Enabling the use of the GPU on your Mac M1 with the tensorflow-metal plugin can be challenging because there is a lot of conflicting documentation and older forum questions and replies. I’ve written this article for a Mac M1 running on macOS Sequoia 15.1.1. As of December 2024, you should pair Python 3.11 with TensorFlow … Mac: tensorflow-metal pip module on M1 chip for GPU support
Github Actions provide the ability to define a build workflow, and for projects that are building an OCI (Docker) image, there are custom actions available for running the Trivy container security scanner. In this article, I will show you how to modify your GitHub Action to run the Trivy security scanner against your image, and … Github: security scanning built into GitHub Actions image build
GitLab Pipelines provide the ability to define a build workflow, and for projects that are building an OCI (Docker) image, there is a convenient method for doing container security scanning as part of the build process. Include Container Scanning As described in the official documentation, add the following include to your .gitlab-ci.yml pipeline definition. include: … GitLab: security scanning built into GitLab Pipelines image build
Docker can build multi-platform images that use a manifest index (fat manifest list) by using the Docker buildx command with backing containerd runtime and QEMU for cross-platform emulation. Using a manifest index for multi-platform images simplifies application level orchestration by using the same name and version for all architectures. For example: # same image name … Docker: building multi-platform images that use fat manifest list/index
If you need to create a new git branch for your project, one that is completely fresh and with no previous history or commits, that can be done using the “orphan” flag of the switch command if you are using git 2.23+. Fresh branch using ‘git switch’ # create fresh branch git switch –orphan my-fresh-branch … Git: create a new empty branch with no history or commits
The forked workflow is popularized by the Open Source community where your personal contributions are made by having your own personal fork of a repository and pushing a GitLab Merge Request to a central repository. A GitLab Merge Request can be submitted from the web UI by clicking on “Merge requests” and manually selecting the … GitLab: generating URL that can be used for Merge Request from fork to upstream
GCP build triggers can easily handle Continuous Deployment (CD) when the source code is homed in a Google Cloud Source repository. But even if the system of record for your source is a remote GitHub repository, these same type of push and tag events can be consumed if you configure a connection and repository link. … GCP: Cloud Run with build trigger coming from remote GitHub repository
Flask is a suitable web server during development, but if you are going to deploy in a production environment, a Python WSGI server such as Gunicorn should be used. This also applies to Python Flask apps deployed to GCP Cloud Run. Gunicorn is necessary to tune the worker and thread count of each instance to … GCP: deploying a Python WSGI Gunicorn app on Cloud Run
Github Actions provide the ability to define a build workflow based on Github repository events. The workflow steps are defined as yaml and can be triggered by various events, including a code push, branch, or tagging in the repository. In this article I will detail the steps of creating a statically-linked GoLang binary that when … Github: automated build and publish of containerized GoLang app with Github Actions
A Gradle Exec task will only run the last ‘commandLine’ defined inside its block. Putting multiple entries inside its block will not run multiple commands. As an example, if you run the following Gradle task. task willOnlyRunLast(type: Exec) { commandLine “echo”, “first” commandLine “echo”, “second” commandLine “echo”, “last” } The task above will only echo … Gradle: running more than one command in an Exec task
Github Actions provide the ability to define a build workflow directly in Github. The workflow steps are defined as yaml and can be triggered by various events, including a code push, branch, or tagging in the repository. In this article I will detail the steps of creating a simple Spring Boot web application that when … Github: automated Github release for Spring Boot jar using Github Actions
Github Actions provide the ability to define a build workflow directly in Github. The workflow steps are defined as yaml and can be triggered by various events, including a code push, branch, or tagging in the repository. In this article I will detail the steps of creating a simple Spring Boot web application that when … Github: automated build and publish of containerized Spring Boot app using GitHub Actions
The GitHub “Release” page for a repository can provide your consumers a convenient way to download a binary version of your software as well as track the latest changes and enhancements. In this article, I will show how to invoke a local release process for a Java Spring Boot jar built with Gradle. A new … Github: locally invoked release process for a Gradle built Java Spring Boot project
The GitHub “Release” page for a repository can provide your consumers a convenient way to download a binary version of your software as well as track the latest changes and enhancements. In this article, I will show how to invoke a local release process for a Go language binary. A new Github release will be … Github: locally invoked release process for a Go binary
The Go language with its simplicity, concurrency support, rich package ecosystem, and ability to compile down to a single binary is an attractive solution for writing services on Ubuntu. However, the Go language does not natively provide a reliable way to daemonize itself. In this article I will describe how to take a couple of simple Go language programs … GoLang: Running a Go binary as a systemd service on Ubuntu 22.04
Update Sept 2024: changed the page parsed for latest version, validated installation of go1.23.1 on Ubuntu22.04 The Go programming language consistently ranks as one of the most popular languages in developer surveys. In fact, Kubernetes as well as most of the CNF projects are written in Go. And it compiles down to machine code, which … GoLang: Installing the Go Programming language on Ubuntu 22.04
If you need to enable JDWP debugging of your Spring Boot web application in an IDE such as Eclipse, you can append the ‘debug-jvm’ flag to the gradle task, and then from your IDE enable a remote debugging connection to port 5005. I will walk you through a full example, but very quickly, here is … Gradle: interactive JDWP debugging of bootRun gradle task in Eclipse IDE
The Spring Security framework provides a robust and customizable framework for authentication and authorization for Spring based applications. Using Spring Security, a Spring developer can add OIDC authentication and OAuth2 protection of resources by including the libraries in the build, configuring the Spring application.yml, and enabling various component configurations and annotations. In this article, I … Java: Spring Security OAuth2/OIDC protecting Client App and Resource Server
See the newer version of this article, “Installing the Go Programming language on Ubuntu 22.04“. The Go programming language consistently ranks as one of the most popular languages in developer surveys. In fact, Kubernetes as well as most of the CNF projects are written in Go. And it compiles down to machine code, which has … GoLang: Installing the Go Programming language on Ubuntu 20.04
The Microsoft .NET SDK is an open-source development platform for developing applications across multiple architectures and operating systems. In this article, I will show you how to install the .NET SDK on Ubuntu 20.04 and then create/compile/run a simple web application. Ubuntu 22 will have the dotnet-sdk available in the default Ubuntu apt repositories, but … Ubuntu: Installing .NET SDK 6 on Ubuntu 20.04
If the gradle wrapper for your project is broken, you can reinstall it with the “gradle wrapper” command. For example, below is a common error if you have cloned a git repository where the owner has not pushed all the necessary gradle components into the repo. $ ./gradlew –info Error: Could not find or load … Gradle: fixing the gradle wrapper for a Java project
Spring Boot excels as a framework that makes it convenient to expose a set of REST based services. But once an application is developed, it is so trivial to create a new resource or modify a method signature that it becomes difficult to keep the documentation up-to-date so that clients can properly consume the REST … Java: Spring Boot REST service with OpenAPI/Swagger documentation
While working on your Spring Boot web application locally, gradle provides the ‘bootRun’ for a quick development lifecycle and ‘bootJar’ for packaging all the dependencies as a single jar deliverable. But for most applications these days, you will need this packaged into an OCI compatible (i.e. Docker) image for its ultimate deployment to an orchestrator … Java: Creating Docker image for Spring Boot web app using gradle
If you have enabled Actuator in your Spring Boot application, you can add custom status metrics to the standard health check at ‘/actuator/health’. Additionally, your custom health indicator can signal an UP/DOWN status that propagates to the main level status and can then be used by an external monitoring/alerting solutions or as an indicator to … Java: adding custom health indicator to Spring Boot Actuator
If you have enabled Actuator and the ‘micrometer-registry-prometheus’ dependency in your Spring Boot application, then you will have a new ‘/actuator/prometheus’ web endpoint that returns general information about threads, garbage collection, disk, and memory. This information is delivered in standard prometheus formatting as plaintext, with one metric per line. This is exactly the type of … Java: Adding custom metrics to Spring Boot Micrometer Prometheus endpoint
If you have enabled Actuator in your Spring Boot application, then in addition to the standard endpoints for health and metrics, you can also add your own endpoint to expose custom metrics. In its simplest form, this is done by adding a @Component and @Endpoint annotation to a custom class that returns the metrics, and … Java: exposing a custom Actuator endpoint with Spring Boot
Since the announcement of CVE-2022-24765, newer git clients from the Ubuntu security and archive package repositories may throw errors about “unsafe repository … is owned by someone else” if directories are not owned by your personal user id. First, try to resolve the issue by running the command suggested in the error message. # attempt … Ubuntu: install latest git client from PPA to fix ‘unsafe repository’ errors
If your VSCode terminal does not contain the directory location you need in its PATH, you can add it locally to the VSCode settings and it will remain persistent every time you open the IDE. From the main menu, go to File > Preferences > Settings, and click on the “Open Settings (JSON)” icon shown … VSCode: Add a directory to the terminal PATH
Most Git providers-as-a-service have administrative functions for renaming, moving, and even importing repositories from other provider URLs. However, it is also valid to perform these operations manually by repointing the origin and then pushing all commits and tags to a new repository URL. # make sure all changes are pushed first git push # check … Git: cloning a git repository from one location to another
My previous article on multi-stage builds to create Docker images for Go laid the foundation for using an intermediate image as the builder your Go binary. However, this example was intentionally simplistic and did not address package and dependency management. Since the release of Go 1.11, the standard tooling has natively supported the concept of … GoLang: Go modules for package management during a multi-stage Docker build
The Go programming language is a natural fit for containers because it can compile down to a single statically-linked binary. And if you place that single executable on top of scratch, a distroless image, or a small image like alpine, your final image has a minimal footprint which is great for consumption and reuse. But the … GoLang: Using multi-stage builds to create clean Docker images
The Go programming language has gotten considerable momentum, and the fact that it compiles down to a single statically linked binary has made it popular in containers, where a single executable binary fits the execution model perfectly. This article will detail installation on Ubuntu with the standard hello world validation.
If you accidentally pushed a secret or password into a git repository, the BFG Repo-Clean utility is a convenient option for removing all traces of the secret from the entire git commit history. It is also possible to use ‘git-filter-branch‘, but I find BFG more convenient and faster.
Especially with private git repositories that may be self-signed or have private CA, you may get the following error from the git client after a certificate has been updated: fatal: unable to access ‘https://git.mycompany.com/myuser/myrepo.git/’: server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none This means that the git client cannot verify the integrity of the certificate … Git: client error, server certificate verification failed
With so many critical projects available in public git repositories like github, it is important to be able to contribute back additional functionality, tests, and documentation to the original project. While most projects do not allow a direct commit, contributions can be made by submitting a pull request to original repository. Often times, repositories are … Git: Contributing to a git project using a pull request
With the modern mantra of “everything is code”, operations and network teams must come to terms with how they want to work with source control in a team environment. Imagine a repository that contains configuration templates and scripts for maintaining an application or appliance. For a multi-member operations team who shares the responsibility for this … Git: Sharing a single git controlled folder among a group under Linux
In a production datacenter it would not be uncommon for internet access to be limited to domains whitelisted on a web proxy such as Squid. If this is the case, and you are using pip to install packages, then you will need to: Have your Squid administrators whitelist pypi.python.org Add the “–proxy” switch when invoking … Python: Using pip with a squid proxy
If you are in the vim camp, you may not appreciate git forcing you to emacs when committing. First, let me remind you how to save and then quit for emacs if you do get forced into that editor. CTRL-X CTRL-S (to save) then CTRL-X CTRL-C (to quit) And if you would like to avoid … Git: Forcing git to use vim for commit messages
The recommended way to run a Gradle build is with the Gradle wrapper. You can check the current version of your wrapper with the command: $ ./gradlew –version If you are working with an older Gradle version and want to upgrade to take advantage of new features, you can use the ‘wrapper’ task specifying the … Gradle: Upgrading the Gradle wrapper version
In order to communicate with MongoDB using its default TCP protocol on port 27017, you will need a MongoDB client. There are many language bindings available, but in this article we’ll focus on the client available from the “mongodb-org-shell” Debian package.