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Add Google Vertex AI as provider to utilize Gemini via GCP
Signed-off-by: Mario Fahlandt <mfahlandt@pixel-haufen.de>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,178 @@ | ||
| /* | ||
| Copyright 2023 The K8sGPT Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package ai | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
|
|
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| "cloud.google.com/go/vertexai/genai" | ||
| "github.com/fatih/color" | ||
| ) | ||
|
|
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| const googleVertexAIClientName = "googlevertexai" | ||
|
|
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| type GoogleVertexAIClient struct { | ||
| client *genai.Client | ||
|
|
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| model string | ||
| temperature float32 | ||
| topP float32 | ||
| maxTokens int | ||
| } | ||
|
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| // Vertex AI Gemini supported Regions | ||
| // https://cloud.google.com/vertex-ai/docs/generative-ai/model-reference/gemini | ||
| const VERTEXAI_DEFAULT_REGION = "us-central1" // default use us-east-1 region | ||
|
|
||
| const ( | ||
| US_Central_1 = "us-central1" | ||
| US_West_4 = "us-west4" | ||
| North_America_Northeast1 = "northamerica-northeast1" | ||
| US_East_4 = "us-east4" | ||
| US_West_1 = "us-west1" | ||
| Asia_Northeast_3 = "asia-northeast3" | ||
| Asia_Southeast_1 = "asia-southeast1" | ||
| Asia_Northeast_1 = "asia-northeast1" | ||
| ) | ||
|
|
||
| var VERTEXAI_SUPPORTED_REGION = []string{ | ||
| US_Central_1, | ||
| US_West_4, | ||
| North_America_Northeast1, | ||
| US_East_4, | ||
| US_West_1, | ||
| Asia_Northeast_3, | ||
| Asia_Southeast_1, | ||
| Asia_Northeast_1, | ||
| } | ||
|
|
||
| const ( | ||
| ModelGeminiProV1 = "gemini-1.0-pro-001" | ||
| ) | ||
|
|
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| var VERTEXAI_MODELS = []string{ | ||
| ModelGeminiProV1, | ||
| } | ||
|
|
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| // GetModelOrDefault check config model | ||
| func GetVertexAIModelOrDefault(model string) string { | ||
|
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| // Check if the provided model is in the list | ||
| for _, m := range VERTEXAI_MODELS { | ||
| if m == model { | ||
| return model // Return the provided model | ||
| } | ||
| } | ||
|
|
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| // Return the default model if the provided model is not in the list | ||
| return VERTEXAI_MODELS[0] | ||
| } | ||
|
|
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| // GetModelOrDefault check config region | ||
| func GetVertexAIRegionOrDefault(region string) string { | ||
|
|
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| // Check if the provided model is in the list | ||
| for _, m := range VERTEXAI_SUPPORTED_REGION { | ||
| if m == region { | ||
| return region // Return the provided model | ||
| } | ||
| } | ||
|
|
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| // Return the default model if the provided model is not in the list | ||
| return VERTEXAI_DEFAULT_REGION | ||
| } | ||
|
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| func (g *GoogleVertexAIClient) Configure(config IAIConfig) error { | ||
| ctx := context.Background() | ||
|
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| // Currently you can access VertexAI either by being authenticated via OAuth or Bearer token so we need to consider both | ||
| projectId := config.GetProviderId() | ||
| region := GetVertexAIRegionOrDefault(config.GetProviderRegion()) | ||
|
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| client, err := genai.NewClient(ctx, projectId, region) | ||
| if err != nil { | ||
| return fmt.Errorf("creating genai Google SDK client: %w", err) | ||
| } | ||
|
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| g.client = client | ||
| g.model = GetVertexAIModelOrDefault(config.GetModel()) | ||
| g.temperature = config.GetTemperature() | ||
| g.topP = config.GetTopP() | ||
| g.maxTokens = config.GetMaxTokens() | ||
|
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| return nil | ||
| } | ||
|
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| func (g *GoogleVertexAIClient) GetCompletion(ctx context.Context, prompt string) (string, error) { | ||
|
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| model := g.client.GenerativeModel(g.model) | ||
| model.SetTemperature(g.temperature) | ||
| model.SetTopP(g.topP) | ||
| model.SetMaxOutputTokens(int32(g.maxTokens)) | ||
|
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| // Google AI SDK is capable of different inputs than just text, for now set explicit text prompt type. | ||
| // Similarly, we could stream the response. For now k8sgpt does not support streaming. | ||
| resp, err := model.GenerateContent(ctx, genai.Text(prompt)) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| if len(resp.Candidates) == 0 { | ||
| if resp.PromptFeedback.BlockReason > 0 { | ||
| for _, r := range resp.PromptFeedback.SafetyRatings { | ||
| if !r.Blocked { | ||
| continue | ||
| } | ||
| return "", fmt.Errorf("complection blocked due to %v with probability %v", r.Category.String(), r.Probability.String()) | ||
| } | ||
| } | ||
| return "", errors.New("no complection returned; unknown reason") | ||
| } | ||
|
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| // Format output. | ||
| // TODO(bwplotka): Provider richer output in certain cases e.g. suddenly finished | ||
| // completion based on finish reasons or safety rankings. | ||
| got := resp.Candidates[0] | ||
| var output string | ||
| for _, part := range got.Content.Parts { | ||
| switch o := part.(type) { | ||
| case genai.Text: | ||
| output += string(o) | ||
| output += "\n" | ||
| default: | ||
| color.Yellow("found unsupported AI response part of type %T; ignoring", part) | ||
| } | ||
| } | ||
|
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| if got.CitationMetadata != nil && len(got.CitationMetadata.Citations) > 0 { | ||
| output += "Citations:\n" | ||
| for _, source := range got.CitationMetadata.Citations { | ||
| // TODO(bwplotka): Give details around what exactly words could be attributed to the citation. | ||
| output += fmt.Sprintf("* %s, %s\n", source.URI, source.License) | ||
| } | ||
| } | ||
| return output, nil | ||
| } | ||
|
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| func (g *GoogleVertexAIClient) GetName() string { | ||
| return googleVertexAIClientName | ||
| } | ||
|
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| func (g *GoogleVertexAIClient) Close() { | ||
| if err := g.client.Close(); err != nil { | ||
| color.Red("googleai client close error: %v", err) | ||
| } | ||
| } |
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