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Red Hat XML language server becomes LemMinX, bringing new release and updated VS Code XML extension

By David Kwon March 27, 2020March 26, 2020

A new era has begun for Red Hat’s XML language server, which was migrated to the Eclipse Foundation under a new project name: Eclipse LemMinX (a reference to the Lemmings video game). The Eclipse LemMinX project is arguably the most feature-rich XML language server available. Its migration opens more doors for future development and utilization. In addition, shortly after its migration, the Eclipse LemMinX project and Red Hat also released updates: Eclipse LemMinX version 0.11.1 and the Red Hat VS Code XML extension.

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Static analysis in GCC 10

By David Malcolm March 26, 2020March 25, 2020

I work at Red Hat on GCC, the GNU Compiler Collection. For the next major release of GCC, GCC 10, I’ve been implementing a new -fanalyzer option: A static analysis pass to identify various problems at compile-time, rather than at runtime.

My thinking here is that it’s best to catch problems as early as possible as the code is written, using the compiler the code is written in as part of the compile-edit-debug cycle, rather than having static analysis as an extra tool “on the side” (perhaps proprietary). Hence, it seems worthwhile to have a static analyzer built into the compiler that can see exactly the same code as the compiler sees—because it is the compiler.

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Low-code microservices orchestration with Syndesis

By Pasquale Congiusti March 25, 2020March 23, 2020

Recently I wrote about decoupling infrastructure code from microservices. I found that Apache Camel and Debezium provided the middleware I needed for that project, with minimal coding on my end. After my successful experiment, I wondered if it would be possible to orchestrate two or more similarly decoupled microservices into a new service–and could I do it without writing any code at all? I decided to find out.

This article is a quick dive into orchestrating microservices without writing any code. We will use Syndesis (an open source integration platform) as our orchestration platform. Note that the examples assume that you are familiar with Debezium and Kafka.

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Red Hat Universal Base Images for Docker users

By Fernando Lozano March 24, 2020March 20, 2020

Red Hat Universal Base Images (UBIs) allow developers using Docker on Windows and Mac platforms to tap into the benefits of the large Red Hat ecosystem. This article demonstrates how to use Red Hat Universal Base Images with Docker from a non-Red Hat system, such as a Windows or Mac workstation.

Red Hat Enterprise Linux and Docker

When Red Hat Enterprise Linux (RHEL) 8 was released almost a year ago, and it came with lots of new features related to containers. The biggest ones were the new container tools (Podman, Buildah, and skopeo) and the new Red Hat Universal Base Images. There was also confusion because RHEL 8 dropped support for the Docker toolset. Some developers thought that they could not work with Docker anymore, and had to either migrate to a Red Hat-ecosystem Linux system such as CentOS or stay away from Red Hat customers.

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Ceph storage monitoring with Zabbix

By Alessandro Silva March 23, 2020March 20, 2020

Storage prices are decreasing, while business demands are growing, and companies are storing more data than ever before. Following this growth pattern, demand grows for monitoring and data protection involving software-defined storage. Downtimes have a high cost that can directly impact business continuity and cause irreversible damage to organizations. Aftereffects include loss of assets and information; interruption of services and operations; law, regulation, or contract violations; along with the financial impacts from losing customers and damaging a company’s reputation.

Gartner estimates that a minute of downtime costs enterprise organizations $5,600, and an hour costs over $300,000.

On the other hand, in a DevOps context, it’s essential to think about continuous monitoring, which is a proactive approach to monitoring throughout the full application’s life cycle and that of its components. This approach helps identify the root cause of possible problems and then quickly and proactively prevent performance issues or future outages. In this article, you will learn how to implement Ceph storage monitoring using the enterprise open source tool Zabbix.

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Kogito 0.8.0 features online editors and cloud-native business automation

By Karina Varela March 20, 2020March 19, 2020

Kogito is a cloud-native business automation solution that offers a powerful, developer-friendly experience. Based on production-tested open source projects Drools and jBPM, Kogito has business rules and processes down to a science. Kogito also aligns with popular lightweight runtimes such as Quarkus and Spring Boot to support developers building business-driven applications.

This article is an overview of the new enhancements for Kogito 0.8.0, which was released on March 10, 2020.

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Testing memory-based horizontal pod autoscaling on OpenShift

By Mohammad Ahmad March 19, 2020March 16, 2020

Red Hat OpenShift offers horizontal pod autoscaling (HPA) primarily for CPUs, but it can also perform memory-based HPA, which is useful for applications that are more memory-intensive than CPU-intensive. In this article, I demonstrate how to use OpenShift’s memory-based horizontal pod autoscaling feature (tech preview) to autoscale your pods if the demands on memory increase. The test performed in this article might not necessarily reflect a real application. The tests only aim to demonstrate memory-based HPA in the simplest way possible.

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Cross-language link-time optimization using Red Hat Developer Tools

By Josh Stone March 18, 2020March 16, 2020

Several months ago, the LLVM project blog published an article, Closing the gap: cross-language LTO between Rust and C/C++. In it, they explained that link-time optimization can improve performance by optimizing throughout the whole program, such as inlining function calls between different objects. Since Rust and Clang both use LLVM for code generation, we can even achieve this benefit across different programming languages.

In Red Hat Developer Tools, we have the Rust and LLVM Toolsets, which can easily be used together for cross-language link-time optimization (LTO), so let’s try it out.

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How to use the new Kafka Client API for Kafka-specific message properties in Open Liberty 20.0.0.3

By Tom Jennings March 17, 2020March 13, 2020

In Open Liberty 20.0.0.3, you can now access Kafka-specific properties such as the message key and message headers, rather than just the message payload, as was the case with the basic MicroProfile Reactive Messaging Message API. Also, you can now set the SameSite attribute in the session cookie, the LTPA, and JWT cookies as well as in application-defined cookies.

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Extending gdbserver to support an strace client

By Stan Cox March 16, 2020March 13, 2020

The strace command traces system calls and signals, deciding them and their corresponding arguments into a symbolic form. A frequent debugging request from developers is the ability to allow strace to trace system calls for a program that is also being debugged by GDB, like this:

% gdb --args test-program
(gdb) b main
Breakpoint 1 at 0x40128e: file test-program.c, line 22.
(gdb) run
Starting program: test-program
Breakpoint 1, main (argc=3, argv=0x7fffffffdb98) at test-program.c:22
22 int thread_count = 2;
(gdb)

In another terminal window, we invoke strace on the same process GDB is debugging:

% strace -p $(pgrep -f test-program)
strace: attach: ptrace(PTRACE_SEIZE, 27882): Operation not permitted

The culprit here is that the ptrace system call, which is used by both GDB and strace to control the execution of programs, and does not allow both strace and GDB to control the same process.

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Red Hat Enterprise Linux and Docker