In https://github.com/hashicorp/consul/pull/8065 we attempted to reduce
the amount of times that the UI requests the discovery chain endpoint
when connect is disabled on a datacenter.
Currently we can only tell if connect is disabled on a datacenter by
detecting a 500 error from a connect related endpoint.
In the above PR we mistakenly returned from a catch instead of
rethrowing the error, which meant that when a none 500 error was caught
the discovery chain data would be removed. Whilst at first glance this
doens't seem like a big problem due to the endpoint erroring, but we
also receive a 0 error when we abort endpoints during blocking queries.
This means that in certain cases we can remove cached data for the
discovery chain and then delay reloading it via a blocking query.
This PR replaces the return with a throw, which means that everything is
dealt with correctly via the blocking query error detection/logic.
* Add data layer for discovery chain (model/adapter/serializer/repo)
* Add routing plus template for routing tab
* Add extra deps - consul-api-double upgrade plus ngraph for graphing
* Add discovery-chain and related components and helpers:
1. discovery-chain to orchestrate/view controller
2. route-card, splitter-card, resolver card to represent the 3 different
node types.
3. route-match helper for easy formatting of route rules
4. dom-position to figure out where things are in order to draw lines
5. svg-curve, simple wrapper around svg's <path d=""> attribute format.
6. data-structs service. This isn't super required but we are using
other data-structures provided by other third party npm modules in other
yet to be merged PRs. All of these types of things will live here for
easy access/injection/changability
7. Some additions to our css-var 'polyfill' for a couple of extra needed
rules
* Related CSS for discovery chain
1. We add a %card base component here, eventually this will go into our
base folder and %stats-card will also use it for a base component.
2. New icon for failovers
* ui: Discovery Chain Continued (#6939)
1. Add in the things we use for the animations
2 Use IntersectionObserver so we know when the tab is visible,
otherwise the dom-position helper won't work as the dom elements don't
have any display.
3. Add some base work for animations and use them a little
4. Try to detect if a resolver is a redirect. Right now this works for
datacenters and namespaces, but it can't work for services and subsets -
we are awaiting backend support for doing this properly.
5. Add a fake 'this service has no routes' route that says 'Default'
6. redirect icon
7. Add CSS.escape polyfill for Edge
John Cowen