feat: upgrade langflow version and add 'endpoint' to downloaded flows

.github/workflows/ci.yaml

@@ -8,6 +8,10 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   lint-test:
     runs-on: ubuntu-latest
@@ -40,15 +44,15 @@ jobs:
 
       - name: Run chart-testing (lint)
         if: steps.list-changed.outputs.changed == 'true'
-        run: ct lint --debug --target-branch main
+        run: ct lint --debug --target-branch main --validate-yaml false
 
       - name: Create kind cluster
         if: steps.list-changed.outputs.changed == 'true'
         uses: helm/[email protected]
 
       - name: Run chart-testing (install)
         if: steps.list-changed.outputs.changed == 'true'
-        run: ct install --debug --target-branch main
+        run: ct install --debug --target-branch main --chart-repos bitnami=https://charts.bitnami.com/bitnami
 
   release:
     needs: lint-test

charts/langflow-ide/Chart.yaml

@@ -2,9 +2,11 @@ apiVersion: v2
 name: langflow-ide
 description: Helm chart for Langflow IDE
 type: application
-version: 0.0.1
-appVersion: 1.0-alpha
-
+version: 0.1.0
+appVersion: latest
+maintainers:
+  - name: Langflow
+    email: [email protected]
 dependencies:
   - name: postgresql
     version: 15.x

charts/langflow-ide/values.yaml

@@ -26,8 +26,8 @@ ingress:
   #    hosts:
   #      - chart-example.local
 
-langflow: 
-  global: 
+langflow:
+  global:
     image:
       pullPolicy: IfNotPresent
       tag: ""
@@ -127,8 +127,6 @@ langflow:
         #     kind: Managed
         #     cachingmode: ReadOnly
         storageClass: {}
-
-
 
   frontend:
     enabled: true
@@ -171,4 +169,4 @@ secretProvider:
   enabled: false
 
 postgresql:
-  enabled: false
+  enabled: false

charts/langflow-runtime/Chart.yaml

@@ -2,5 +2,8 @@ apiVersion: v2
 name: langflow-runtime
 description: A helm chart for running LangFlow flows as a service
 type: application
-version: 0.0.1
-appVersion: "1.0-alpha"
+version: 0.1.0
+appVersion: latest
+maintainers:
+  - name: Langflow
+    email: [email protected]

charts/langflow-runtime/README.md

@@ -1,6 +1,6 @@
-# LangFlow runtime chart
+# Langflow runtime chart
 
-Deploy LangFlow flows to Kubernetes with this Helm chart.
+Deploy Langflow flows to Kubernetes with this Helm chart.
 Using a dedicated deployment for a set of flows is fundamental in production environments in order to have a granular resource control.
 
 
@@ -13,26 +13,49 @@ There are two ways to import a flow:
 ```yaml
 downloadFlows:
   flows:
-    - url: https://raw.githubusercontent.com/langflow-ai/langflow/dev/tests/data/BasicChatwithPromptandHistory.json
-#      basicAuth: "myuser:mypassword"
-#      headers:
-#        Authorization: "Bearer my-key"
+    - url: https://raw.githubusercontent.com/datastax/langflow-charts/main/examples/flows/basic-prompting-hello-world.json
+      endpoint: hello-world
 ```
 
 2. **Packaging the flow as docker image**: You can add a flow from to a docker image based on Langflow runtime and refer to it in the chart.
    See an example in the `apps` directory.
 
 ## Deploy the flow
 
-Install the chart (using option 1):
+Since the basic prompting needs an OpenAI Key, we need to create a secret with the key:
+```
+kubectl create secret generic langflow-secrets --from-literal=openai-key=sk-xxxx
+```
+This command will create a secret named `langflow-secrets` with the key `openai-key` containing your secret value.
+
+We need to create a custom `values.yaml` file to:
+1. Refer to the flow we want to deploy
+2. Plug the secret we created to the Langflow deployment
+
+(custom-values.yaml)
+```yaml
+downloadFlows:
+  flows:
+  - url: https://raw.githubusercontent.com/datastax/langflow-charts/main/examples/flows/basic-prompting-hello-world.json
+    endpoint: hello-world
+
+env:
+  - name: LANGFLOW_LOG_LEVEL
+    value: "INFO"
+  - name: OPENAI_API_KEY
+    valueFrom:
+      secretKeyRef:
+        name: langflow-secrets
+        key: openai-key
+```
+See the full file at [basic-prompting-hello-world.yaml](https://raw.githubusercontent.com/datastax/langflow-charts/main/examples/flows/langflow-runtime/basic-prompting-hello-world.yaml)
+
+Now we can deploy the chart (using option 1):
 
 ```bash
 helm repo add langflow https://langflow-ai.github.io/langflow-helm-charts
 helm repo update
-helm install langflow-runtime langflow/langflow-runtime \
-    --set "downloadFlows.flows[0].uuid=4ca07770-c0e4-487c-ad42-77c6039ce02e" \
-    --set "downloadFlows.flows[0].url=https://raw.githubusercontent.com/datastax/langflow-charts/main/examples/langflow-runtime/just-chat/justchat.json" \
-    --set replicaCount=1
+helm install langflow-runtime langflow/langflow-runtime --values custom-values.yaml
 ```
 
 Tunnel the service to localhost:
@@ -41,22 +64,66 @@ Tunnel the service to localhost:
 kubectl port-forward svc/langflow-langflow-runtime 7860:7860
 ```
 
-Call the flow API endpoint:
+Call the flow API endpoint using `hello-world` as flow name:
 ```bash
 curl -X POST \
-    "http://localhost:7860/api/v1/run/4ca07770-c0e4-487c-ad42-77c6039ce02e?stream=false" \
+    "http://localhost:7860/api/v1/run/hello-world?stream=false" \
     -H 'Content-Type: application/json'\
     -d '{
-      "input_value": "message",
+      "input_value": "Hello there!",
       "output_type": "chat",
-      "input_type": "chat",
-      "tweaks": {
-          "ChatInput-1BPcY": {},
-          "ChatOutput-J1bsS": {}
-      }
+      "input_type": "chat"
     }'
 ```
 
+
+## Upgrade Langflow version
+To change the Langflow version or use a custom docker image, you can modify the `image` parameter in the chart.
+
+```yaml
+image:
+  repository: "langflowai/langflow-backend"
+  tag: 1.x.y
+```
+
+## Download flows options
+The `downloadFlows` section in the `values.yaml` file allows you to download flows from remote locations.
+You can specify the following options:
+* `url`: The URL of the flow. Must point to a JSON file.
+* `endpoint`: Override the endpoint of the flow. By default, the endpoint is the UUID of the flow or anything you set in the flow (`endpoint_name` key).
+* `uuid`: Override the UUID of the flow. If not specified, the UUID will be extracted from the flow file.
+* `basicAuth`: Basic authentication credentials in the form `username:password`.
+* `headers`: Custom headers to add to the request. For example, to add Authorization header for downloading from private repositories.
+
+## Langflow secrets
+The `env` section in the `values.yaml` file allows you to set environment variables for the Langflow deployment.
+The recommended way to set sensitive information is to use Kubernetes secrets.
+You can reference a secret in the `values.yaml` file by using the `valueFrom` key.
+
+```yaml
+env:
+  - name: OPENAI_API_KEY
+    valueFrom:
+      secretKeyRef:
+        name: langflow-secrets
+        key: openai-key
+  - name: ASTRA_DB_APPLICATION_TOKEN
+    valueFrom:
+      secretKeyRef:
+        name: langflow-secrets
+        key: astra-token
+```
+where:
+* `name`: refer to the environment variable name used by your flow.
+* `valueFrom.secretKeyRef.name`: refers to the kubernetes secret name.
+* `valueFrom.secretKeyRef.key`: refers to the key in the secret.
+For example, to create a matching secret with the above example you can use the following command:
+
+```
+kubectl create secret generic langflow-secrets --from-literal=openai-key=sk-xxxx --from-literal=astra-token=AstraCS:xxx
+```
+
+
 ## Scale the flows
 
 In order to add more resources to the flows container, you could decide to scale:
@@ -68,12 +135,11 @@ In order to add more resources to the flows container, you could decide to scale
 
 To scale horizontally you only need to modify the `replicaCount` parameter in the chart.
 
-```yaml
-helm install langflow-runtime langflow/langflow-runtime \
-    --set "downloadFlows.flows[0].uuid=4ca07770-c0e4-487c-ad42-77c6039ce02e" \
-    --set "downloadFlows.flows[0].url=https://raw.githubusercontent.com/datastax/langflow-charts/main/examples/langflow-runtime/just-chat/justchat.json" \
-    --set replicaCount=5
 ```
+replicaCount: 5
+```
+
+Please note that if your flow relies on shared state (e.g. builtin chat memory), you will need to setup a shared database.
 
 ### Scale vertically
 
@@ -89,13 +155,3 @@ resources:
     cpu: 100m
     memory: 128Mi
 ```
-
-
-To scale vertically you only need modify the `resources`
-
-```
-helm install langflow-runtime langflow/langflow-runtime \
-    --set "downloadFlows.flows[0].uuid=4ca07770-c0e4-487c-ad42-77c6039ce02e" \
-    --set "downloadFlows.flows[0].url=https://raw.githubusercontent.com/datastax/langflow-charts/main/examples/langflow-runtime/just-chat/justchat.json" \
-    --set replicaCount=5
-```

charts/langflow-runtime/templates/deployment.yaml

@@ -54,8 +54,9 @@ spec:
               set -e &&
               mkdir -p {{ .Values.downloadFlows.path }} &&
               {{- range .Values.downloadFlows.flows }}
-              echo "Downloading flows from {{ .url }}" &&
-              curl --fail -o {{ $.Values.downloadFlows.path }}/{{ .uuid | default (.url | sha256sum | trunc 8) }}.json \
+              {{- $targetFile := printf "%s/%s.json" $.Values.downloadFlows.path (.uuid | default (.url | sha256sum | trunc 8)) -}}
+              echo "Downloading flows from {{ .url }} to {{ $targetFile }}" &&
+              curl --fail -o '{{ $targetFile }}' \
                 {{- if .basicAuth }}
                 -u "{{ .basicAuth }}" \
                 {{- end }}
@@ -64,7 +65,10 @@ spec:
                 -H "{{ $key }}: {{ $value }}" \
                 {{- end }}
                 {{- end }}
-                {{ .url }} &&
+                '{{ .url }}' && 
+              {{- if .endpoint }}
+              python -c 'import json, sys;f = sys.argv[1]; data = json.load(open(f));data["endpoint_name"]="{{ .endpoint }}";json.dump(data, open(f, "w"))' '{{ $targetFile }}' &&
+              {{- end }}
               {{- end }}
               echo 'Flows downloaded' && 
               langflow run --backend-only --host 0.0.0.0 --port {{ .Values.service.port }}

charts/langflow-runtime/values.yaml

@@ -44,10 +44,10 @@ securityContext: {}
 env:
   - name: LANGFLOW_LOG_LEVEL
     value: "INFO"
-#  - name: openai_key_var
+#  - name: OPENAI_API_KEY
 #    valueFrom:
 #      secretKeyRef:
-#        name: openai-key
+#        name: langflow-secrets
 #        key: openai-key
 
 
@@ -108,4 +108,4 @@ nodeSelector: {}
 
 tolerations: []
 
-affinity: {}
+affinity: {}