Hawkular Metrics Openshift Containers
by Matt Wringe
I have a new subproject in Hawkular Metrics which sets up creating
components for Openshift/Fabric8
(https://github.com/hawkular/hawkular-metrics/pull/200).
There are 3 main parts
Cassandra: creates a custom seed provider to support
ReplicationControllers in Kubernetes, creates a folder/zip archive which
can be used to generate a Docker image. It may make sense to move the
Cassandra parts out to a separate project.
Hawkular Metrics: creates a folder/zip archive which can be used to
generate a Docker image
Kubernetes: pulls everything together into a single kubernetes
application. Can be used to deploy an application zip into fabric8 (via
drag and drop in the web console or via the maven plugin) or deploy all
the components into Openshift via the kubernetes.json configuration file.
The docker images are not created and deployed to a docker registry as
part of the build, it will just create a folder where you can run the
docker build from. None of the maven docker plugins I looked at seemed
to really work properly, so its still a manual process to do the build
(and push to a registry). Its something which needs to be improved.
The Cassandra service currently only supports adding new nodes to a
cluster and not removing them via the ReplicationController. This is due
to the replication factor being set to be 1 by default (which means when
a node is removed, so is the data it contained).
I believe the docker subproject of hawkular metrics is obsolete and can
be removed
(https://github.com/hawkular/hawkular-metrics/tree/master/docker), but
someone please correct me if I am wrong. It's scripts are referring to
the console which no longer exists as part of the project.
- Matt
11 months
Tenant Id - Not Part of URL
by Stefan Negrea
Hello Everybody,
I've been working on a PR for the upcoming Hawkular Metrics release that will remove the tenant id from the end-point URLs. The tenant id will be moved to either a header parameter or a query parameter. The query parameter is in place for cases (such as curl) where setting a header is not possible, difficult, or inconvenient.
Here is an example of the change:
Existing URL:
/{tenantId}/gauge/{metricId}/data
New URL:
/gauge/{metricId}/data
Tenant id set via:
1) header - tenantId
2) query parameter - tenantId
There are two exceptions to this rule, /tenants and /db/{tenantid}/series. The /tenants end-point will be changed into something different in the upcoming releases since it is mostly a management type API that does not belong in the same place with the regular metrics endpoint. And /db/{tenantid}/series end-point is needed in this exact format for compatibility with Influxdb compatible services.
Now, to the merits of this change. The tenant id is volatile, can change any time, and changes to it should be expected; but the rest of the URL is fixed. The second issue is that the tenant id is a security concern. So we were limited in design choices since a security concern was leaking as part of the URL.
So removing the tenant id from the URL will give us permanent & consistent addresses for resources (metrics and metric data points). And we will gain a lot of flexibility on the security side. In the future, users could authenticate with a user/pass combo and the backend would transform that into a tenant id to be used on the request. If the same user later decides to use a tenant id to pass along the request, the URL of the resources would not change. Another expectation is that tenant id is not sufficient, it is typically a combo of id + secret; so we would have resorted to a header or query param for the second piece of information (the secret).
This change will give us the flexibility to adjust the security model (the meaning of tenant ids and ways to validate them) without compromising the URL structure. This will help Hawkular Metrics as it gets integrated into more and more projects and products.
Here are the links to the JIRA and the PR for this change:
https://github.com/hawkular/hawkular-metrics/pull/202
https://issues.jboss.org/browse/HWKMETRICS-68
Thank you,
Stefan Negrea
Software Engineer
11 months
New and noteworthy in hawkular-parent 25
by Peter Palaga
Hi *,
hawkular-parent 25 brings the following:
* srcdeps-maven-plugin 0.0.5
* meets the promisses falsely done for 0.0.4:
* less console output
* built without tests
* wildfly-maven-plugin 1.1.0.Alpha4
I have sent PRs to all components repos.
Thanks,
Peter
_______________________________________________
hawkular-dev mailing list
hawkular-dev(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/hawkular-dev
11 months
Hawkular
by Daniel Glöckner
Hi,
we're using WildFly 10.1.0 and we need more monitoring ;)
I hope this is the right mailing list.
The target picture is
-InfluxDB as TSDB for archiving performance relevant measurements
-Grafana for creating and sharing dashboards
We'd like to use "standard" tools as much as possible. JMX is a mature
standard and we'd like to use it for publishing the metrics.
Using jmxtrans (https://github.com/jmxtrans/jmxtrans) we're able to get a
lot of details about JVM and parts of WildFly.
We're lacking visibility on
-connection pools
-thread pools
-EJBs (remoting)
-web services
How could hawkular help here? I guess hawkular plugs into metrics which
are (unfortunately) not available via JMX in WildFly?
Can hawkular publish via JMX? Or write to InfluxDB?
InfluxDB is not set into stone but is the preferred solution.
Kind regards,
Daniel
11 months
logging in java agents is not trivial in WildFly / EAP
by Mark Ambrose
>>> ... this means problems still need to be overcome when
>>> putting java agents in host controllers for EAP 7.0 domain mode.
>>> </tl;dr>
Is a solution to these problems for when putting java agents in host
controllers for EAP 7.0 domain mode known?
...
[Host Controller] 16:16:33,937 INFO [org.jboss.as.host.controller]
(Controller Boot Thread) WFLYHC0023: Starting server TestServer1a
16:16:33,968 INFO [org.jboss.as.process.Server:TestServer1a.status]
(ProcessController-threads - 3) WFLYPC0018: Starting process
'Server:TestServer1a'
[Server:TestServer1a] Could not load Logmanager
"org.jboss.logmanager.LogManager"
[Server:TestServer1a] java.lang.ClassNotFoundException:
org.jboss.logmanager.LogManager
[Server:TestServer1a] at
java.net.URLClassLoader.findClass(URLClassLoader.java:382)
...
Thanks,
Mark Ambrose
11 months, 3 weeks
