We have an application which used JBoss 4.2.3.GA and we are migrating it to WildFly 8.2. In the old implementation, the JMX monitoring was done using twiddle. Since twiddle doesn't exist in WildFly, we are using the JBoss CLI for JMX monitoring.
Is it the right approach to use the JBoss CLI for JMX monitoring? Are there any command line tools similar to twiddle which can be used for JMX monitoring in WildFly?
One option to get something similar would be to simply query the JMX MBeans programmatically yourself. The advantage here is that your solution can be reused without depending on things like Twiddle which may be discontinued and also are compatible with other app servers.
Here is an example using Groovy to query an MBean in Tomcat and here is an example using Java to query an MBean in ActiveMQ.
If you choose to go with Groovy, you should be aware that there is a way to use Groovy (or Javascript or Python) to wrap the CLI and have more of a control flow. The CLI is great for simple declarative things, but lacks the versatility of a proper scripting language.
If you want to use pure CLI, then that's fine too, but I would suggest you create files which you can then call through bash e.g.:
$JBOSS_HOME/bin/jboss-cli.sh -c --file="my-jvm-monitoring.cli"
You might find this CLI model reference useful and also this blog about monitoring WildFly with the CLI
Related
Having skimmed the Google Cloud Dataflow documentation, my impression is that worker VMs run a specific predefined Python 2.7 environment without any option to change that. Is it possible to provide a custom VM image for the workers (built with libraries, external commands that the particular application needs). Is it possible to run Python 3 on Gcloud Dataflow?
2021 Update
As of today, the answer to both of this questions is YES.
Python 3 is supported on Dataflow.
Custom container images are supported on Dataflow, see this SO answer, and this docs page.
Is it possible to provide a custom VM image for the workers (built with libraries, external commands that the particular application needs). Is it possible to run Python 3 on Gcloud Dataflow?
No and no to both questions. You're able to configure Compute Engine instance machine type and disk size for a Dataflow job, but you're not able to configure things like installed applications. Currently, Apache Beam does not support Python 3.x.
References:
https://cloud.google.com/dataflow/pipelines/specifying-exec-params
https://issues.apache.org/jira/browse/BEAM-1251
https://beam.apache.org/get-started/quickstart-py/
Python 3 support in to Apache Beam status:
https://beam.apache.org/roadmap/python-sdk/#python-3-support
You cannot provide a custom VM image for the workers, but you can provide a setup.py file to run custom commands and install libraries.
You can find more info about the setup.py file here:
https://beam.apache.org/documentation/sdks/python-pipeline-dependencies/
Custom containers are now supported on Dataflow.
I'm working in an Erlang environment. I'm looking to establish a dependency manager so that our build server can publish binaries for reuse instead of using source code dependencies. The Hexpm GitHub project implies that it is possible to run it outside of the hex.pm website, but I don't see any instructions for doing so. Specifically, I would like my build server to be able to publish packages either directly (via the filesystem) or via rebar3, and for subsequent rebar3 builds to be able to use those published packages
Is it possible to run Hex on my own server?
If so, where would I find some documentation on how to set it up (or provide the instructions directly)?
If you look at https://github.com/hexpm/hex_web there are instructions in the README.md for both installing and running it. It's a phoenix application, so it should all be relatively familiar ground if you've looked at the phoenix framework before.
As for getting rebar3 to work with your installation, there is documentation here as to the config values to use for setting the URLs to use for hex packages: http://www.rebar3.org/docs/hex-package-management.
HTH.
I am looking for a JMX client that can invoke an mbean operation from a batch file. Actually a cron job should invoke an operation via JMX in Weblogic server.
Unfortunately VisualVM does not work in batch mode (or does it?).
So, what do you use as JmX batch client?
Has anybody tried http://wiki.cyclopsgroup.org/jmxterm
? I could not find out what license it's under
What is the best or most commonly used JMX Console / Client
Thx, Juergen
I faced into the same problem and that's why I wrote simple utility to help me update JMX properties on several machines by running one command. Also, It makes possibility to get their values by running tool by cron. I wrote post about that http://simpletoad.blogspot.com/2013/06/jmx-batch-updates.html. Plz, share your opinion. There is also code available on github, don't hesitate to fork me
I am following this tutorial on Grails and Cloudbees And it says :
"to use CloudBees databases locally from your application, you first need to add the CloudBees SDK's appserver.jar file to your grails classpath"
Does anyone know what is this appserver.jar? Where can I find it?
Yes, as mentioned in the comment - you can get that jar file from the SDK you download.
However, it is perfectly find (and possibly better) to use the mysql driver directly as mentioned.
When running on cloudbees, you can bind your app to a database - so that at runtime the right database is injected - using the bees db:bind SDK command.
I have seen this question about deploying to WebSphere using the WAS ant tasks.
Is there a simpler way to do this? In the past I have deployed to Tomcat by dropping a war file into a directory. I was hoping there would be a similar mechanism for WebSphere that doesn't involve calling the IBM libraries or rely on RAD to be installed on your workstation.
Just a hint: if you activate "Log command assistance commands" in System Administration / Console preferences, you will get a logfile in the server log directory that contains the jython scripts for all actions you did on the console. So you can just deploy your stuff per console the first time, and then grab the commands for later and feed them into wsadmin.bat -lang jython "thecommandscomehere" for the next deployment.
There is the concept of WebSphere Rapid Deployment. It's supposed to be the same experience as what you describe for Tomcat.
One way to do it could be using Jython or jacl scripts. See those samples at IBM site.
[EDIT] Especially the wsadminlib.py.zip download near the bottom of the page contains a huge set of examples and helper functions to get you started.
WAS does provide a client jar containing some custom ant tasks. However they seem to be extremely bugy and dont work with remote servers.
IBM ANT TASK Javadoc
Netbeans also has support for was 6 and 6.1 but this again is still quite buggy, however it can be useful for generating some the bindings files etc.