104 lines
2.5 KiB
Go
104 lines
2.5 KiB
Go
package watch
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import (
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"fmt"
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"github.com/derailed/k9s/internal/k8s"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/watch"
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"k8s.io/client-go/tools/cache"
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)
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type (
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// Row represents a collection of string fields.
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Row []string
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// RowEvent represents a call for action after a resource reconciliation.
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// Tracks whether a resource got added, deleted or updated.
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RowEvent struct {
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Action watch.EventType
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Fields Row
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Deltas Row
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}
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// RowEvents tracks resource update events.
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RowEvents map[string]*RowEvent
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// TableData tracks a K8s resource for tabular display.
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TableData struct {
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Header Row
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Rows RowEvents
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Namespace string
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}
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)
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// TableListenerFn represents a table data listener.
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type TableListenerFn func(TableData)
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// StoreInformer an informer that allows listeners registration.
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type StoreInformer interface {
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cache.SharedIndexInformer
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Get(fqn string, opts metav1.GetOptions) (interface{}, error)
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List(ns string, opts metav1.ListOptions) k8s.Collection
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}
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// Meta represents a collection of cluster wide watchers.
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type Meta struct {
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informers map[string]StoreInformer
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client k8s.Connection
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podInformer *Pod
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listenerFn TableListenerFn
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}
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// NewMeta creates a new cluster resource informer
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func NewMeta(client k8s.Connection, ns string) *Meta {
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m := Meta{client: client, informers: map[string]StoreInformer{}}
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m.init(ns)
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return &m
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}
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func (m *Meta) init(ns string) {
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po := NewPod(m.client, ns)
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m.informers = map[string]StoreInformer{
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NodeIndex: NewNode(m.client),
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PodIndex: po,
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ContainerIndex: NewContainer(po),
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}
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if m.client.HasMetrics() {
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m.informers[NodeMXIndex] = NewNodeMetrics(m.client)
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m.informers[PodMXIndex] = NewPodMetrics(m.client, ns)
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}
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}
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// List items from store.
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func (m *Meta) List(res, ns string, opts metav1.ListOptions) (k8s.Collection, error) {
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if m == nil {
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return nil, fmt.Errorf("No meta exists")
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}
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if i, ok := m.informers[res]; ok {
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return i.List(ns, opts), nil
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}
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return nil, fmt.Errorf("No informer found for resource %s:%q", res, ns)
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}
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// Get a resource by name.
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func (m Meta) Get(res, fqn string, opts metav1.GetOptions) (interface{}, error) {
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if informer, ok := m.informers[res]; ok {
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return informer.Get(fqn, opts)
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}
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return nil, fmt.Errorf("No informer found for resource %s:%q", res, fqn)
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}
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// Run starts watching cluster resources.
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func (m *Meta) Run(closeCh <-chan struct{}) {
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for i := range m.informers {
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go func(informer StoreInformer, c <-chan struct{}) {
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informer.Run(c)
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}(m.informers[i], closeCh)
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}
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}
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