this patch gets rid of max concurrency for functions altogether, as discussed,
since it will be challenging to support across functions nodes. as a result of
doing so, the previous version of functions would fall over when offered 1000
functions, so there was some work needed in order to push this through.
further work is necessary as docker basically falls over when trying to start
enough containers at the same time, and with this patch essentially every
function can scale infinitely. it seems like we could add some kind of
adaptive restrictions based on task run length and configured wait time so
that fast running functions will line up to run in a hot container instead of
them all creating new hot containers.
this patch takes a first cut at whacking out some of the insanity that was the
previous concurrency model, which was problematic in that it limited
concurrency significantly across all functions since every task went through
the same unbuffered channel, which could create blocking issues for all
functions if the channel is not picked off fast enough (it's not apparent that
this was impossible in the previous implementation). in any event, each
request has a goroutine already, there's no reason not to use it. not too hard
to wrap a map in a lock, not sure what the benefits were (added insanity?) in effect
this is marginally easier to understand and less insane (marginally). after
getting rid of max c this adds a blocking mechanism for the first invocation
of any function so that all other hot functions will wait on the first one to
finish to avoid a herd issue (was making docker die...) -- this could be
slightly improved, but works in a pinch. reduced some memory usage by having
redundant maps of htfnsvr's and task.Requests (by a factor of 2!). cleaned up
some of the protocol stuff, need to clean this up further. anyway, it's a
first cut. have another patch that rewrites all of it but was getting into
rabbit hole territory, would be happy to oblige if anybody else has problems
understanding this rat's nest of channels. there is a good bit of work left to
make this prod ready (regardless of removing max c).
a warning that this will break the db schemas, didn't put the effort in to add
migration stuff since this isn't deployed anywhere in prod...
TODO need to clean out the htfnmgr bucket with LRU
TODO need to clean up runner interface
TODO need to unify the task running paths across protocols
TODO need to move the ram checking stuff into worker for noted reasons
TODO need better elasticity of hot f(x) containers
* making things work
* #506 - Add ability to login to a private docker registry
* Rolling back "make things work" to test them out more.
* Rolling back "make things work" to test them out more.
* credentials from docker/config.json if ENV is missing
* should get docker auth info just in the init
* update glide lock
* update glide
* Switched to new go dep tool, glide is too frikin annoying.
* Updated circle builds to use dep
* Added GOPATH/bin to path.
* Added GOPATH/bin to path.
* Using regular make test, instead of docker one (not sure why it was using the docker one?).
* Fixes some route creation and updating bugs.
* Updated README
* Added more info the quickstart
* Updated based on PR comments.
* Fixed based on comments.
* Updated per comments.
* API endpoint extensions working.
extensions example.
extensions example.
* Added server.NewEnv and some docs for the API extensions example.
extensions example.
extensions example.
* Uncommented special handler stuff.
* First example of middleware.
easier to use.
* Added a special Middleware context to make middleware easier to use.
* Fix tests.
* Cleanup based on PR comments.
* API endpoint extensions working.
extensions example.
* Added server.NewEnv and some docs for the API extensions example.
extensions example.
example main.go.
* Uncommented special handler stuff.
* Added section in docs for extending API linking to example main.go.
* Commented out special_handler test
* Changed to NewFromEnv
* functions: application updates no longer accept name in the body
AppUpdate was initially conceived as an upsert endpoint for apps.
It turns out that it created an inconsistency regarding updates:
updates with names divergent with URL would not actually change
application's name.
This commit atempts to address the issue by returning an HTTP
error when trying to update an application name. In swagger.yml,
application names are already `readOnly:true`. Thus there is no
change from expected behavior.
Fixes#380
* functions: use specific error value for name change
Ensure that attempts to update route's path are properly handled
with a HTTP error. Moreover, updates swagger file to make it
explicit that routes are immutable.
Fixes#381
