226a5d3db4
When the agent is triggered to shutdown via an external 'consul leave' command delivered via the HTTP API then the client expects to receive a response when the agent is down. This creates a race on when to shutdown the agent itself like the RPC server, the checks and the state and the external endpoints like DNS and HTTP. Ideally, the external endpoints should be shutdown before the internal state but if the goal is to respond reliably that the agent is down then this is not possible. This patch splits the agent shutdown into two parts implemented in a single method to keep it simple and unambiguos for the caller. The first stage shuts down the internal state, checks, RPC server, ... synchronously and then triggers the shutdown of the external endpoints asychronously. This way the caller is guaranteed that the internal state services are down when Shutdown returns and there remains enough time to send a response. Fixes #2880 |
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|---|---|---|
| acl | ||
| agent | ||
| api | ||
| bench | ||
| command | ||
| contrib | ||
| demo/vagrant-cluster | ||
| ipaddr | ||
| lib | ||
| logger | ||
| scripts | ||
| snapshot | ||
| terraform | ||
| test | ||
| testrpc | ||
| testutil | ||
| tlsutil | ||
| types | ||
| ui | ||
| vendor | ||
| version | ||
| watch | ||
| website | ||
| .gitattributes | ||
| .gitignore | ||
| .travis.yml | ||
| CHANGELOG.md | ||
| GNUmakefile | ||
| ISSUE_TEMPLATE.md | ||
| LICENSE | ||
| main.go | ||
| main_test.go | ||
| README.md | ||
Consul 
- Website: https://www.consul.io
- Chat: Gitter
- Mailing list: Google Groups
Consul is a tool for service discovery and configuration. Consul is distributed, highly available, and extremely scalable.
Consul provides several key features:
-
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.
-
Multi-Datacenter - Consul is built to be datacenter aware, and can support any number of regions without complex configuration.
Consul runs on Linux, Mac OS X, FreeBSD, Solaris, and Windows.
Quick Start
An extensive quick start is viewable on the Consul website:
https://www.consul.io/intro/getting-started/install.html
Documentation
Full, comprehensive documentation is viewable on the Consul website:
Developing Consul
If you wish to work on Consul itself, you'll first need Go installed (version 1.8+ is required). Make sure you have Go properly installed, including setting up your GOPATH.
Next, clone this repository into $GOPATH/src/github.com/hashicorp/consul and
then just type make. In a few moments, you'll have a working consul executable:
$ make
...
$ bin/consul
...
Note: make will build all os/architecture combinations. Set the environment variable CONSUL_DEV=1 to build it just for your local machine's os/architecture, or use make dev.
Note: make will also place a copy of the binary in the first part of your $GOPATH.
You can run tests by typing make test.
If you make any changes to the code, run make format in order to automatically
format the code according to Go standards.
Vendoring
Consul currently uses govendor for vendoring.