Adds a user-configurable rate limiter to proxycfg snapshot delivery,
with a default limit of 250 updates per second.
This addresses a problem observed in our load testing of Consul
Dataplane where updating a "global" resource such as a wildcard
intention or the proxy-defaults config entry could starve the Raft or
Memberlist goroutines of CPU time, causing general cluster instability.
Replaces the reflection-based implementation of proxycfg's
ConfigSnapshot.Clone with code generated by deep-copy.
While load testing server-based xDS (for consul-dataplane) we discovered
this method is extremely expensive. The ConfigSnapshot struct, directly
or indirectly, contains a copy of many of the structs in the agent/structs
package, which creates a large graph for copystructure.Copy to traverse
at runtime, on every proxy reconfiguration.
Copy passed hash before manipulating it.
Assigning to the same hash object will break href-to
because in certain scenarios href-to-helper will
not create a new object that gets passed to
`fsm-with-optional`-hrefTo method.
This is problematic for optional route-params, and lead
to a situation where links to peered services would
create the wrong url for their href-attribute.
We need to explicitly tell the UI to not show the bucket-list
when we are displaying imported services. If we make
this depend on the data we will sometimes not show
it due to data-loader caching.
Working with a peer model as a relationship is much
easier than to workaround a non-relationship in
imported services. This is currently only relevant
for imported-services where we know the peer
in advance.
Add a helper that knows how to format past dates
in a smart way. When less than a week ago we will
use relative date strings - for dates older than a week
we will use a friendly human-readable format.
This matches best practices we want to adhere to
based on what Terraform did for date-formatting.
Dan Upton