【云原生】K8sGPT + LocalAI 开源自动化诊断工具（GPT4All-j模型）

k8sgpt官方文档：In-Cluster Operator - k8sgpt

localai官方文档：Run with Kubernetes | LocalAI documentation

参考文献：K8sGPT + LocalAI: Unlock Kubernetes superpowers for free! | by Tyler | ITNEXT

安装LocalAI

可选一：（kubectl方式）

cat > local-ai.yaml << EOF
apiVersion: v1
kind: Namespace
metadata:
  name: local-ai
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: models-pvc
  namespace: local-ai
spec:
  storageClassName: nfs-storage # 实际的storageclass
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: local-ai
  namespace: local-ai
  labels:
    app: local-ai
spec:
  selector:
    matchLabels:
      app: local-ai
  replicas: 1
  template:
    metadata:
      labels:
        app: local-ai
      name: local-ai
    spec:
      containers:
        - env:
          - name: DEBUG
            value: "true"
          name: local-ai
          #image: quay.io/go-skynet/local-ai:latest
          image: quay.io/go-skynet/local-ai:master-ffmpeg-core
          imagePullPolicy: IfNotPresent
          volumeMounts:
            - name: models-volume
              mountPath: /build/models
      volumes:
        - name: models-volume
          persistentVolumeClaim:
            claimName: models-pvc
---
apiVersion: v1
kind: Service
metadata:
  name: local-ai
  namespace: local-ai
spec:
  selector:
    app: local-ai
  type: LoadBalancer
  ports:
    - protocol: TCP
      port: 8080
      targetPort: 8080
EOF

1	kubectl apply -f local-ai.yaml

可选二：（helm方式）

1 2	helm repo add go-skynet https://go-skynet.github.io/helm-charts/ helm show values go-skynet/local-ai > values.yaml

1	vim values.yaml


replicaCount: 1

deployment:
  image:
    repository: quay.io/go-skynet/local-ai
    tag: latest    # latest镜像23.5G
    # tag: master-ffmpeg-core
  env:
    threads: 8  # 最好8cpu
    context_size: 512
  modelsPath: "/models"
  download_model:
    image: busybox
  prompt_templates:
    image: busybox
  pullPolicy: IfNotPresent
  imagePullSecrets: []
resources: {}
promptTemplates: {}
models:
  forceDownload: false
  list:
    - url: "https://gpt4all.io/models/ggml-gpt4all-j.bin" # 提前下载，放到models的pvc里
      # basicAuth: base64EncodedCredentials
initContainers: []
sidecarContainers: []
persistence:
  models: 
    enabled: true
    annotations: {}
    storageClass: nfs-storage # 实际的storageclassName
    accessModes: ReadWriteMany
    size: 10Gi
    globalMount: /models
  output:
    enabled: true
    annotations: {}
    storageClass: nfs-storage # 实际的storageclassName
    accessModes: ReadWriteMany
    size: 5Gi
    globalMount: /tmp/generated
service:
  type: ClusterIP
  port: 80
  annotations: {}
ingress:
  enabled: false
  className: ""
  annotations: {}
  hosts:
    - host: chart-example.local
      paths:
        - path: /
          pathType: ImplementationSpecific
  tls: []
  #  - secretName: chart-example-tls
  #    hosts:
  #      - chart-example.local
nodeSelector: {}
tolerations: []
affinity: {}

1	helm install local-ai go-skynet/local-ai -f values.yaml

下载模型

GPT4all-j下载地址（3.52G）：https://gpt4all.io/models/ggml-gpt4all-j.bin

下载后安装到models的pvc下

测试LocalAI GPT4All模型

1	curl http://10.20.13.140:27410/v1/models

curl http://10.20.13.140:27410/v1/chat/completions -H "Content-Type: application/json" -d '{
  "model": "ggml-gpt4all-j.bin",
  "messages": [{"role": "user", "content": "How are you?"}],
  "temperature": 0.7
}'

安装k8sgpt客户端，诊断集群

下载地址：Installation - k8sgpt

1	rpm -ivh -i k8sgpt_amd64.rpm

1	k8sgpt auth add --backend localai --model ggml-gpt4all-j.bin --baseurl http://10.20.13.140:27410/v1

1	k8sgpt analyze --explain -b localai # 如果这一步卡住，很可能你的资源问题不能被确认

1	k8sgpt analyze --explain -b localai --filter Pod # 只过滤Pod

资源使用问题

查看local-ai的pod在node01节点，如果正在运算可以看到top使用率

集成k8sgpt-operator配置自动诊断

安装k8sgpt-operator

1
2
3

helm repo add k8sgpt https://charts.k8sgpt.ai/
helm repo update
helm install release k8sgpt/k8sgpt-operator -n k8sgpt-operator-system --create-namespace

创建K8sGPT

1	vim k8sgpt.yaml


apiVersion: core.k8sgpt.ai/v1alpha1
kind: K8sGPT
metadata:
  name: k8sgpt-local
  namespace: k8sgpt-operator-system
spec:
  ai:
    enabled: true
    backend: localai
    model: ggml-gpt4all-j.bin
    baseUrl: http://local-ai.local-ai.svc.cluster.local:8080/v1
  noCache: false
  version: v0.3.8

1	kubectl apply -f k8sgpt.yaml

测试自动诊断

创建一个错误的pod，镜像tag故意写一个不存在的


cat > broken-pod.yaml << EOF
apiVersion: v1
kind: Pod
metadata:
  name: broken-pod
spec:
  containers:
    - name: broken-pod
      image: nginx:1.a.b.c
      livenessProbe:
        httpGet:
          path: /
          port: 90
        initialDelaySeconds: 3
        periodSeconds: 3
EOF