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Backend Plugins: Collect and expose metrics and plugin process health check (#21481)

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Adds support for collecting metrics from backend plugins and 
exposing them thru Grafana's Prometheus metrics endpoint. 
Enables to check health of backend plugin by using the route
`/api/plugins/<plugin id>/health`.
Uses sdk v0.6.0.

Closes #20984
This commit is contained in:
Marcus Efraimsson
2020-01-15 13:10:48 +01:00
committed by GitHub
parent f56f54b1a3
commit 5c711bfb79
34 changed files with 2406 additions and 623 deletions
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17
pkg/plugins/backendplugin/client.go
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@ -8,7 +8,6 @@ import (
datasourceV1 "github.com/grafana/grafana-plugin-model/go/datasource"
rendererV1 "github.com/grafana/grafana-plugin-model/go/renderer"
backend "github.com/grafana/grafana-plugin-sdk-go/backend"
sdk "github.com/grafana/grafana-plugin-sdk-go/common"
"github.com/hashicorp/go-plugin"
)
@ -27,8 +26,8 @@ var handshake = plugin.HandshakeConfig{
ProtocolVersion: DefaultProtocolVersion,
// The magic cookie values should NEVER be changed.
MagicCookieKey: sdk.MagicCookieKey,
MagicCookieValue: sdk.MagicCookieValue,
MagicCookieKey: backend.MagicCookieKey,
MagicCookieValue: backend.MagicCookieValue,
}
func newClientConfig(executablePath string, logger log.Logger, versionedPlugins map[int]plugin.PluginSet) *plugin.ClientConfig {
@ -73,9 +72,10 @@ func NewBackendPluginDescriptor(pluginID, executablePath string, startFns Plugin
DefaultProtocolVersion: {
pluginID: &datasourceV1.DatasourcePluginImpl{},
},
sdk.ProtocolVersion: {
"backend": &backend.CoreGRPCPlugin{},
"transform": &backend.TransformGRPCPlugin{},
backend.ProtocolVersion: {
"diagnostics": &backend.DiagnosticsGRPCPlugin{},
"backend": &backend.CoreGRPCPlugin{},
"transform": &backend.TransformGRPCPlugin{},
},
},
startFns: startFns,
@ -106,6 +106,7 @@ type LegacyClient struct {
// Client client for communicating with a plugin using the current plugin protocol.
type Client struct {
BackendPlugin backend.BackendPlugin
TransformPlugin backend.TransformPlugin
DiagnosticsPlugin backend.DiagnosticsPlugin
BackendPlugin backend.BackendPlugin
TransformPlugin backend.TransformPlugin
}