52 lines
2.0 KiB
Go
52 lines
2.0 KiB
Go
package envoyextensions
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import (
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"fmt"
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awslambda "github.com/hashicorp/consul/agent/envoyextensions/builtin/aws-lambda"
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"github.com/hashicorp/consul/agent/envoyextensions/builtin/http/localratelimit"
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"github.com/hashicorp/consul/agent/envoyextensions/builtin/lua"
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"github.com/hashicorp/consul/api"
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"github.com/hashicorp/consul/envoyextensions/extensioncommon"
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"github.com/hashicorp/go-multierror"
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)
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type extensionConstructor func(api.EnvoyExtension) (extensioncommon.EnvoyExtender, error)
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var extensionConstructors = map[string]extensionConstructor{
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api.BuiltinLuaExtension: lua.Constructor,
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api.BuiltinAWSLambdaExtension: awslambda.Constructor,
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api.BuiltinLocalRatelimitExtension: localratelimit.Constructor,
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}
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// ConstructExtension attempts to lookup and build an extension from the registry with the
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// given config. Returns an error if the extension does not exist, or if the extension fails
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// to be constructed properly.
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func ConstructExtension(ext api.EnvoyExtension) (extensioncommon.EnvoyExtender, error) {
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constructor, ok := extensionConstructors[ext.Name]
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if !ok {
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return nil, fmt.Errorf("name %q is not a built-in extension", ext.Name)
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}
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return constructor(ext)
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}
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// ValidateExtensions will attempt to construct each instance of the given envoy extension configurations
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// and returns an error if any fail to build. Note that this step is separated from the xds package and
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// does not check any potential runtime configuration that the extension could encounter -- it simply
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// ensures that the extension can be built from the given arguments.
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func ValidateExtensions(extensions []api.EnvoyExtension) error {
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var output error
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for i, ext := range extensions {
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if ext.Name == "" {
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output = multierror.Append(output, fmt.Errorf("invalid EnvoyExtensions[%d]: Name is required", i))
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continue
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}
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_, err := ConstructExtension(ext)
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if err != nil {
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output = multierror.Append(output, fmt.Errorf("invalid EnvoyExtensions[%d][%s]: %w", i, ext.Name, err))
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continue
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}
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}
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return output
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}
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