Langflow helm chart

ragstack/deploy/kubernetes/helm/langflow/.helmignore

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

ragstack/deploy/kubernetes/helm/langflow/Chart.yaml

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+apiVersion: v2
+name: langflow
+description: A Helm chart for Kubernetes
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.1.0
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+appVersion: 1.16.0
+
+dependencies:
+  - name: postgresql
+    version: 12.1.0
+    repository: https://charts.bitnami.com/bitnami
+    condition: postgresql.enabled

ragstack/deploy/kubernetes/helm/langflow/README.md

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+# helm chart
+
+This is the helm chart for RAGStack LangFlow. Postgres is a dependent chart but optional.
+
+## how to install
+
+```
+cd ragstack/deploy/kubernetes/helm
+
+helm dependency update ./langflow
+
+kubectl create namespace langflow
+
+helm install --dry-run langflow ./langflow --values ./langflow/values.yaml
+
+helm install --namespace langflow --debug langflow ./langflow --values ./langflow/values.yaml
+
+helm upgrade langflow ./langflow --values ./langflow/values.yaml --namespace langflow --debug
+```

ragstack/deploy/kubernetes/helm/langflow/templates/NOTES.txt

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+1. Get the application URL by running these commands:
+{{- if .Values.ingress.enabled }}
+{{- range $host := .Values.ingress.hosts }}
+  {{- range .paths }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ . }}
+  {{- end }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "langflow.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "langflow.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "langflow.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
+  echo http://$SERVICE_IP:{{ .Values.service.port }}
+{{- else if contains "ClusterIP" .Values.service.type }}
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "langflow.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT
+{{- end }}

ragstack/deploy/kubernetes/helm/langflow/templates/_helpers.tpl

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+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "langflow.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "langflow.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "langflow.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "langflow.labels" -}}
+helm.sh/chart: {{ include "langflow.chart" . }}
+{{ include "langflow.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "langflow.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "langflow.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "langflow.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "langflow.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

ragstack/deploy/kubernetes/helm/langflow/templates/backend-statefulset.yaml

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+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: {{ include "langflow.fullname" . }}
+  labels:
+    {{- include "langflow.labels" . | nindent 4 }}
+spec:
+  serviceName: "{{ include "langflow.fullname" . }}-service"
+  replicas: {{ .Values.langflow.replicaCount }}
+  selector:
+    matchLabels:
+      {{- include "langflow.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.langflow.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "langflow.selectorLabels" . | nindent 8 }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "langflow.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.langflow.podSecurityContext | nindent 8 }}
+      volumes:
+        {{- if .Values.enableTls }}
+        - name: certs
+          secret:
+            secretName: "{{ .Values.tlsSecretName }}"
+        {{- end }}
+        {{- if .Values.secretProvider.enabled }}
+        - name: secrets-store-inline
+          csi:
+            driver: secrets-store.csi.k8s.io
+            readOnly: true
+            volumeAttributes:
+              secretProviderClass: "{{- .Values.secretProvider.name }}"
+        {{- end }}
+      containers:
+        - name: {{ .Chart.Name }}
+          securityContext:
+            {{- toYaml .Values.langflow.securityContext | nindent 12 }}
+          image: "{{ .Values.langflow.image.repository }}:{{ .Values.langflow.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.langflow.image.pullPolicy }}
+          {{- if .Values.langflow.command }}
+          command:
+            {{- toYaml .Values.langflow.command | nindent 12 }}
+          {{- end }}
+          {{- if .Values.langflow.args }}
+          args:
+            {{- toYaml .Values.langflow.args | nindent 12 }}
+          {{- end }}
+          ports:
+            - name: http
+              containerPort: {{ .Values.langflow.backend.port | default 7860 }}
+              protocol: TCP
+          volumeMounts:
+            {{- if .Values.enableTls }}
+            - name: certs
+              readOnly: true
+              mountPath: /certs
+            {{- end }}
+            {{- if .Values.secretProvider.enabled }}
+            - name: secrets-store-inline
+              mountPath: "/mnt/secrets"
+              readOnly: true
+            {{- end }}
+            {{- if eq .Values.langflow.database.type "sqlite" }}
+            - name: data
+              mountPath: /data
+            {{- end }}
+          livenessProbe:
+            httpGet:
+              path: /health
+              port: {{ .Values.langflow.backend.port | default 7860 }}
+            initialDelaySeconds: {{ .Values.langflow.backend.initialDelaySeconds | default 60 }}
+            periodSeconds: {{ .Values.langflow.backend.periodSeconds | default 15 }}
+            timeoutSeconds: {{ .Values.langflow.backend.timeoutSeconds | default 5 }}
+            failureThreshold: {{ .Values.langflow.backend.failureThreshold | default 2 }}   
+          readinessProbe:
+            httpGet:
+              path: /health
+              port: {{ .Values.langflow.backend.port | default 7860 }}
+            initialDelaySeconds: {{ .Values.langflow.backend.initialDelaySeconds | default 45 }}
+            periodSeconds: {{ .Values.langflow.backend.periodSeconds | default 15 }}
+            timeoutSeconds: {{ .Values.langflow.backend.timeoutSeconds | default 5 }}
+            failureThreshold: {{ .Values.langflow.backend.failureThreshold | default 2 }}   
+          env:
+            - name: ENVIRONMENT 
+              value: "{{ .Values.environment | default "dev" }}"
+            - name: DOMAIN
+              value: "{{ .Values.domain | default "localhost" }}"
+            {{- if and .Values.langflow.database .Values.langflow.database.secretsEnabled }}
+            - name: LANGFLOW_DATABASE_URL
+              valueFrom:
+                secretKeyRef:
+                  name: db-sql-url
+                  key: db-sql-url.txt
+            {{- else if and .Values.langflow.database .Values.langflow.database.url }}
+              value: "{{ .Values.langflow.database.url }}"
+            {{- end }}
+            - name: LANGFLOW_HOST
+              value: "{{ .Values.langflow.host | default "0.0.0.0" }}"
+            - name: LANGFLOW_BACKEND_ONLY
+              value: "{{ .Values.langflow.backend.backendOnly | default false }}"
+          resources:
+            {{- toYaml .Values.langflow.resources | nindent 12 }}
+      {{- with .Values.langflow.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.langflow.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.langflow.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+  {{- if eq .Values.langflow.database.type "sqlite" }}
+  volumeClaimTemplates:
+  - metadata:
+      name: data
+    spec:
+      accessModes: [ "ReadWriteOnce" ]
+      resources:
+        requests:
+          storage: {{ .Values.langflow.database.size }}
+      storageClassName: "langflow-sqlite"
+  {{- end }}

ragstack/deploy/kubernetes/helm/langflow/templates/db-storageclass.yaml

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+{{- if .Values.langflow.database.type }}
+apiVersion: storage.k8s.io/v1
+kind: StorageClass
+metadata:
+  name: "{{ template "langflow.fullname" . }}-{{ .Values.langflow.database.type }}"
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app: {{ template "langflow.name" . }}
+    chart: {{ template "langflow.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+    component: {{ .Values.langflow.database.type }}
+    cluster: {{ template "langflow.fullname" . }}
+allowVolumeExpansion: true
+reclaimPolicy: Retain
+volumeBindingMode: WaitForFirstConsumer
+{{- if .Values.langflow.database.volumes.storageClass }}
+provisioner: {{ .Values.langflow.database.volumes.storageClass.provisioner }}
+parameters:
+  {{- if .Values.langflow.database.volumes.storageClass.type }}
+  type: {{ .Values.langflow.database.volumes.storageClass.type }}
+  {{- end }}
+  {{- if .Values.langflow.database.volumes.storageClass.fsType }}
+  fsType: {{ .Values.langflow.database.volumes.storageClass.fsType }}
+  {{- end }}
+  {{- if .Values.langflow.database.volumes.storageClass.extraParams }}
+{{ toYaml .Values.langflow.database.volumes.storageClass.extraParams | indent 2 }}
+  {{- end }}
+{{- else if .Values.default_storage }}
+provisioner: {{ .Values.default_storage.provisioner }}
+parameters:
+  {{- if .Values.default_storage.type }}
+  type: {{ .Values.default_storage.type }}
+  {{- end }}
+  {{- if .Values.default_storage.fsType }}
+  fsType: {{ .Values.default_storage.fsType }}
+  {{- end }}
+  {{- if .Values.default_storage.extraParams }}
+{{ toYaml .Values.default_storage.extraParams | indent 2 }}
+  {{- end }}
+{{- end }}
+{{- end }}