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#DISCOVERY GO TV#

In the realm of microservices, one usually differentiates between the two types of load-balancing mentioned above:Ĭlient-side: it’s up to the client to query a discovery service to get actual address information (ips, hostnames, ports) of services they need to call, from which they then pick one using a load-balancing strategy such as round-robin or random. ” as a standalone concept was discontinued with the release of docker 1.12. Note: when referring to “docker swarm” in this blog series, i am referring to running docker 1.12 or later in Since we’ll be doing service-to-service communication. additionally, we’ll take a look at mocking of outgoing http requests in our unit tests using

#DISCOVERY GO SERIES#

Of the blog series and how it actually provides us with both service discovery and server-side load-balancing. In this blog post, we’ll primarily deal with the mechanisms offered by “docker swarm” (e.g. other popular options are the use of distributed and replicable key-value stores such as That provides a rich feature set including an integrated dns. an option (written in go) that’s becoming more popular is (also supports consul, etcd, and zookeeper) where services register themselves with a known eureka instance and then intermittently sends heartbeats to make sure the eureka instance(s) know they’re still alive. by default, spring cloud/netflix oss uses Most microservice frameworks provide one or several options for service discovery. also, dns servers and the dns protocol are typically not well suited for handling the volatile nature of microservice environments with ever-changing topology with containers and nodes coming and going, clients often not honoring ttl values, failure detection etc. the difference being that service discovery is for use within your internal cluster so your microservices can find each other, while dns typically is for more static and external routing so external parties can have requests routed to your service(s). If this sounds a lot like a dns service to you, it kind of is. in its simplest form, service discovery is just a registry of running instances for one or many services. in the continuously changing context of a microservice landscape, either approach requires so when service a needs to communicate with service b, at least one proper ip address or hostname for an instance of service b must be made available to service a (client-side load balancing) - or - service a must be able to delegate the address resolution and routing to a 3rd party given a known logical name of service b (server-side load balancing). In other words - if we have 10 instances of service b running on an arbitrary number of cluster nodes, someone needs to keep track of all these 10 instances.

“how does service a talk to service b without having any knowledge about where to find service b?” While load-balancing is a rather well-known concept, i think service discovery entails a more in-depth explanation. The company says that more streaming partners will be announced soon.ĭiscovery also announced that Discovery GO will become one of the first Canadian services to offer content in 4K Ultra HD.This part of the blog series will deal with two fundamental pieces of a sound microservice architecture - service discovery and load-balancing - and how they facilitate the kind of horizontal scaling we usually state as an important non-functional requirement in 2017.

#DISCOVERY GO TV#

The service is partnering with several TV subscribers, including Bell Fibe TV, Bell Satellite TV, Eastlink, Shaw Cable, and Shaw Direct, to allow customers to use the service free of charge with their existing cable subscription.

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“This truly is the most robust and convenient one-stop shop for all of Canada’s favourite entertainment specialty programs.”Īt launch, the service will be available through the web, via iOS and Android apps, and on set-top boxes. In a statement, Vice-President and General Manager of Discovery Ken MacDonald said: Viewers can also enjoy Discovery GO exclusives like stunning CGI programs STRIP THE COSMOS and STRIP THE CITY, helping to make up the hundreds of titles and thousands of hours of truly awesome programming that is Discovery’s longstanding hallmark.” “ Discovery GO features all of Canada’s factual favourites in complete season stacks, including HIGHWAY THRU HELL, DEADLIEST CATCH, CLOSE ENCOUNTERS, SHARK WEEK, and HOW IT’S MADE, alongside current episodes of the network’s flagship daily science program, DAILY PLANET.

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