From 847c181ec9b73e51daf39efc5c597eff2e7cdb31 Mon Sep 17 00:00:00 2001 From: Jesse Hallam Date: Wed, 23 May 2018 14:26:35 -0400 Subject: MM-8622: Improved plugin error reporting (#8737) * allow `Wait()`ing on the supervisor In the event the plugin supervisor shuts down a plugin for crashing too many times, the new `Wait()` interface allows the `ActivatePlugin` to accept a callback function to trigger when `supervisor.Wait()` returns. If the supervisor shuts down normally, this callback is invoked with a nil error, otherwise any error reported by the supervisor is passed along. * improve plugin activation/deactivation logic Avoid triggering activation of previously failed-to-start plugins just becase something in the configuration changed. Now, intelligently compare the global enable bit as well as the each individual plugin's enabled bit. * expose store to manipulate PluginStatuses * expose API to fetch plugin statuses * keep track of whether or not plugin sandboxing is supported * transition plugin statuses * restore error on plugin activation if already active * don't initialize test plugins until successfully loaded * emit websocket events when plugin statuses change * skip pruning if already initialized * MM-8622: maintain plugin statuses in memory Switch away from persisting plugin statuses to the database, and maintain in memory instead. This will be followed by a cluster interface to query the in-memory status of plugin statuses from all cluster nodes. At the same time, rename `cluster_discovery_id` on the `PluginStatus` model object to `cluster_id`. * MM-8622: aggregate plugin statuses across cluster * fetch cluster plugin statuses when emitting websocket notification * address unit test fixes after rebasing * relax (poor) racey unit test re: supervisor.Wait() * make store-mocks --- plugin/pluginenv/environment.go | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'plugin/pluginenv/environment.go') diff --git a/plugin/pluginenv/environment.go b/plugin/pluginenv/environment.go index 947eda86d..f704aa5bb 100644 --- a/plugin/pluginenv/environment.go +++ b/plugin/pluginenv/environment.go @@ -108,7 +108,7 @@ func (env *Environment) IsPluginActive(pluginId string) bool { } // Activates the plugin with the given id. -func (env *Environment) ActivatePlugin(id string) error { +func (env *Environment) ActivatePlugin(id string, onError func(error)) error { env.mutex.Lock() defer env.mutex.Unlock() @@ -117,7 +117,7 @@ func (env *Environment) ActivatePlugin(id string) error { } if _, ok := env.activePlugins[id]; ok { - return nil + return fmt.Errorf("plugin already active: %v", id) } plugins, err := ScanSearchPath(env.searchPath) if err != nil { @@ -156,6 +156,14 @@ func (env *Environment) ActivatePlugin(id string) error { if err := supervisor.Start(api); err != nil { return errors.Wrapf(err, "unable to start plugin: %v", id) } + if onError != nil { + go func() { + err := supervisor.Wait() + if err != nil { + onError(err) + } + }() + } activePlugin.Supervisor = supervisor } -- cgit v1.2.3-1-g7c22