Apache ZooKeeper vs Consul KV
Apache ZooKeeper: The original coordination service: hierarchical znodes, watches and ephemeral nodes for clusters. Consul KV: The key-value store built into HashiCorp Consul for service config, locks and discovery.
key differences
- Apache ZooKeeper is primarily a hierarchical database; Consul KV is key-value.
- Licensing: Apache ZooKeeper is open source (permissive) (Apache License 2.0); Consul KV is source-available (Business Source License 1.1).
- Only Apache ZooKeeper has ttl / expiry, in-memory.
choose apache-zookeeper for
- +Coordination for HBase, Solr, Pulsar and legacy Kafka
- +Leader election and distributed locks for JVM services
- +Cluster membership and small shared configuration
best at · Coordination, Metadata
choose hashicorp-consul-kv for
- +Dynamic configuration for services in a Consul mesh
- +Feature flags rendered via consul-template
- +Distributed locks and leader election
best at · Coordination, Metadata
Apache ZooKeeper vs Consul KV: FAQ
What is the difference between Apache ZooKeeper and Consul KV?
Apache ZooKeeper: The original coordination service: hierarchical znodes, watches and ephemeral nodes for clusters. Consul KV: The key-value store built into HashiCorp Consul for service config, locks and discovery. Apache ZooKeeper is primarily a hierarchical database; Consul KV is key-value. Licensing: Apache ZooKeeper is open source (permissive) (Apache License 2.0); Consul KV is source-available (Business Source License 1.1). Only Apache ZooKeeper has ttl / expiry, in-memory.
When should I choose Apache ZooKeeper over Consul KV?
Choose Apache ZooKeeper for coordination for HBase, Solr, Pulsar and legacy Kafka; leader election and distributed locks for JVM services; and cluster membership and small shared configuration. Choose Consul KV for dynamic configuration for services in a Consul mesh; feature flags rendered via consul-template; and distributed locks and leader election.
Is Apache ZooKeeper or Consul KV more popular?
Apache ZooKeeper ranks #45 on the WhichDB Score (39.9/100) and Consul KV ranks #49 (39.0/100). Popularity is not fit: check the requirements that matter for your project.
Are Apache ZooKeeper and Consul KV open source?
Yes. Apache ZooKeeper is open source. License: Apache License 2.0. Not in the OSI sense. Consul KV is source-available: you can read the code, but the license restricts some uses, typically offering it as a competing managed service. License: Business Source License 1.1.