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Update docs for how to add a provider

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Brian Goff
2018-11-21 10:04:36 -08:00
parent 023fd1214a
commit 4cb94dd19b
1 changed files with 35 additions and 12 deletions
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README.md
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@@ -177,40 +177,63 @@ The structure we chose allows you to have all the power of the Kubernetes API
on top with a pluggable interface. on top with a pluggable interface.
Create a new directory for your provider under `providers` and implement the Create a new directory for your provider under `providers` and implement the
following interface. Then add your new provider under the others in the following interface. Then add register your provider in
[`vkubelet/provider.go`](vkubelet/provider.go) file. `providers/register/<provider_name>_provider.go`. Make sure to add a build tag so that
your provider can be excluded from being built. The format for this build tag
should be `no_<provider_name>_provider`. Also make sure your provdider has all
neccessary platform build tags, e.g. "linux" if your provider only compiles on Linux.
```go ```go
// Provider contains the methods required to implement a virtual-kubelet provider. // Provider contains the methods required to implement a virtual-kubelet provider.
type Provider interface { type Provider interface {
// CreatePod takes a Kubernetes Pod and deploys it within the provider. // CreatePod takes a Kubernetes Pod and deploys it within the provider.
CreatePod(pod *v1.Pod) error CreatePod(ctx context.Context, pod *v1.Pod) error
// UpdatePod takes a Kubernetes Pod and updates it within the provider. // UpdatePod takes a Kubernetes Pod and updates it within the provider.
UpdatePod(pod *v1.Pod) error UpdatePod(ctx context.Context, pod *v1.Pod) error
// DeletePod takes a Kubernetes Pod and deletes it from the provider. // DeletePod takes a Kubernetes Pod and deletes it from the provider.
DeletePod(pod *v1.Pod) error DeletePod(ctx context.Context, pod *v1.Pod) error
// GetPod retrieves a pod by name from the provider (can be cached). // GetPod retrieves a pod by name from the provider (can be cached).
GetPod(namespace, name string) (*v1.Pod, error) GetPod(ctx context.Context, namespace, name string) (*v1.Pod, error)
// GetPodStatus retrievesthe status of a pod by name from the provider. // GetContainerLogs retrieves the logs of a container by name from the provider.
GetPodStatus(namespace, name string) (*v1.PodStatus, error) GetContainerLogs(ctx context.Context, namespace, podName, containerName string, tail int) (string, error)
// ExecInContainer executes a command in a container in the pod, copying data
// between in/out/err and the container's stdin/stdout/stderr.
ExecInContainer(name string, uid types.UID, container string, cmd []string, in io.Reader, out, err io.WriteCloser, tty bool, resize <-chan remotecommand.TerminalSize, timeout time.Duration) error
// GetPodStatus retrieves the status of a pod by name from the provider.
GetPodStatus(ctx context.Context, namespace, name string) (*v1.PodStatus, error)
// GetPods retrieves a list of all pods running on the provider (can be cached). // GetPods retrieves a list of all pods running on the provider (can be cached).
GetPods() ([]*v1.Pod, error) GetPods(context.Context) ([]*v1.Pod, error)
// Capacity returns a resource list with the capacity constraints of the provider. // Capacity returns a resource list with the capacity constraints of the provider.
Capacity() v1.ResourceList Capacity(context.Context) v1.ResourceList
// NodeConditions returns a list of conditions (Ready, OutOfDisk, etc), which is polled periodically to update the node status // NodeConditions returns a list of conditions (Ready, OutOfDisk, etc), which is
// polled periodically to update the node status within Kubernetes.
NodeConditions(context.Context) []v1.NodeCondition
// NodeAddresses returns a list of addresses for the node status
// within Kubernetes. // within Kubernetes.
NodeConditions() []v1.NodeCondition NodeAddresses(context.Context) []v1.NodeAddress
// NodeDaemonEndpoints returns NodeDaemonEndpoints for the node status
// within Kubernetes.
NodeDaemonEndpoints(context.Context) *v1.NodeDaemonEndpoints
// OperatingSystem returns the operating system the provider is for. // OperatingSystem returns the operating system the provider is for.
OperatingSystem() string OperatingSystem() string
} }
// PodMetricsProvider is an optional interface that providers can implement to expose pod stats
type PodMetricsProvider interface {
GetStatsSummary(context.Context) (*stats.Summary, error)
}
``` ```
## Testing ## Testing