DnsProvider - service-discovery-plugin/src/index.ts

class DnsProvider

Since 0.2.0

Resolves services through DNS.

Constructors



DnsProvider(resolver: IDnsResolver,
runtime: IRuntimeServices,
options: DnsProviderOptions
)

Parameters



resolver: IDnsResolver

The DNS resolver from IRuntimeServices.dns



runtime: IRuntimeServices

Supplies timers for the poll



options: DnsProviderOptions

Mode, template, port, and poll interval

readonly



kind: string

Backend id.



domainFor(serviceName: string): string

Substitutes the service name into the configured template.



resolve(serviceName: string): Promise<readonly ServiceInstance[]>

Reads the current instance list for a service.



watch(serviceName: string,
listener: (instances: readonly ServiceInstance[]) => void
): Promise<Unsubscribe>

Polls at watchIntervalMs, firing only when the instance list changed.

DNS has no push channel. Polling is the honest implementation: a watch() that never fires would be worse than a documented interval.