This saves memory and CPU time encoding and decoding.
We assume that no probes that old are still running, and we don't need
to reconstruct the data for saved historical reports because controls
are not relevant to historical nodes.
Removed to reduce CPU and memory usage in probes.
This code was added in August 2016 so that newer probes could be used
with older apps. Since then we have adopted the stance that new apps
will accept reports from old probes but not vice-versa, on a version
change.
Old probes do not report namespace topologies.
`report.upgradeNamespaces()` recontructs namespace topologies using the data available from other kubernetes resources.
Also, add a test.
It is unused and none of the adjacency mapping code in the renderer
takes any notice of it. Removing this shrinks the report size.
Edges were introduced in #838. At the time we had an experimental
packet sniffer under experimental/sniff/sniffer.go. That got removed
in #1646.
We can resurrect this if we ever decide to add meta data to edges.
The new probe will convert all node's LatestControls to Controls, so
the old app can consume them. Also, the new app will convert all
node's Controls to LatestControl, so it can consume the reports from
old probes.
Squash of:
- use detailed.Summaries to render topology nodes
- ban merging nodes of different topologies (they should be mapped)
- need to prune parents when mapping node types
- render container images by id if they have no name
- remove separate render ids and prune parents in NewDerived*
- don't render metrics/metadata for groups of nodes
- fixing up tests
- removing pending unit tests (for mapping.go, for now)
- updating experimental dir for RenderableNode removal
- All HostMetadata information becomes NodeMetadata
- Significant change to mechanics, but same net effect
- LocalNets becomes "local_networks", space-separated list of CIDRs
- Load becomes simple single string
- Use MakeHostNodeID for indexing into Host topology
- (That changes the app /origin/{id} handler; will be removed later)
