DestinationRule ServiceEntry Gateway VirtualService Some service outside of cluster Version 1 Version 2 #IstioCon Brush up on Istio resources (cont’d) Target Audience What to expect Istio Multicluster DestinationRule ServiceEntry Gateway VirtualService Some service outside of cluster Version 1 Version 2 Extended Mesh Defines endpoints outside of cluster as a part of Service Mesh #IstioCon DestinationRule ServiceEntry Gateway VirtualService Some service outside of cluster Version 1 Version 2 Manage inbound and outbound traffic, allowing non-sidecar components to work with VirtualService

in Kubernetes • GitOps for Kubernetes Essentials • Conclusion Git is the most widely used version control system, with more than 80 percent of its market share in today’s software industry. GitOps developer experience. In the last few years, the number of tools and systems needed to manage version control, configuration management, Infrastructure as Code, CI/CD, and observability have drastically emerged where infrastructure and application configuration changes revolve around Git, i.e., the version control ecosystem. The focus is entirely on keeping Git as a single source of truth for infrastructure

state is stored in a way that enforces immutability and versioning and that retains a complete version history. The canonical example of the “versioned and immutable” principle is Git, which is why tracked in a new version without altering previous versions (except if the user requests a change explicitly, an extreme and rare event). So you can revert back to a previous version while preserving all” operator modeled after what Weaveworks felt that it meant to do a GitOps workflow. With Flux version 2, the functions were broken up into individual components, called the GitOps Toolkit, and were

infrastructure GitOps allows developers or the Ops team to declare their infrastructure as code and version control them via Git. Whenever a new change is required, a pull request with the new change is created versioned in Git All the declarative states are stored in the version-controlled system, which acts as the single source of truth. With this version-controlled approach, all the system infrastructure changes ultimately results in faster developments and deployments. Improved reliability & stability In a version-controlled infrastructure approach, infrastructure changes are validated, and the state is always

Whatever you choose for your delivery pipeline, applying GitOps best practices with Git (or any version control) should be an integral component of your process. It will make building and adopting continuous canonical desired system state is versioned in Git. With the declaration of your system stored in a version control system, and serving as your canonical source of truth, you have a single place from which ensure correctness and alert on divergence Once the state of your system is declared and kept under version control, software agents can inform you whenever reality doesn’t match your expectations. The

operator, in their case, Flux, detects a new version, Flagger spins up a new canary release and shifts traffic gradually over from an existing service to the new version while Flagger’s load generator simulates traffic is moved from the primary to the canary version. If the release goes as planned, the canary will end up with 100% of the traffic and the old version will be retired. The biggest difference MediaMarktSaturn namespace with all the tools they need for development and monitoring. With RBAC, SSO, and Git’s version control, you can make core DevSecOps practices the norm without any added effort. Leverage Flagger

You merge (or create a commit) in Git, and your cluster for environment X is now getting the new version. But how do you promote this release to environment Y? Every time somebody declares that adopting in Git makes rollbacks in GitOps (supposedly) very easy. If you want to rollback to a previous version, you simply use a past commit for your sync operation. In practice, however, it is not entirely to QA in order to examine a bug) ● has a configuration mechanism in place to define multiple version of the same environment (i.e. for different geographical regions) Promotion of environments

software development lifecycle, GitOps contributes to the automation of infrastructure. This includes version control, collaboration, compliance, and CI/CD. GitOps is a specific implementation of DevOps that state is stored in a way that enforces immutability and versioning and retains a complete version history. 3. Pulled automatically Software agents automatically pull the desired state declarations

application code itself to the underlying infrastructure and configuration – you can keep it in version control. This means the desired state and any changes of an entire application stack from the container production. GitOps introduces key safety nets. With the entire state of a running application held in version history, teams can deploy more frequently in the knowledge that deployments can be rolled back

if you distribute this document or an adaptation of it, you must provide the URL for the original version. Red Hat, as the licensor of this document, waives the right to enforce, and agrees not to assert $ oc adm must-gather --image=registry.redhat.io/openshift-gitops-1/must-gather-rhel8: version_tag> 1 Red Hat OpenShift GitOps 1.13 了解 了解 OpenShift GitOps 12 1 1 GitOps 的 的 must-gather