- Documentation, guides and support for Jenkins X.
- Slack serves as the main communication platform for the Kubernetes community outside of the mailing lists. It’s important that conversations stays on topic in each channel, and that everyone abides by the Code of Conduct. There are over 100,000 members who should all expect to have a positive experience. Chat is searchable and public.
Kubernetes 会逐步部署你的应用程序，或者其他配置，同时监控程序运行状况，以确保不会同时关闭所有实例。 如果出现问题, Kubernetes 回滚你的修改。 是一个具有增长性的优秀的部署解决方案。.
The Kubernetes community -- users, contributors, and the culture we've built together -- is one of the biggest reasons for the meteoric rise of this open source project. Our culture and values continue to grow and change as the project itself grows and changes. We all work together toward constant improvement of the project and the ways we work on it.
We are the people who file issues and pull requests, attend SIG meetings, Kubernetes meetups, and KubeCon, advocate for it's adoption and innovation, run kubectl get pods, and contribute in a thousand other vital ways. Read on to learn how you can get involved and become part of this amazing community.
There are a number of great open source tools for bare metal host provisioning, including Ironic. Metal³ aims to build on these technologies to provide a Kubernetes native API for managing bare metal hosts via a provisioning stack that is also running on Kubernetes. We believe that Kubernetes Native Infrastructure, or managing your infrastructure just like your applications, is a powerful next step in the evolution of infrastructure management.
The Metal³ project is also building integration with the Kubernetes cluster-api project, allowing Metal³ to be used as an infrastructure backend for Machine objects from the Cluster API. Os x 10.6 requirements.
There is a Metal³ overview and some more detailed design documents in the metal3-docs repository.
The baremetal-operator is the component that manages bare metal hosts. It exposes a new BareMetalHost custom resource in the Kubernetes API that lets you manage hosts in a declarative way.
Finally, the cluster-api-provider-baremetal repository includes integration with the cluster-api project. This provider currently includes a Machine actuator that acts as a client of the BareMetalHost custom resources.
The project has been going for a few months now, and there’s enough now to show some working code.
For this demonstration, I’ve started with a 3 node Kubernetes cluster installed using OpenShift.
Machine objects were created to reflect these 3 masters, as well.
For this cluster-api provider, a Machine has a corresponding BareMetalHost object, which corresponds to the piece of hardware we are managing. There is a design document that covers the relationship between Nodes, Machines, and BareMetalHosts.
Since these hosts were provisioned earlier, they are in a special “externally provisioned” state, indicating that we enrolled them in management while they were already running in a desired state. If changes are needed going forward, the baremetal-operator will be able to automate them.
Now suppose we’d like to expand this cluster by adding another bare metal host to serve as a worker node. First we need to create a new BareMetalHost object that adds this new host to the inventory of hosts managed by the baremetal-operator. Here’s the YAML for the new BareMetalHost:
Now to add the BareMetalHost and its IPMI credentials Secret to the cluster:
K8s Sig
The list of BareMetalHosts now reflects a new host in the inventory that is ready to be provisioned. It will remain in this “ready” state until it is claimed by a new Machine object.
Ci Cd Pipeline Kubernetes
We have a MachineSet already created for workers, but it scaled down to 0.
We can scale this MachineSet to 1 to indicate that we’d like a worker provisioned. The baremetal cluster-api provider will then look for an available BareMetalHost, claim it, and trigger provisioning of that host.
Kubernetes Slack Channel
After the new Machine was created, our cluster-api provider claimed the available host and triggered it to be provisioned.
This process takes some time. Under the hood, the baremetal-operator is driving Ironic through a provisioning process. This begins with wiping disks to ensure the host comes up in a clean state. It will eventually write the desired OS image to disk and then reboot into that OS. When complete, a new Kubernetes Node will register with the cluster.
The following screen cast demonstrates this process, as well:
Kubernetes Slack Emoji
Removing a bare metal host from the cluster is very similar. We just have to scale this MachineSet back down to 0.
Once the Machine has been deleted, the baremetal-operator will deprovision the bare metal host.
Once the deprovisioning process is complete, the bare metal host will be back to its “ready” state, available in the host inventory to be claimed by a future Machine object.
All development is happening on github. We have a metal3-dev mailing list and use #cluster-api-baremetal on Kubernetes Slack to chat. Occasional project updates are posted to @metal3_io on Twitter.