k8s elk之logstash日志数据筛选、合并、字段匹配、索引区分

申明：

• 我想把我收集的日志中不需要的数据，在kibana上不展示。
• 我想索引名字按照日志中某个字段定义名称
• 我想把日志几行合并为一行在kibana上展示
• 我想把几个索引的某个关键字匹配的内容写入一个新的索引

1. 安装基础环境

1. 安装es:

#cat elasticsearch-statefulset.yaml
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: es-cluster
  namespace: kube-logging
spec:
  serviceName: elasticsearch
  replicas: 1
  selector:
    matchLabels:
      app: elasticsearch
  template:
    metadata:
      labels:
        app: elasticsearch
    spec:
     # nodeName: k8s-node3 指定node
      containers:
      - name: elasticsearch
        image: elasticsearch:7.12.1
        imagePullPolicy: IfNotPresent
        resources:
            limits:
              cpu: 1000m
            requests:
              cpu: 100m
        ports:
        - containerPort: 9200
          name: rest
          protocol: TCP
        - containerPort: 9300
          name: inter-node
          protocol: TCP
        volumeMounts:
        - name: data
          mountPath: /usr/share/elasticsearch/data
        env:
          - name: cluster.name
            value: k8s-logs
          - name: node.name
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
          - name: discovery.seed_hosts
            value: "es-cluster-0.elasticsearch"
          - name: cluster.initial_master_nodes
            value: "es-cluster-0"
          - name: ES_JAVA_OPTS
            value: "-Xms2g -Xmx2g"
      initContainers:
      - name: fix-permissions
        image: busybox
        imagePullPolicy: IfNotPresent
        command: ["sh", "-c", "chown -R 1000:1000 /usr/share/elasticsearch/data"]
        securityContext:
          privileged: true
        volumeMounts:
        - name: data
          mountPath: /usr/share/elasticsearch/data
      - name: increase-vm-max-map
        image: busybox
        imagePullPolicy: IfNotPresent
        command: ["sysctl", "-w", "vm.max_map_count=262144"]
        securityContext:
          privileged: true
      - name: increase-fd-ulimit
        image: busybox
        imagePullPolicy: IfNotPresent
        command: ["sh", "-c", "ulimit -n 65536"]
        securityContext:
          privileged: true
      volumes:
      - name: data
        hostPath:
         path: /home/es/
        

2. es-svc

#cat elasticsearch_svc.yaml
apiVersion: v1
kind: Service
metadata:
  name: elasticsearch
  namespace: kube-logging
  labels:
    app: elasticsearch
spec:
  selector:
    app: elasticsearch
  clusterIP: None
  ports:
    - port: 9200
      name: rest
    - port: 9300
      name: inter-node

3. filebeat部署

# cat flebete.yaml
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: filebeat
  namespace: kube-logging
  labels:
    k8s-app: filebeat
spec:
  selector:
    matchLabels:
      k8s-app: filebeat
  template:
    metadata:
      labels:
        k8s-app: filebeat
    spec:
      serviceAccountName: filebeat
      terminationGracePeriodSeconds: 30
      hostNetwork: true
      dnsPolicy: ClusterFirstWithHostNet
      containers:
      - name: filebeat
        image: elastic/filebeat:7.6.2
        args: [
          "-c", "/etc/filebeat.yml",
          "-e",
        ]
        env:
        - name: ELASTICSEARCH_HOST
          value: elasticsearch
        - name: ELASTICSEARCH_PORT
          value: "9200"
        - name: ELASTICSEARCH_USERNAME
          value: elastic
        - name: ELASTICSEARCH_PASSWORD
          value: changeme
        - name: ELASTIC_CLOUD_ID
          value:
        - name: ELASTIC_CLOUD_AUTH
          value:
        - name: NODE_NAME
          valueFrom:
            fieldRef:
              fieldPath: spec.nodeName
        securityContext:
          runAsUser: 0
          # If using Red Hat OpenShift uncomment this: privileged: true
        resources:
          limits:
            cpu: 500m
            memory: 500Mi
          requests:
            cpu: 100m
            memory: 100Mi
        volumeMounts:
        - name: config
          mountPath: /etc/filebeat.yml
          readOnly: true
          subPath: filebeat.yml
        - name: data
          mountPath: /usr/share/filebeat/data
        - name: varlibdockercontainers
          mountPath: /var/lib/docker/containers
          readOnly: true
        - name: varlog
          mountPath: /var/log
          readOnly: true
      #nodeSelector:
      #  logging: es
      volumes:
      - name: config
        configMap:
          defaultMode: 0600
          name: filebeat-config
      - name: varlibdockercontainers
        hostPath:
          path: /var/lib/docker/containers
      - name: varlog
        hostPath:
          path: /var/log
      # data folder stores a registry of read status for all files, so we don't send everything again on a Filebeat pod restart
      - name: data
        hostPath:
          path: /var/lib/filebeat-data
          type: DirectoryOrCreate
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: filebeat
subjects:
- kind: ServiceAccount
  name: filebeat
  namespace: kube-logging
roleRef:
  kind: ClusterRole
  name: filebeat
  apiGroup: rbac.authorization.k8s.io
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: filebeat
  labels:
    k8s-app: filebeat
rules:
- apiGroups: [""]
# "" indicates the core API group
  resources:
  - namespaces
  - pods
  verbs:
  - get
  - watch
  - list
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: filebeat
  namespace: kube-logging
  labels:
    k8s-app: filebeat

4. filebeat-config文件

#cat flebete-config.yaml
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: filebeat-config
  namespace: kube-logging
  labels:
    k8s-app: filebeat
data:
  filebeat.yml: |-
    filebeat.inputs:
    - type: container
      paths: #多日志路径匹配
        - /var/log/containers/*.log
        - /var/log/test/*.log

    output.logstash: #logstash地址
      hosts: ['logstash.kube-logging.svc.cluster.local:5044']

5. logstash部署

 #cat logs.yaml
---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: logstash
  namespace: kube-logging
spec:
  selector:
    matchLabels:
      app: logstash
  template:
    metadata:
      labels:
        app: logstash
    spec:
      hostname: logstash
      containers:
      - name: logstash
        ports:
          - containerPort: 5044
            name: logstash
        image: logstash:v1  #这儿我自己打了一个镜像，安装了multiline模块。基础镜像（logstash:7.5.0）没有这个模块，进入容器执行（bin/logstash-plugin install logstash-filter-multiline）,查看（bin/logstash-plugin install logstash-filter-multiline）
        volumeMounts:
        - name: logstash-config
          mountPath: /usr/share/logstash/pipeline/
        command:
        - logstash
      volumes:
      # Previously defined ConfigMap object.
      - name: logstash-config
        configMap:
          name: logstash-config
          items:
          - key: logstash.conf
            path: logstash.conf
---
kind: Service
apiVersion: v1
metadata:
  name: logstash
  namespace: kube-logging
spec:
  #type: NodePort
  clusterIP: None
  selector:
    app: logstash
  ports:
  - protocol: TCP
    port: 5044
    name: logstash

6. logtash 配置

# cat logs-config.yaml
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: logstash-config
  namespace: kube-logging
data:
  logstash.conf: |-
      input {
    
    
        beats {
    
    
            port => "5044"
        }
       }
      filter {
    
    
        if [agent][id] == "7e857655-7475-4eb2-866e-d2939fe1ba03" {
    
      #此行可以删除，因为我是调试单个项目。解释日志字段agetn.id等于"7e857655-7475-4eb2-866e-d2939fe1ba03"并且删除包含info或者test的行，写入es，索引名字为my_index-7e857655-7475-4eb2-866e-d2939fe1ba03-2023.04.22。因为日志太多，所以无关紧要的日志不写入es
          if [message] =~ /info|test/ {
    
     #如果message里面包含了info或者test字符，就删除此行，不写入es索引。
            drop {
    
    }
             }
           }
        multiline {
    
     #此模块需要安装，正则匹配，把同一时间戳的合并为一行日志，多个正则用'|'来隔开，写入到es。
            pattern => "^\s*(\d{
    
    4}|\d{
    
    2})\-(\d{
    
    2}|[a-zA-Z]{
    
    3})\-(\d{
    
    2}|\d{
    
    4})|^(.*)(\d{
    
    4}|\d{
    
    2})\-(\d{
    
    2}|[a-zA-Z]{
    
    3})\-(\d{
    
    2}|\d{
    
    4})\s(\d{
    
    2}):(\d{
    
    1,2})|^{
    
    (.*)}|^\d{
    
    4}|^(.*)(\d{
    
    4}|\d{
    
    2})\-(\d{
    
    2}|[a-zA-Z]{
    
    3})\-(\d{
    
    2}|\d{
    
    4})\s(\d{
    
    2}):(\d{
    
    1,2})"
            negate => true #在 multiline filter 中，negate 是一个布尔类型的参数。如果将其设置为 true，则该插件将只处理不匹配正则表达式的行。换句话说，如果 negate 值为 true，则只有在输入中找到不与 pattern 相匹配的行时，该插件才会开始合并日志行到上一个事件中。
            what => "previous"  #"previous"（默认值）：将当前行添加到前一个事件的结尾。"next"：将当前行添加到下一个事件的开头
        }
      }
      output {
    
    
        elasticsearch {
    
     #es地址
            hosts => "elasticsearch.kube-logging.svc.cluster.local:9200"
            index => "my_index-%{
    
    [agent][id]}-%{
    
    +yyyy.MM.dd}" #新建索引名字为agetn.id的值,此功能用于，区分不同的项目日志，如app1日志索引名字my_index-app1-20230423,app2日志索引名字my_index-app2-20230423,一次内推。
        }
       }

7. 启动

kubectl apply -f ./

8. 多匹配条件

apiVersion: v1
kind: ConfigMap
metadata:
  name: logstash-config
  namespace: logging
data:
  logstash.conf: |-
      input {
    
    
        beats {
    
    
            port => "5044"
        }
       }
      filter {
    
    
       if [kubernetes][labels][app_kubernetes_io/name]  == "dtk-go-open-api" {
    
    
        #字段=dtk-go-open-api中，删除message中包含---的行
        if [message] =~ /---/ {
    
    
           drop {
    
    }
             }
       }
       if [kubernetes][labels][app_kubernetes_io/name]  == "dtk-go-taobao-api" or [kubernetes][labels][app_kubernetes_io/name]  == "dtk-go-taobao-api-h" {
    
    
        #字段等于dtk-go-taobao-api或者等于dtk-go-taobao-api-h中，message中包含CheckNewGoodsSign或者CheckNewGoodsSign2的行添加字段new_index=CheckNewGoodsSign-index
        if [message] =~ /CheckNewGoodsSign|CheckNewGoodsSign2/ {
    
    
           mutate {
    
    
            add_field => {
    
     "new_index" => "CheckNewGoodsSign-index" }
        }
       }
        }
        }
      output {
    
    
       #如果new_index字段等于CheckNewGoodsSign-index就写入checknewgoodssign-%{+yyyy.MM.dd}索引，其他的走下面的索引。
       if [new_index] == "CheckNewGoodsSign-index" {
    
    
          elasticsearch {
    
    
            hosts => "elasticsearch.logging.svc.cluster.local:9200"
            index => "checknewgoodssign-%{
    
    +yyyy.MM.dd}"
               }
             }
       else {
    
    
          elasticsearch {
    
    
            hosts => "elasticsearch.logging.svc.cluster.local:9200"
            index => "%{
    
    [kubernetes][labels][app_kubernetes_io/name]}-%{
    
    +yyyy.MM.dd}"
        }
       }
      }

9. 更新

apiVersion: v1
kind: ConfigMap
metadata:
  name: logstash-config
  namespace: logging
data:
  logstash.conf: |-
      input {
    
    
        beats {
    
    
            port => "5044"
        }
       }
      filter {
    
    
       if [kubernetes][labels][app_kubernetes_io/name]  == "dtk-go-open-api" {
    
    
        if [message] =~ /---/ {
    
    
           drop {
    
    }
             }
       }
       if [kubernetes][labels][app_kubernetes_io/name]  == "dtk-go-taobao-api-h" {
    
    
       #多匹配删除
        if [message] =~ /cloud.go:2279|cloud.go:2226/ {
    
    
           drop {
    
    }
             }
       }
      if [kubernetes][labels][app_kubernetes_io/name]  == "dtk-go-taobao-api" {
    
    
       if [message] =~ /-----auth_id-|-------11111----/{
    
    
          drop {
    
    }
            }
      }
       if [kubernetes][labels][app_kubernetes_io/name]  == "dtk-php-api-android-cms" {
    
    
           drop {
    
    }
       }
       if ![kubernetes][labels][app_kubernetes_io/name] {
    
    
             #空索引删除
           drop {
    
    }
       }

       if [kubernetes][labels][app_kubernetes_io/name]  == "dtk-go-taobao-api" or [kubernetes][labels][app_kubernetes_io/name]  == "dtk-go-taobao-api-h" {
    
    
        if [message] =~ /CheckNewGoodsSign|CheckNewGoodsSign2/ {
    
    
           mutate {
    
    
            add_field => {
    
     "new_index" => "CheckNewGoodsSign-index" }
        }
       }
        }
        }
      output {
    
    
       if [new_index] == "CheckNewGoodsSign-index" {
    
    
          elasticsearch {
    
    
            hosts => "elasticsearch.logging.svc.cluster.local:9200"
            index => "checknewgoodssign-%{
    
    +yyyy.MM.dd}"
               }
             }
       else if ![kubernetes][labels][app_kubernetes_io/name] {
    
    
          elasticsearch {
    
    
            hosts => "elasticsearch.logging.svc.cluster.local:9200"
            index => "index-unknown-%{
    
    +yyyy.MM.dd}"
          }
         }
       else {
    
    
          elasticsearch {
    
    
            hosts => "elasticsearch.logging.svc.cluster.local:9200"
            index => "%{
    
    [kubernetes][labels][app_kubernetes_io/name]}-%{
    
    +yyyy.MM.dd}"
        }
       }
      }