key DevOps principle for automation, consistency and reliability 4 What is GitOps? An developer-centric approach to Continuous Delivery and infrastructure operation Treat everything as code Git is of truth Operations through Git workflows 5 GitOps Workflow a declarative approach to application delivery A A A What you want (desired state) What you have (current state) CD Why GitOps? tools and Git workflows from application development teams Standard Workflow Multi-cluster consistency 7 Source Git Repository Image Registry CI The GitOps Application Delivery Model 8 Source

configuration is guaranteed by a set of facts instead of by a set of instructions. With your application’s declarations versioned in Git, you have a single source of truth. Your apps can then be easily driven. This trivializes rollbacks; where you can use a `Git revert` to go back to your previous application state. With Git’s excellent security guarantees, you can also use your SSH key to sign commits microservice repo and in that repo, you bundle your application code along with deployment YAML manifest files or a Helm chart that define how your application will run in your cluster. When you push that

3.9 私有 Debian 仓库 您可以使用 reprepro 软件包搭建私有 Debian 仓库。 3.10 Virtual machines For testing GUI application, it is good idea to have virtual machines. Install virt-manager and qemu-kvm. Use of chroot and popular. • The tarball centric gbp-buildpackage(1) workflow to record changes to VCS was cumbersome for some Debian developers and dgit(1) was invented in 2013. • The Git centric dgit-maint-debrebase(7) desktop [Desktop Entry] Name=Hello Name[fr]=Bonjour Comment=Greetings Comment[fr]=Salutations Type=Application Keywords=hello Exec=hello Terminal=true Icon=hello.png Categories=Utility; 此处的 hello.png 是图标的图像文件。

feedback, and then adjust what they have produced. As a result, the code can be developed in a user-centric way and match the enterprise’s needs precisely. Risk is low, because the team is constantly adjusting

|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 705628160 (673M) [application/x-iso9660-image] Saving to: ‘ubuntu-20.04.5-live-server-s390x.iso’ ubuntu-20.04.5-live 100%[ |:80... connected. HTTP request sent, awaiting response... 200 OK Length: 700952576 (668M) [application/x-iso9660-image] Saving to: ‘focal-live-server-s390x.iso’ focal-live-server-s 100%[===================>] |:80... connected. HTTP request sent, awaiting response... 200 OK Length: 700952576 (668M) [application/x-iso9660-image] Saving to: ‘focal-live-server-s390x.iso’ focal-live-server-s 100%[===================>]

noted that both editions use the same apt repositories, making it just as easy to install a server application on the Desktop Edition as it is on the Server Edition. The differences between the two editions necessary files, meta-data, and instructions to implement a particular functionality or software application on your Ubuntu computer. Debian package files typically have the extension '.deb', and usually offering only one package, as in the case of package sources provided by the developer of a single application. You should always be very careful and cautious when using non-standard package sources, however

digitalization scenarios. This ecosystem empowers enterprises to develop their software, hardware, and application ecosystems. Development Roadmap 2021.12 1+ million openEuler-based installations 2022.09 Debuted Platform for Versatile Scenarios openEuler supports a diverse range of devices, and covers various application scenarios, and interfaces with other OSs such as OpenHarmony, achieving ecosystem interoperability SCADA PLC ... Cloud Edge Server Embedded Full coverage of mainstream application scenarios Full coverage of mainstream computing architectures OpenHarmony openEuler + OpenHarmony

workspaces, removable devices and the trash. If an application that you want to start using is present in the Launcher, you can click on that application's icon, and it will start up, ready for you to not, if the icon is for an application whether it's running or not, and on the specific icon itself. Available actions can include the following. launching the application or opening the document, the Launcher) quitting the application if it's running switching between application instances or windows if there is more than one instance or window application-specific shortcuts such as open

Reflecting an Organizational Boundary Kubernetes Platform Administrator Kubernetes Application Developer Other Boundaries GitOps Repo Example Conclusion 33 Chapter 6–CI/CD likely be presented with a lot of familiar concepts that seem unrelated. Is GitOps something that application developers use? Is it for infra- structure folks or system administrators? Is it something you (CI/CD) [1.2]? As a matter of fact, GitOps unifies a collection of different topics in automation, application delivery, infrastructure management, and security. In this chapter, I will go through each aspect

OS that supports multiple processor architectures, and to advance the hardware and software application ecosystem. On December 31, 2019, the openEuler open source OS community was officially established semaphore, radical memory, defragmentation, VMAP, and vmalloc significantly improve the memory application efficiency. Enhanced memory maintenance and test features, including KASAN, kmemleak, slub_debug Use the System Restore feature to restore the saved service status and resources. Application Scenarios Application scenario 1: kernel CVE fixes Typical applications, such as Nginx, Redis, and MySQL