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dc14bd04df
These can be long-running operations, and if the client retries we get the cancelled one running in parallel with the retry, slowing both down and making it likely the next one will time out too.
52 lines
1.5 KiB
Go
52 lines
1.5 KiB
Go
package render
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import (
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"context"
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"github.com/weaveworks/scope/report"
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)
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// Pseudo is the topology for nodes that aren't "real" nodes inside a
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// cluster, such as nodes representing the internet, external
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// services, and artificial grouping such as "uncontained processes"
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// and "unmanaged containers".
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const Pseudo = "pseudo"
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// EndpointRenderer is a Renderer which produces a renderable endpoint graph.
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var EndpointRenderer = SelectEndpoint
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type endpointMapFunc func(report.Node) string
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type mapEndpoints struct {
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f endpointMapFunc
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topology string
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}
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// MapEndpoints creates a renderer for the endpoint topology. Each
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// endpoint is either turned into a pseudo node, or mapped to a node
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// in the specified topology by the supplied function.
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func MapEndpoints(f endpointMapFunc, topology string) Renderer {
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return mapEndpoints{f: f, topology: topology}
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}
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func (e mapEndpoints) Render(ctx context.Context, rpt report.Report) Nodes {
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local := LocalNetworks(rpt)
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endpoints := SelectEndpoint.Render(ctx, rpt)
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ret := newJoinResults(TopologySelector(e.topology).Render(ctx, rpt).Nodes)
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for _, n := range endpoints.Nodes {
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// Nodes without a hostid are mapped to pseudo nodes, if
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// possible.
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if _, ok := n.Latest.Lookup(report.HostNodeID); !ok {
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if id, ok := pseudoNodeID(rpt, n, local); ok {
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ret.addChild(n, id, Pseudo)
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continue
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}
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}
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if id := e.f(n); id != "" {
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ret.addChild(n, id, e.topology)
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}
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}
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return ret.result(ctx, endpoints)
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}
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