hound-dog v2.9.1
hound-dog
Library for self-registration and service discovery that utilises Etcd for distributed key-value storage. Wraps service data in etcd within a rendezvous hash
Usage
require "hound-dog"
HoundDog.configure do |settings|
settings.service_namespace = "service" # namespace for services
settings.etcd_host = "127.0.0.1" # etcd connection config
settings.etcd_port = 2379
settings.etcd_ttl = 30 # TTL for leases
end
# Create a new Discovery instance
discovery = HoundDog::Discovery.new(
service: "api",
uri: "https://api1:3000",
)
# There are already some nodes in etcd
discovery.nodes #=> [{name: "ulid1", uri: #<URI:0xdeadbeef @fragment=nil, @host="api0", @password=nil, @path="", @port=3000, @query=nil, @scheme="https", @user=nil>}]
discovery.find("sauce") #=> {name: "ulid1", uri: #<URI:0xdeadbeef @fragment=nil, @host="api0", @password=nil, @path="", @port=3000, @query=nil, @scheme="https", @user=nil>}
# Register self to etcd
spawn(same_thread: true) { discovery.register }
# Rendezvous hash transparently updated
discovery.nodes # [{name: "ulid1", uri: #<URI:0xdeadbeef @fragment=nil, @host="api0", @password=nil, @path="", @port=3000, @query=nil, @scheme="https", @user=nil>}, {name: "ulid2", uri: #<URI:0xbeefcafe @fragment=nil, @host="api0", @password=nil, @path="", @port=3000, @query=nil, @scheme="https", @user=nil>}]
etcd
Namespacing
All services are registered beneath configured service namespace, i.e. a node under namespace service
will be keyed as service/#{service_name}/#{name}
. Values are base64 encoded strings in the form uri
.
Version
Developed against ETCD_API=3
and etcd-server v3.3.13
, using etcd's JSON-gRPC API gateway.
Testing
$ crystal spec
Contributing
- Fork it
- Create your feature branch (
git checkout -b my-new-feature
) - Commit your changes (
git commit -am 'Add some feature'
) - Push to the branch (
git push origin my-new-feature
) - Create a new Pull Request
Contributors
- Caspian Baska - creator and maintainer
Repository
hound-dog
Owner
Statistic
- 4
- 1
- 0
- 1
- 9
- over 1 year ago
- July 30, 2018
License
MIT License
Links
Synced at
Fri, 22 Nov 2024 22:56:50 GMT
Languages