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Consul
Consul

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Zookeeper
Zookeeper

419
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38
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Consul vs Zookeeper: What are the differences?

Consul: A tool for service discovery, monitoring and configuration. Consul is a tool for service discovery and configuration. Consul is distributed, highly available, and extremely scalable; Zookeeper: Because coordinating distributed systems is a Zoo. A centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. All of these kinds of services are used in some form or another by distributed applications.

Consul and Zookeeper can be primarily classified as "Open Source Service Discovery" tools.

"Great service discovery infrastructure" is the top reason why over 49 developers like Consul, while over 9 developers mention "High performance ,easy to generate node specific config" as the leading cause for choosing Zookeeper.

Consul is an open source tool with 16.2K GitHub stars and 2.82K GitHub forks. Here's a link to Consul's open source repository on GitHub.

DigitalOcean, imgix, and Leftronic are some of the popular companies that use Consul, whereas Zookeeper is used by Uber Technologies, Pinterest, and Coursera. Consul has a broader approval, being mentioned in 131 company stacks & 52 developers stacks; compared to Zookeeper, which is listed in 116 company stacks and 48 developer stacks.

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What is Consul?

Consul is a tool for service discovery and configuration. Consul is distributed, highly available, and extremely scalable.

What is Zookeeper?

A centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. All of these kinds of services are used in some form or another by distributed applications.
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      What are some alternatives to Consul and Zookeeper?
      etcd
      etcd is a distributed key value store that provides a reliable way to store data across a cluster of machines. It’s open-source and available on GitHub. etcd gracefully handles master elections during network partitions and will tolerate machine failure, including the master.
      SkyDNS
      SkyDNS is a distributed service for announcement and discovery of services. It leverages Raft for high-availability and consensus, and utilizes DNS queries to discover available services. This is done by leveraging SRV records in DNS, with special meaning given to subdomains, priorities and weights (more info here: http://blog.gopheracademy.com/skydns).
      Ambassador
      Map services to arbitrary URLs in a single, declarative YAML file. Configure routes with CORS support, circuit breakers, timeouts, and more. Replace your Kubernetes ingress controller. Route gRPC, WebSockets, or HTTP.
      Redis
      Redis is an open source, BSD licensed, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.
      Kubernetes
      Kubernetes is an open source orchestration system for Docker containers. It handles scheduling onto nodes in a compute cluster and actively manages workloads to ensure that their state matches the users declared intentions.
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      Decisions about Consul and Zookeeper
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      How developers use Consul and Zookeeper
      Avatar of Soundcloud
      Soundcloud uses ZookeeperZookeeper

      Initially, Stitch only supported real-time updates and addressed this problem with a MapReduce job named The Restorator that performed the following actions:

      • Calculated the expected totals
      • Queried Cassandra to get the values it had for each counter
      • Calculated the increments needed to apply to fix the counters
      • Applied the increments

      Meanwhile, to stop the sand shifting under its feet, The Restorator needed to coordinate a locking system between itself and the real-time processors, so that the processors did not try to simultaneously apply increments to the same counter, resulting in a race-condition. It used ZooKeeper for this.

      Avatar of Pinterest
      Pinterest uses ZookeeperZookeeper

      Like many large scale web sites, Pinterest’s infrastructure consists of servers that communicate with backend services composed of a number of individual servers for managing load and fault tolerance. Ideally, we’d like the configuration to reflect only the active hosts, so clients don’t need to deal with bad hosts as often. ZooKeeper provides a well known pattern to solve this problem.

      Avatar of Chris Hartwig
      Chris Hartwig uses ConsulConsul

      All our services use Consul for discovery, configuration and cluster management (auto scaling, health monitoring, dynamic reconfiguration, leader elections)

      Avatar of Pinterest
      Pinterest uses ZookeeperZookeeper

      Zookeeper manages our state, and tells each node what version of code it should be running.

      Avatar of Ralic Lo
      Ralic Lo uses ZookeeperZookeeper

      Used Zookeeper as the resource management system for Mesos/Marathon services.

      Avatar of Tom Staijen
      Tom Staijen uses ConsulConsul

      Discovery service. Some configuration is stored in consul.

      Avatar of Robert Hao
      Robert Hao uses ConsulConsul

      I used Consul as config center & service discoverer.

      Avatar of Nurul Ferdous
      Nurul Ferdous uses ZookeeperZookeeper

      Maintain a distributed cluster for search index

      Avatar of Ismael Arenzana
      Ismael Arenzana uses ConsulConsul

      How else do you discover microservices? ;)

      Avatar of exana
      exana uses ConsulConsul

      For service discovery.

      How much does Consul cost?
      How much does Zookeeper cost?
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