mirror of https://github.com/hashicorp/consul
43 lines
1.8 KiB
Go
43 lines
1.8 KiB
Go
// Package proxy contains logic for agent interaction with proxies,
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// primarily "managed" proxies. Managed proxies are proxy processes for
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// Connect-compatible endpoints that Consul owns and controls the lifecycle
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// for.
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//
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// This package does not contain the built-in proxy for Connect. The source
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// for that is available in the "connect/proxy" package.
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package proxy
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// EnvProxyToken is the name of the environment variable that is passed
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// to managed proxies containing the proxy token.
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const EnvProxyToken = "CONNECT_PROXY_TOKEN"
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// Proxy is the interface implemented by all types of managed proxies.
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//
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// Calls to all the functions on this interface must be concurrency safe.
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// Please read the documentation carefully on top of each function for expected
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// behavior.
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type Proxy interface {
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// Start starts the proxy. If an error is returned then the managed
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// proxy registration is rejected. Therefore, this should only fail if
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// the configuration of the proxy itself is irrecoverable, and should
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// retry starting for other failures.
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//
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// Starting an already-started proxy should not return an error.
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Start() error
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// Stop stops the proxy and disallows it from ever being started again.
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//
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// If the proxy is not started yet, this should not return an error, but
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// it should disallow Start from working again. If the proxy is already
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// stopped, this should not return an error.
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Stop() error
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// Equal returns true if the argument is equal to the proxy being called.
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// This is called by the manager to determine if a change in configuration
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// results in a proxy that needs to be restarted or not. If Equal returns
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// false, then the manager will stop the old proxy and start the new one.
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// If Equal returns true, the old proxy will remain running and the new
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// one will be ignored.
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Equal(Proxy) bool
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}
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