CONSUL
Service discovery and configuration made easy.
High Availability
High availability is a characteristic of a system, which aims to ensure an agreed level of operational performance for a higher than normal period.
- Elimination of single points of failure. This means adding redundancy to the system so that failure of a component does not mean failure of the entire system.
- Reliable crossover. In redundant systems, the crossover point itself tends to become a single point of failure. High availability engineering must provide for reliable crossover.
- Detection of failures as they occur. If the two principles above are observed, then a user may never see a failure. But the maintenance activity must.
Consul's Features
- Service Discovery: Consul makes it simple for services to register themselves and to discover other services via a DNS or HTTP interface. Register external services such as SaaS providers as well.
- Failure Detection: Pairing service discovery with health checking prevents routing requests to unhealthy hosts and enables services to easily provide circuit breakers.
Consul's Features
- Key / Value Storage: Flexible key/value store for dynamic configuration, feature flagging, coordination, leader election and more. Long poll for near-instant notification of configuration changes.
- Multi Datacenter: Consul scales to multiple datacenters out of the box with no complicated configuration. Look up services in other datacenters, or keep the request local.
Service Discovery
- How do we know where services are running?
- How can consumers bind to services?
- What about using meta-data for service discovery?
Key-Value Store
- Distributed key value store for services.
- Provides REST based HTTP api for external interaction.
DEMO