle that will check with my centralized website (via rhq:url or rhq:url-archive - I know how to do this part), where what is downloaded are new and/or modified ant bundles? These would need to be installed without operator intervention. Is this possible? [cid:image002.png@01CDB859.CFB0C100] Joe Gamache Senior Developer Black Duck Burlington, MA USA T: 781.425.4446 www.blackducksoftware.com<http://www.blackducksoftware.com/>

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Output from deploying a bundle?
by Joe Gamache 02 Jan '13

02 Jan '13

Sorry if this is too much of a "newbie" question, but I can't find the answer elsewhere. The archives are not searchable, so I scanned back the past year in case anyone else had asked - to no avail. I am running the "provisioner" manually via "rhq-ant" and have a bundle that works properly and in-line with my expectations. Between the "rhq-audit" statements and the "echo" ones, there is no shortage of information when my bundle runs. However, when I deploy the same bundle from within RHQ to a remote node, I have no idea where this output goes, nor how to see it. Can anyone help? thanks! [cid:image002.png@01CDB859.CFB0C100] Joe Gamache Senior Developer Black Duck Burlington, MA USA T: 781.425.4446 www.blackducksoftware.com<http://www.blackducksoftware.com/>

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rhq-users January 2013