Showing posts from 2021

My first days at Huawei

I joined Huawei couple of weeks ago as OpenSource Operation expert for Europe. I would like to share my first feeling. Warm welcome I was really impressed during the hiring process about the availability and friendly discussions we had with all people I had the chance to meet. It's confirmed when I joined: I received a very warm welcome, very positive mood. This first day I had a meeting with my bosses QinYao and Bryan. They took the time to introduce the overall strategy and key objectives. It was very helpful and I was able to start my ramp up the first evening ;) In the meantime, Pauline (HR) introduced the company in France and HR details. To be honest, it took me couple of days to understand processes, trainings (and corresponding exams) and internal tools. However, the phone application is very convenient: we have almost everything on the phone app. Once tools installed, I was really pleased and impressed to see all warm welcome messages from my teamma

What's new in Apache Karaf Decanter 2.8.0?

Apache Karaf Decanter 2.8.0 has just been released. This release includes several fixes, improvements, and dependency updates. I encourage all Decanter users to update to 2.8.0 release ;) In this blog post, I will highlight some important changes and fixes we did in this release. Prometheus appender The Prometheus appender has been improved to expose more gauges. As reminder, the Decanter Prometheus appender is basically a servlet that expose Prometheus compliant data, that Prometheus instances can poll to get the latest updated metrics. Prometheus appender only looking for numeric data (coming from the Decanter collectors) to create and expose gauges. Unfortunately, in previous Decanter releases, Prometheus appender only looking for numeric value for "first level" properties. It means if a collected data property value was a Map , no inner data was considered by Prometheus appender, even if inner values were numeric. That's the first improvem

What's new in Apache Karaf runtime 4.3.3?

Apache Karaf runtime 4.3.3 has been released. This release contains a bunch of fixes, dependency updates, and improvement. I will share some highlights in this release. You can download Apache Karaf runtime here: . The release notes are available here: . JDK17 support for build and runtime Karaf 4.3.3 now fully supports JDK17 both at build time and runtime. For JDK17 support, we did: new ASM version new JDK options at runtime new packages exported by Karaf Cleanly close SSH connection We identified an issue with the Karaf SSH connections. The SSH connections were not cleanly close, and we had to wait the timeout to close the socket. It means that we can have this state once the SSH client disconnects: $ netstat | grep 8101 tcp6 0 0 localhost:8101 localhost:47844 CLOSE_WAIT 4.3.3 fixes

Apache ActiveMQ 5.16.3 has been released

Apache ActiveMQ 5.16.3 has been released today. In this blog, I would like to highlights some changes we introduced in this release. Better Camel 3.x support and JMS2 dependency I've rewritten the Karaf features repository in ActiveMQ 5.16.3. Firt, the Karaf features doesn't contain inner repository anymore. The purpose is to let user pickup the version he wants at runtime. Concretely, it means that, in Karaf, ActiveMQ 5.16.3 can already use Spring 5 (fully Spring 5 support including in the ActiveMQ standalone distribution is already done on main branch for ActiveMQ 5.17.x). By the way, I will do similar improvement in Apache CXF and Apache Camel features repositories (removing inner repository to let users pick up at runtime), and Karaf will provides a spec features in a dedicated features repository. I also updated the range to support JMS 2.x dependency, instead of always forcing JMS 1.x. Even if ActiveMQ 5.16.3 doesn't really support JMS 2, you can already

What's new in Apache Karaf runtime 4.3.2 ?

Apache Karaf runtime 4.3.2 has been released and available on . You can have take a look on the Release Notes . Let's take a quick tour on this new Karaf release. Support R7 configutation factory and fix on json check Karaf 4.3.x introduced both suppport of OSGi Spec R7 and json configuration support (in addition of the "regular" cfg/properties format). We identify an issue in the configuration json format: when the json contains an array, then it was always considered as updated. For instance, the following configuration: { "foo": [ "bar" ] } was considered as always updated. We can see in the log: 2021-05-07T23:01:45,924 | INFO | fileinstall-/[...]/karaf/etc | JsonConfigInstaller | 25 - org.apache.karaf.config.core - 4.3.1 | Updating configuration from my.config.json 2021-05-07T23:03:45,924 | INFO | fileinstall-/[...]/karaf/etc | JsonConfigInstaller | 25 -

What's new in Apache ActiveMQ 5.16.2 ?

Apache ActiveMQ 5.15.15 and 5.16.2 has been released. 5.15.15 is the last planned one on the 5.15.x branch, and contains only bug fixes. If you use ActiveMQ 5.15.x, you should upgrade to 5.16.x. Now, we are focusing on 5.16.x and coming 5.17.x (see later in this blog). ActiveMQ 5.16.2 brings important fixes and improvements. Let's take a quick tour ;) Fix on failover priorityBackup When you have brokers located on different networks, failver priortyBackup allows you to specify a preference to "local" broker. For instance, you can use a broker URL like this: failover:(tcp://local:61616,tcp://remote:61616)?randomize=false&priorityBackup=true With this URL, client will try to connect to tcp://local:61616 and stay connected there. The client will connect to remote only if local is not there. However, client will constantly try to reconnect to local . Once the client can do it (when local is back), he will automatically reconnect. By default, the first U

What's new in Apache Karaf 4.3.1 ?

Apache Karaf 4.3.1 has just been released. It's now available on . It contains the same features as Apache Karaf 4.2.11, you can find on . Of course, Karaf 4.3.1 contains some specific fixes and improvements. Updated system packages (for OSGi R7) Since OSGi R7, the java.* packages should be exported by the framework (aka system packages). As Karaf 4.3.x is based on OSGi R7, it should do it. Karaf uses configuration file to list the packages exported by itself. Regarding the packages provided by the JDK, Karaf use etc/ to export the packages depending of the JDK version (aka the execution environment). Karaf 4.3.1 has been updated to cleanly export java.* packages, and it has been done by adding these packages in etc/ configuration file. Features JSON format Karaf Features is the main provisioning extension for Apache Karaf. Basic

What's new in Apache Karaf 4.2.11 ?

Even if Apache Karaf 4.2.11 is a "minor" version on the Karaf 4.2.x series, it brings some interesting small stuff ;) Karaf BoM Like Apache Karaf 4.3.0, Karaf 4.2.11 now provides a Bill Of Material (BoM) siplifying the management of Karaf dependencies version. All Karaf examples now use the BoM. In your project, you can use the Karaf BoM like this: <dependencyManagement> <dependencies> <dependency> <groupId>org.apache.karaf</groupId> <artifactId>karaf-bom</artifactId> <version>4.2.11</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> The BoM provides all Karaf dependencies. It means you can use directly the Karaf dependencies like this: <dependency> <groupId>o

What's new in Apache Karaf Decanter 2.7.0 ?

Apache Karaf Decanter 2.7.0 release is currently on vote. I'm a little bit anticipating to the release to do some highlights about what's coming ;) Karaf Decanter 2.7.0 is an important milestone as it brings new features, especially around big data and cloud. HDFS and S3 appenders Decanter 2.7.0 brings two new appenders: HDFS and S3 appenders. The HDFS appender is able to store the collected data on HDFS (using CSV format by default). Similary, S3 appender store the collected data as an object into a S3 bucket. Let's illustrate this with a simple use case using S3 appender. First, let's create a S3 bucket on AWS: So, now we have our decanter-test S3 bucket ready. Let's start a Karaf instance with Decanter S3 appender enabled: Then, we configure S3 appender in etc/org.apache.karaf.decanter.appender.s3.cfg : ############################### # Decanter Appender S3 Configuration ############################### # AWS credentials accessKeyId=... secr

Complete metrics collections and analytics with Apache Karaf Decanter, Apache Kafka and Apache Druid

In this blog post, I will show how to extend the Karaf Decanter as log and metrics collection with storage and analytic powered by Apache Druid. The idea is to collect machine metrics (using Decanter OSHI collector for instance), send to a Kafka broker and aggregate and analyze the metrics on Druid. Apache Kafka We can ingest data in Apache Druid using several channels (in streaming mode or batch mode). For this blog post, I will use streaming mode with Apache Kafka. For the purpose of the blog, I will simply start a zookeeper: $ bin/ config/ and kafka 2.6.1 broker: $ bin/ config/ ... [2021-01-19 14:57:26,528] INFO [KafkaServer id=0] started (kafka.server.KafkaServer) I'm create a decanter topic where we gonna send the metrics: $ bin/ --bootstrap-server localhost:9092 --create --topic decanter --partitions 2 $ bin/ --bootstrap-server localhost:9092 -