render

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 Go to latest Published: Aug 19, 2015 License: Apache-2.0 Imports: 12 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	UncontainedID    = "uncontained"
	UncontainedMajor = "Uncontained"

	TheInternetID    = "theinternet"
	TheInternetMajor = "The Internet"
)

Constants are used in the tests.

Variables

View Source 
var AddressRenderer = LeafMap{
	Selector: report.SelectAddress,
	Mapper:   MapAddressIdentity,
	Pseudo:   GenericPseudoNode(report.AddressIDAddresser),
}

AddressRenderer is a Renderer which produces a renderable address graph from the address topology.

View Source 
var ContainerImageRenderer = Map{
	MapFunc: MapContainerImage2Name,
	Renderer: MakeReduce(
		Map{
			MapFunc:  MapContainer2ContainerImage,
			Renderer: ContainerRenderer,
		},
		LeafMap{
			Selector: report.SelectContainerImage,
			Mapper:   MapContainerImageIdentity,
			Pseudo:   PanicPseudoNode,
		},
	),
}

ContainerImageRenderer is a Renderer which produces a renderable container image graph by merging the container graph and the container image topology.

View Source 
var ContainerRenderer = MakeReduce(
	Map{
		MapFunc:  MapProcess2Container,
		Renderer: ProcessRenderer,
	},
	LeafMap{
		Selector: report.SelectContainer,
		Mapper:   MapContainerIdentity,
		Pseudo:   PanicPseudoNode,
	},
)

ContainerRenderer is a Renderer which produces a renderable container graph by merging the process graph and the container topology.

View Source 
var EndpointRenderer = LeafMap{
	Selector: report.SelectEndpoint,
	Mapper:   MapEndpointIdentity,
	Pseudo:   GenericPseudoNode(report.EndpointIDAddresser),
}

EndpointRenderer is a Renderer which produces a renderable endpoint graph.

View Source 
var HostRenderer = MakeReduce(
	Map{
		MapFunc:  MapAddress2Host,
		Renderer: AddressRenderer,
	},
	LeafMap{
		Selector: report.SelectHost,
		Mapper:   MapHostIdentity,
		Pseudo:   PanicPseudoNode,
	},
)

HostRenderer is a Renderer which produces a renderable host graph from the host topology and address graph.

View Source 
var ProcessNameRenderer = Map{
	MapFunc:  MapProcess2Name,
	Renderer: ProcessRenderer,
}

ProcessRenderer is a Renderer which produces a renderable process name graph by munging the progess graph.

View Source 
var ProcessRenderer = MakeReduce(
	Map{
		MapFunc:  MapEndpoint2Process,
		Renderer: EndpointRenderer,
	},
	LeafMap{
		Selector: report.SelectProcess,
		Mapper:   MapProcessIdentity,
		Pseudo:   PanicPseudoNode,
	},
)

ProcessRenderer is a Renderer which produces a renderable process graph by merging the endpoint graph and the process topology.

Functions

func LocalNetworks 

func LocalNetworks(r report.Report) report.Networks

LocalNetworks returns a superset of the networks (think: CIDRs) that are "local" from the perspective of each host represented in the report. It's used to determine which nodes in the report are "remote", i.e. outside of our infrastructure.

func MakeAddressID 

func MakeAddressID(hostID, addr string) string

MakeAddressID makes an address node ID for rendered nodes.

func MakeEndpointID 

func MakeEndpointID(hostID, addr, port string) string

MakeEndpointID makes an endpoint node ID for rendered nodes.

func MakeHostID 

func MakeHostID(hostID string) string

MakeHostID makes a host node ID for rendered nodes.

func MakeProcessID 

func MakeProcessID(hostID, pid string) string

MakeProcessID makes a process node ID for rendered nodes.

func MakePseudoNodeID 

func MakePseudoNodeID(parts ...string) string

MakePseudoNodeID produces a pseudo node ID from its composite parts, for use in rendered nodes.

Types

type DetailedNode 

type DetailedNode struct {
	ID         string  `json:"id"`
	LabelMajor string  `json:"label_major"`
	LabelMinor string  `json:"label_minor,omitempty"`
	Pseudo     bool    `json:"pseudo,omitempty"`
	Tables     []Table `json:"tables"`
}

DetailedNode is the data type that's yielded to the JavaScript layer when we want deep information about an individual node.

func MakeDetailedNode 

func MakeDetailedNode(r report.Report, n RenderableNode) DetailedNode

MakeDetailedNode transforms a renderable node to a detailed node. It uses aggregate metadata, plus the set of origin node IDs, to produce tables.

type Diff 

type Diff struct {
	Add    []RenderableNode `json:"add"`
	Update []RenderableNode `json:"update"`
	Remove []string         `json:"remove"`
}

Diff is returned by TopoDiff. It represents the changes between two RenderableNode maps.

func TopoDiff 

func TopoDiff(a, b RenderableNodes) Diff

TopoDiff gives you the diff to get from A to B.

type FilterUnconnected 

type FilterUnconnected struct {
	Renderer
}

FilterUnconnected is a Renderer which filters out unconnected nodes.

func (FilterUnconnected) Render 

func (f FilterUnconnected) Render(rpt report.Report) RenderableNodes

Render produces a set of RenderableNodes given a Report

type LeafMap 

type LeafMap struct {
	Selector report.TopologySelector
	Mapper   LeafMapFunc
	Pseudo   PseudoFunc
}

LeafMap is a Renderer which produces a set of RenderableNodes from a report.Topology by using a map function and topology selector.

func (LeafMap) EdgeMetadata added in v0.6.0 

func (m LeafMap) EdgeMetadata(rpt report.Report, srcRenderableID, dstRenderableID string) report.EdgeMetadata

EdgeMetadata gives the metadata of an edge from the perspective of the srcRenderableID. Since an edgeID can have multiple edges on the address level, it uses the supplied mapping function to translate address IDs to renderable node (mapped) IDs.

func (LeafMap) Render 

func (m LeafMap) Render(rpt report.Report) RenderableNodes

Render transforms a given Report into a set of RenderableNodes, which the UI will render collectively as a graph. Note that a RenderableNode will always be rendered with other nodes, and therefore contains limited detail.

Nodes with the same mapped IDs will be merged.

type LeafMapFunc 

type LeafMapFunc func(report.NodeMetadata) (RenderableNode, bool)

LeafMapFunc is anything which can take an arbitrary NodeMetadata, which is always one-to-one with nodes in a topology, and return a specific representation of the referenced node, in the form of a node ID and a human-readable major and minor labels.

A single NodeMetadata can yield arbitrary many representations, including representations that reduce the cardinality of the set of nodes.

If the final output parameter is false, the node shall be omitted from the rendered topology.

type Map 

type Map struct {
	MapFunc
	Renderer
}

Map is a Renderer which produces a set of RenderableNodes from the set of RenderableNodes produced by another Renderer.

func (Map) EdgeMetadata added in v0.6.0 

func (m Map) EdgeMetadata(rpt report.Report, srcRenderableID, dstRenderableID string) report.EdgeMetadata

EdgeMetadata gives the metadata of an edge from the perspective of the srcRenderableID. Since an edgeID can have multiple edges on the address level, it uses the supplied mapping function to translate address IDs to renderable node (mapped) IDs.

func (Map) Render 

func (m Map) Render(rpt report.Report) RenderableNodes

Render transforms a set of RenderableNodes produces by another Renderer. using a map function

type MapFunc 

type MapFunc func(RenderableNode) (RenderableNode, bool)

MapFunc is anything which can take an arbitrary RenderableNode and return another RenderableNode.

As with LeafMapFunc, if the final output parameter is false, the node shall be omitted from the rendered topology.

type PseudoFunc 

type PseudoFunc func(srcNodeID string, srcNode RenderableNode, dstNodeID string, local report.Networks) (RenderableNode, bool)

PseudoFunc creates RenderableNode representing pseudo nodes given the dstNodeID. The srcNode renderable node is essentially from MapFunc, representing one of the rendered nodes this pseudo node refers to. srcNodeID and dstNodeID are node IDs prior to mapping.

func GenericPseudoNode 

func GenericPseudoNode(addresser func(id string) net.IP) PseudoFunc

GenericPseudoNode makes a PseudoFunc given an addresser. The returned PseudoFunc will produce Internet pseudo nodes for addresses not in the report's local networks. Otherwise, the returned function will produce a single pseudo node per (dst address, src address, src port).

type Reduce 

type Reduce []Renderer

Reduce renderer is a Renderer which merges together the output of several other renderers.

func (Reduce) EdgeMetadata added in v0.6.0 

func (r Reduce) EdgeMetadata(rpt report.Report, localID, remoteID string) report.EdgeMetadata

EdgeMetadata produces an EdgeMetadata for a given edge.

func (Reduce) Render 

func (r Reduce) Render(rpt report.Report) RenderableNodes

Render produces a set of RenderableNodes given a Report.

type RenderableNode 

type RenderableNode struct {
	ID         string        `json:"id"`                    //
	LabelMajor string        `json:"label_major"`           // e.g. "process", human-readable
	LabelMinor string        `json:"label_minor,omitempty"` // e.g. "hostname", human-readable, optional
	Rank       string        `json:"rank"`                  // to help the layout engine
	Pseudo     bool          `json:"pseudo,omitempty"`      // sort-of a placeholder node, for rendering purposes
	Adjacency  report.IDList `json:"adjacency,omitempty"`   // Node IDs (in the same topology domain)
	Origins    report.IDList `json:"origins,omitempty"`     // Core node IDs that contributed information

	report.EdgeMetadata `json:"metadata"` // Numeric sums
	report.NodeMetadata `json:"-"`        // merged NodeMetadata of the nodes used to build this
}

RenderableNode is the data type that's yielded to the JavaScript layer as an element of a topology. It should contain information that's relevant to rendering a node when there are many nodes visible at once.

func MapAddress2Host 

func MapAddress2Host(n RenderableNode) (RenderableNode, bool)

MapAddress2Host maps address RenderableNodes to host RenderableNodes.

Otherthan pseudo nodes, we can assume all nodes have a HostID

func MapAddressIdentity 

func MapAddressIdentity(m report.NodeMetadata) (RenderableNode, bool)

MapAddressIdentity maps an address topology node to an address renderable node. As it is only ever run on address topology nodes, we expect that certain keys are present.

func MapContainer2ContainerImage 

func MapContainer2ContainerImage(n RenderableNode) (RenderableNode, bool)

MapContainer2ContainerImage maps container RenderableNodes to container image RenderableNodes.

If this function is given a node without a docker_image_id (including other pseudo nodes), it will produce an "Uncontained" pseudo node.

Otherwise, this function will produce a node with the correct ID format for a container, but without any Major or Minor labels. It does not have enough info to do that, and the resulting graph must be merged with a container graph to get that info.

func MapContainerIdentity 

func MapContainerIdentity(m report.NodeMetadata) (RenderableNode, bool)

MapContainerIdentity maps a container topology node to a container renderable node. As it is only ever run on container topology nodes, we expect that certain keys are present.

func MapContainerImage2Name added in v0.5.0 

func MapContainerImage2Name(n RenderableNode) (RenderableNode, bool)

MapContainerImage2Name maps container images RenderableNodes to RenderableNodes for each container image name.

This mapper is unlike the other foo2bar mappers as the intention is not to join the information with another topology. Therefore it outputs a properly-formed node with labels etc.

func MapContainerImageIdentity 

func MapContainerImageIdentity(m report.NodeMetadata) (RenderableNode, bool)

MapContainerImageIdentity maps a container image topology node to container image renderable node. As it is only ever run on container image topology nodes, we expect that certain keys are present.

func MapEndpoint2Process 

func MapEndpoint2Process(n RenderableNode) (RenderableNode, bool)

MapEndpoint2Process maps endpoint RenderableNodes to process RenderableNodes.

If this function is given a pseudo node, then it will just return it; Pseudo nodes will never have pids in them, and therefore will never be able to be turned into a Process node.

Otherwise, this function will produce a node with the correct ID format for a process, but without any Major or Minor labels. It does not have enough info to do that, and the resulting graph must be merged with a process graph to get that info.

func MapEndpointIdentity 

func MapEndpointIdentity(m report.NodeMetadata) (RenderableNode, bool)

MapEndpointIdentity maps an endpoint topology node to an endpoint renderable node. As it is only ever run on endpoint topology nodes, we expect that certain keys are present.

func MapHostIdentity 

func MapHostIdentity(m report.NodeMetadata) (RenderableNode, bool)

MapHostIdentity maps a host topology node to a host renderable node. As it is only ever run on host topology nodes, we expect that certain keys are present.

func MapProcess2Container 

func MapProcess2Container(n RenderableNode) (RenderableNode, bool)

MapProcess2Container maps process RenderableNodes to container RenderableNodes.

If this function is given a node without a docker_container_id (including other pseudo nodes), it will produce an "Uncontained" pseudo node.

Otherwise, this function will produce a node with the correct ID format for a container, but without any Major or Minor labels. It does not have enough info to do that, and the resulting graph must be merged with a container graph to get that info.

func MapProcess2Name 

func MapProcess2Name(n RenderableNode) (RenderableNode, bool)

MapProcess2Name maps process RenderableNodes to RenderableNodes for each process name.

This mapper is unlike the other foo2bar mappers as the intention is not to join the information with another topology. Therefore it outputs a properly-formed node with labels etc.

func MapProcessIdentity 

func MapProcessIdentity(m report.NodeMetadata) (RenderableNode, bool)

MapProcessIdentity maps a process topology node to a process renderable node. As it is only ever run on process topology nodes, we expect that certain keys are present.

func NewRenderableNode 

func NewRenderableNode(id, major, minor, rank string, nmd report.NodeMetadata) RenderableNode

NewRenderableNode makes a new RenderableNode

func PanicPseudoNode 

func PanicPseudoNode(src string, srcMapped RenderableNode, dst string, local report.Networks) (RenderableNode, bool)

PanicPseudoNode just panics; it is for Topologies without edges

func (*RenderableNode) Merge 

func (rn *RenderableNode) Merge(other RenderableNode)

Merge merges in another RenderableNode

type RenderableNodes 

type RenderableNodes map[string]RenderableNode

RenderableNodes is a set of RenderableNodes

func OnlyConnected 

func OnlyConnected(input RenderableNodes) RenderableNodes

OnlyConnected filters out unconnected RenderedNodes

func (RenderableNodes) Merge 

func (rns RenderableNodes) Merge(other RenderableNodes)

Merge merges two sets of RenderableNodes

type Renderer 

type Renderer interface {
	Render(report.Report) RenderableNodes
	EdgeMetadata(rpt report.Report, localID, remoteID string) report.EdgeMetadata
}

Renderer is something that can render a report to a set of RenderableNodes.

func MakeReduce 

func MakeReduce(renderers ...Renderer) Renderer

MakeReduce is the only sane way to produce a Reduce Renderer.

type Row 

type Row struct {
	Key        string `json:"key"`                   // e.g. Ingress
	ValueMajor string `json:"value_major"`           // e.g. 25
	ValueMinor string `json:"value_minor,omitempty"` // e.g. KB/s
}

Row is a single entry in a Table dataset.

type Table 

type Table struct {
	Title   string `json:"title"`   // e.g. Bandwidth
	Numeric bool   `json:"numeric"` // should the major column be right-aligned?
	Rank    int    `json:"-"`       // used to sort tables; not emitted.
	Rows    []Row  `json:"rows"`
}

Table is a dataset associated with a node. It will be displayed in the detail panel when a user clicks on a node.

func OriginTable 

func OriginTable(r report.Report, originID string) (Table, bool)

OriginTable produces a table (to be consumed directly by the UI) based on an origin ID, which is (optimistically) a node ID in one of our topologies.

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