@microfleet/plugin-consul v5.1.3
Microfleet Consul Plugin
Adds consul support to microfleet. This can be used to perform service discovery, leader election and other related tasks Read more about Consul at https://www.consul.io
Install
yarn add @microfleet/plugin-consul
Configuration
To make use of the plugin adjust microfleet configuration in the following way:
exports.plugins = [
...,
'consul',
...
]
/* this section is optional */
exports.consul = {
base: {
host?: string; // consul-agent host instance
port?: string; // consul-agent port
secure?: boolean; // https?
ca?: string[]; // custom CA
defaults?: { // used for all queries to consul
consistent?: boolean;
dc?: string;
stale?: boolean;
token?: string;
wait?: string;
wan?: boolean;
timeout?: number;
}
},
lock: {
key?: string; // defaults `microfleet/${config.name}/leader`,
session?: Object | string; // session settings
value?: string | Buffer; // arbitrary data
lockwaittime?: string;
lockretrytime?: string;
}
}
Interface
Microfleet Consul Plugin extends service interface with the following methods:
service.consul: consul.Consul
Initialized instance. Look at the docs here - https://www.npmjs.com/package/consul#documentation
service.consulLeader: consul.Lock
Initialized leader election lock. Detailed docs here - https://www.npmjs.com/package/consul#lock
service.whenLeader(): Promise
Use this to wait until current instance becomes a leader.
// will lock until instance is a leader
// or until service.close() is called
const isLeader = await service.whenLeader()
if (isLeader === true) {
... // means we've acquired leader
} else {
... // this means that instance is closing down
}
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