测试开发笔记

背景

最近想学习一下elasticsearch和fluentd的配合使用， fluentd比logstash节省太多资源了，所以就有了如下文章

Elasticsearch快捷安装(使用ECK方式)

参考文章

https://www.elastic.co/guide/en/cloud-on-k8s/1.8/k8s-deploy-eck.html

先安装一个eck的operator

kubectl create -f https://download.elastic.co/downloads/eck/1.8.0/crds.yaml
kubectl apply -f https://download.elastic.co/downloads/eck/1.8.0/operator.yaml

等命令介绍，输入下面命令查看日志

kubectl -n elastic-system logs -f statefulset.apps/elastic-operator

安装elasticsearch

cat <<EOF | kubectl apply -f -
apiVersion: elasticsearch.k8s.elastic.co/v1
kind: Elasticsearch
metadata:
  name: quickstart
spec:
  version: 7.15.2
  nodeSets:
  - name: default
    count: 1
    config:
      node.store.allow_mmap: false
EOF

安装完成后，输入命令，获得es的密码，默认账户是elastic

PASSWORD=$(kubectl get secret quickstart-es-elastic-user -o go-template='{{.data.elastic | base64decode}}')

部署完毕后，可以通过port-forward转发elasticsearch的端口到外部进行测试

kubectl port-forward service/quickstart-es-http 9200

再安装一个kibana

cat <<EOF | kubectl apply -f -
apiVersion: kibana.k8s.elastic.co/v1
kind: Kibana
metadata:
  name: quickstart
spec:
  version: 7.15.2
  count: 1
  elasticsearchRef:
    name: quickstart
EOF

可以通过port-forward转发kibana的端口到外部进行测试

kubectl port-forward service/quickstart-kb-http 5601

fluentd安装

编写一个fluentd.yaml ，

编写完毕后kubectl apply -f fluentd.yaml 。内容如下,注意替换密码：

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: fluentd
  namespace: kube-logging
  labels:
    app: fluentd
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: fluentd
  labels:
    app: fluentd
rules:
- apiGroups:
  - ""
  resources:
  - pods
  - namespaces
  verbs:
  - get
  - list
  - watch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: fluentd
roleRef:
  kind: ClusterRole
  name: fluentd
  apiGroup: rbac.authorization.k8s.io
subjects:
- kind: ServiceAccount
  name: fluentd
  namespace: kube-logging
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: fluentd
  namespace: kube-logging
  labels:
    app: fluentd
spec:
  selector:
    matchLabels:
      app: fluentd
  template:
    metadata:
      labels:
        app: fluentd
    spec:
      serviceAccount: fluentd
      serviceAccountName: fluentd
      tolerations:
      - key: node-role.kubernetes.io/master
        effect: NoSchedule
      containers:
      - name: fluentd
        image: fluent/fluentd-kubernetes-daemonset:v1.4.2-debian-elasticsearch-1.1
        env:
          - name:  FLUENT_ELASTICSEARCH_HOST
            value: "quickstart-es-http.default.svc.cluster.local"
          - name:  FLUENT_ELASTICSEARCH_PORT
            value: "9200"
          - name: FLUENT_ELASTICSEARCH_SCHEME
            value: "http"
          - name: FLUENT_ELASTICSEARCH_USER
            value: "elastic"
          - name: FLUENT_ELASTICSEARCH_PASSWORD
            value: "我是密码！注意替换"
          - name: FLUENT_ELASTICSEARCH_SSL_VERSION
            value: "TLSv1_2"
          - name: FLUENTD_SYSTEMD_CONF
            value: disable
          - name: FLUENT_UID
            value: "0"
        resources:
          limits:
            memory: 512Mi
          requests:
            cpu: 100m
            memory: 200Mi
        volumeMounts:
        - name: varlog
          mountPath: /var/log
        - name: varlibdockercontainers
          mountPath: /var/lib/docker/containers
          readOnly: true
      terminationGracePeriodSeconds: 30
      volumes:
      - name: varlog
        hostPath:
          path: /var/log
      - name: varlibdockercontainers
        hostPath:
          path: /var/lib/docker/containers

部署一个测试程序（用完之后可以删除）

kubectl -n logging apply -f - <<"EOF"
apiVersion: apps/v1
kind: Deployment
metadata:
 name: log-generator
spec:
 selector:
   matchLabels:
     app.kubernetes.io/name: log-generator
 replicas: 1
 template:
   metadata:
     labels:
       app.kubernetes.io/name: log-generator
   spec:
     containers:
     - name: nginx
       image: banzaicloud/log-generator:0.3.2
EOF

kibana里添加index和查看

直接看图说话

参考文章

https://www.digitalocean.com/community/tutorials/how-to-set-up-an-elasticsearch-fluentd-and-kibana-efk-logging-stack-on-kubernetes
https://docs.fluentd.org/output/elasticsearch
https://github.com/fluent/fluentd-kubernetes-daemonset
https://medium.com/kubernetes-tutorials/cluster-level-logging-in-kubernetes-with-fluentd-e59aa2b6093a