4b33bdf396
By using the query results as state. Blocking queries are efficient when the query matches some results, because the ModifyIndex of those results, returned as queryMeta.Mindex, will never change unless the items themselves change. Blocking queries for non-existent items are not efficient because the queryMeta.Index can (and often does) change when other entities are written. This commit reduces the churn of these queries by using a different comparison for "has changed". Instead of using the modified index, we use the existence of the results. If the previous result was "not found" and the new result is still "not found", we know we can ignore the modified index and continue to block. This is done by setting the minQueryIndex to the returned queryMeta.Index, which prevents the query from returning before a state change is observed. |
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| .changelog | ||
| .circleci | ||
| .github | ||
| .release | ||
| acl | ||
| agent | ||
| api | ||
| bench | ||
| build-support | ||
| command | ||
| connect | ||
| contributing | ||
| docs | ||
| grafana | ||
| internal | ||
| ipaddr | ||
| lib | ||
| logging | ||
| proto | ||
| sdk | ||
| sentinel | ||
| service_os | ||
| snapshot | ||
| terraform | ||
| test | ||
| testrpc | ||
| tlsutil | ||
| types | ||
| ui | ||
| version | ||
| website | ||
| .dockerignore | ||
| .gitignore | ||
| .golangci.yml | ||
| CHANGELOG.md | ||
| Dockerfile | ||
| GNUmakefile | ||
| INTERNALS.md | ||
| LICENSE | ||
| NOTICE.md | ||
| README.md | ||
| Vagrantfile | ||
| codecov.yml | ||
| go.mod | ||
| go.sum | ||
| main.go | ||
| main_test.go | ||
| package-lock.json | ||
README.md
Consul
Consul is a distributed, highly available, and data center aware solution to connect and configure applications across dynamic, distributed infrastructure.
- Website: https://www.consul.io
- Tutorials: HashiCorp Learn
- Forum: Discuss
Consul provides several key features:
-
Multi-Datacenter - Consul is built to be datacenter aware, and can support any number of regions without complex configuration.
-
Service Mesh/Service Segmentation - Consul Connect enables secure service-to-service communication with automatic TLS encryption and identity-based authorization. Applications can use sidecar proxies in a service mesh configuration to establish TLS connections for inbound and outbound connections without being aware of Connect at all.
-
Service Discovery - Consul makes it simple for services to register themselves and to discover other services via a DNS or HTTP interface. External services such as SaaS providers can be registered as well.
-
Health Checking - Health Checking enables Consul to quickly alert operators about any issues in a cluster. The integration with service discovery prevents routing traffic to unhealthy hosts and enables service level circuit breakers.
-
Key/Value Storage - A flexible key/value store enables storing dynamic configuration, feature flagging, coordination, leader election and more. The simple HTTP API makes it easy to use anywhere.
Consul runs on Linux, macOS, FreeBSD, Solaris, and Windows and includes an optional browser based UI. A commercial version called Consul Enterprise is also available.
Please note: We take Consul's security and our users' trust very seriously. If you believe you have found a security issue in Consul, please responsibly disclose by contacting us at security@hashicorp.com.
Quick Start
A few quick start guides are available on the Consul website:
- Standalone binary install: https://learn.hashicorp.com/tutorials/consul/get-started-install
- Minikube install: https://learn.hashicorp.com/tutorials/consul/kubernetes-minikube
- Kind install: https://learn.hashicorp.com/tutorials/consul/kubernetes-kind
- Kubernetes install: https://learn.hashicorp.com/tutorials/consul/kubernetes-deployment-guide
Documentation
Full, comprehensive documentation is available on the Consul website:
Contributing
Thank you for your interest in contributing! Please refer to CONTRIBUTING.md for guidance. For contributions specifically to the browser based UI, please refer to the UI's README.md for guidance.