* captplanet
I kind of went overboard this weekend.
The major goal of this changeset is to provide an environment
for local development where all of the various services can
be easily run together. Developing on Storj v3 should be as
easy as running a setup command and a run command!
To do this, this changeset introduces a new tool called
captplanet, which combines the powers of the Overlay Cache,
the PointerDB, the PieceStore, Kademlia, the Minio Gateway,
etc.
Running 40 farmers and a heavy client inside the same process
forced a rethinking of the "services" that we had. To
avoid confusion by reusing prior terms, this changeset
introduces two new types: Providers and Responsibilities.
I wanted to avoid as many merge conflicts as possible, so
I left the existing Services and code for now, but if people
like this route we can clean up the duplication.
A Responsibility is a collection of gRPC methods and
corresponding state. The following systems are examples of
Responsibilities:
* Kademlia
* OverlayCache
* PointerDB
* StatDB
* PieceStore
* etc.
A Provider is a collection of Responsibilities that
share an Identity, such as:
* The heavy client
* The farmer
* The gateway
An Identity is a public/private key pair, a node id, etc.
Farmers all need different Identities, so captplanet
needs to support running multiple concurrent Providers
with different Identities.
Each Responsibility and Provider should allow for configuration
of multiple copies on its own so creating Responsibilities and
Providers use a new workflow.
To make a Responsibility, one should create a "config"
struct, such as:
```
type Config struct {
RepairThreshold int `help:"If redundancy falls below this number of
pieces, repair is triggered" default:"30"`
SuccessThreshold int `help:"If redundancy is above this number then
no additional uploads are needed" default:"40"`
}
```
To use "config" structs, this changeset introduces another
new library called 'cfgstruct', which allows for the configuration
of arbitrary structs through flagsets, and thus through cobra and
viper.
cfgstruct relies on Go's "struct tags" feature to document
help information and default values. Config structs can be
configured via cfgstruct.Bind for binding the struct to a flagset.
Because this configuration system makes setup and configuration
easier *in general*, additional commands are provided that allow
for easy standup of separate Providers. Please make sure to
check out:
* cmd/captplanet/farmer/main.go (a new farmer binary)
* cmd/captplanet/hc/main.go (a new heavy client binary)
* cmd/captplanet/gw/main.go (a new minio gateway binary)
Usage:
```
$ go install -v storj.io/storj/cmd/captplanet
$ captplanet setup
$ captplanet run
```
Configuration is placed by default in `~/.storj/capt/`
Other changes:
* introduces new config structs for currently existing
Responsibilities that conform to the new Responsibility
interface. Please see the `pkg/*/config.go` files for
examples.
* integrates the PointerDB API key with other global
configuration via flags, instead of through environment
variables through viper like it's been doing. (ultimately
this should also change to use the PointerDB config
struct but this is an okay shortterm solution).
* changes the Overlay cache to use a URL for database
configuration instead of separate redis and bolt config
settings.
* stubs out some peer identity skeleton code (but not the
meat).
* Fixes the SegmentStore to use the overlay client and
pointerdb clients instead of gRPC client code directly
* Leaves a very clear spot where we need to tie the object to
stream to segment store together. There's sort of a "golden
spike" opportunity to connect all the train tracks together
at the bottom of pkg/miniogw/config.go, labeled with a
bunch of TODOs.
Future stuff:
* I now prefer this design over the original
pkg/process.Service thing I had been pushing before (sorry!)
* The experience of trying to have multiple farmers
configurable concurrently led me to prefer config structs
over global flags (I finally came around) or using viper
directly. I think global flags are okay sometimes but in
general going forward we should try and get all relevant
config into config structs.
* If you all like this direction, I think we can go delete my
old Service interfaces and a bunch of flags and clean up a
bunch of stuff.
* If you don't like this direction, it's no sweat at all, and
despite how much code there is here I'm not very tied to any
of this! Considering a lot of this was written between midnight
and 6 am, it might not be any good!
* bind tests
* Updates to config handling
- Add functions to load in configs
- Standardize location and naming of config files
- Configuration over convention style of config file handling for each
service
* update config handling and correclty handle cli flags being set
* generate configs from default if no config is found
- renamed pointerdbDB to pointerdb for clarity in config file
- set sane default for pkg/overlay boltDB file
- set srvPort to default to 8082 to avoid port collision on default
setting
* linter updates
* move boltdb path vars into function
* update tests to handle config environment changes
* --fix exec test mocks
* update tests to use viper instead of flag library
* fix typo
* add redis-server to services in travis for tests
* update examples with new config env function signature
* fix tests
* add reference to dht to overlay client struct
* wip
* wip
* Implement FindNode
* get nodes
* WIP
* Merge in Dennis kademlia code, get it working with our code
* ping and moar
* WIP trying to get cache working with kademlia
* WIP more wiring up
* WIP
* Update service cli commands
* WIP
* added GetNodes
* added nodes to Kbucket
* default transport changed to TCP
* GetBuckets interface changed
* filling in more routing
* timestamp methods
* removed store
* Added initial network overlay explorer page
* Updating and building with dockerfile
* Working on adding bootstrap node code
* WIP merging in dennis' code
* WIP
* connects cache to pkg/kademlia implementation
* WIP redis cache
* testing
* Add bootstrap network function for CLI usage
* cleanup
* call bootstrap on init network
* Add BootstrapNetwork function to interface
* Merge in dennis kad code
* WIP updates to redis/overlay client interface
* WIP trying to get the DHT connected to the cache
* go mod & test
* deps
* Bootstrap node now setting up correctly
- Need to pass it through CLI commands better
* WIP adding refresh and walk functions, added cli flags
- added cli flags for custom bootstrap port and ip
* PR comments addressed
* adding FindStorageNodes to overlay cache
* fix GetBucket
* using SplitHostPort
* Use JoinHostPort
* updates to findstoragenodes response and request
* WIP merge in progress, having issues with a panic
* wip
* adjustments
* update port for dht bootstrap test
* Docker
* wip
* dockerfile
* fixes
* makefile changes
* Update port in NewKademlia call
* Update local kademlia DHT config
* kubernetes yaml
* cleanup
* making tests pass
* k8s yaml
* lint issues
* Edit cli flags to allow for configurable bootstrap IP and Port args
* cleanup
* cache walking the network now
* Rough prototype of Walk function laid out
* Move walk function into bootstrap function
* Update dht.go
* changes to yaml
* goimports
* wip
* wip
* get nodes
* ping and moar
* added GetNodes
* added nodes to Kbucket
* default transport changed to TCP
* GetBuckets interface changed
* filling in more routing
* timestamp methods
* removed store
* testing
* cleanup
* go mod & test
* deps
* PR comments addressed
* fix GetBucket
* using SplitHostPort
* Use JoinHostPort
