helm部署Filebeat + ELK

系统架构图：

1) 多个Filebeat在各个Node进行日志采集，然后上传至Logstash

2) 多个Logstash节点并行（负载均衡，不作为集群），对日志记录进行过滤处理，然后上传至Elasticsearch集群

3) 多个Elasticsearch构成集群服务，提供日志的索引和存储能力

4) Kibana负责对Elasticsearch中的日志数据进行检索、分析

1. Elasticsearch部署

官方chart地址：https://github.com/elastic/helm-charts/tree/master/elasticsearch

创建logs命名空间

kubectl create ns logs

添加elastic helm charts 仓库

helm repo add elastic https://helm.elastic.co

安装

helm install --name elasticsearch elastic/elasticsearch --namespace logs

参数说明

image: "docker.elastic.co/elasticsearch/elasticsearch"

imageTag: "7.2.0"

imagePullPolicy: "IfNotPresent"

podAnnotations: {}

esJavaOpts: "-Xmx1g -Xms1g"

resources:

  requests:

    cpu: "100m"

    memory: "2Gi"

  limits:

    cpu: "1000m"

    memory: "2Gi"

volumeClaimTemplate:

  accessModes: [ "ReadWriteOnce" ]

  storageClassName: "nfs-client"

  resources:

    requests:

      storage: 50Gi

2. Filebeat部署

官方chart地址：https://github.com/elastic/helm-charts/tree/master/filebeat

Add the elastic helm charts repo

helm repo add elastic https://helm.elastic.co

Install it

helm install --name filebeat elastic/filebeat --namespace logs

参数说明：

image: "docker.elastic.co/beats/filebeat"

imageTag: "7.2.0"

imagePullPolicy: "IfNotPresent"

resources:

  requests:

    cpu: "100m"

    memory: "100Mi"

  limits:

    cpu: "1000m"

    memory: "200Mi"

那么问题来了，filebeat默认收集宿主机上docker的日志路径：/var/lib/docker/containers。如果我们修改了docker的安装路径要怎么收集呢，很简单修改chart里的DaemonSet文件里边的hostPath参数：

      - name: varlibdockercontainers

        hostPath:

          path: /var/lib/docker/containers   #改为docker安装路径

对java程序的报错异常log实现多行合并，用multiline定义正则来匹配。

filebeatConfig:

  filebeat.yml: |

    filebeat.inputs:

    - type: docker

      containers.ids:

      - '*'

      multiline.pattern: '^[0-9]'

      multiline.negate: true

      multiline.match: after

      processors:

      - add_kubernetes_metadata:

          in_cluster: true

    output.elasticsearch:

      hosts: '${ELASTICSEARCH_HOSTS:elasticsearch-master:9200}'

3. Kibana部署

官方chart地址：https://github.com/elastic/helm-charts/tree/master/kibana

Add the elastic helm charts repo

helm repo add elastic https://helm.elastic.co

Install it

helm install --name kibana elastic/kibana --namespace logs

参数说明：

elasticsearchHosts: "http://elasticsearch-master:9200"

replicas: 1

image: "docker.elastic.co/kibana/kibana"

imageTag: "7.2.0"

imagePullPolicy: "IfNotPresent"

resources:

  requests:

    cpu: "100m"

    memory: "500m"

  limits:

    cpu: "1000m"

    memory: "1Gi"

4. Logstash部署

官方chart地址：https://github.com/helm/charts/tree/master/stable/logstash

安装

$ helm install --name logstash stable/logstash --namespace logs

参数说明：

image:

  repository: docker.elastic.co/logstash/logstash-oss

  tag: 7.2.0

  pullPolicy: IfNotPresent

persistence:

  enabled: true

  storageClass: "nfs-client"

  accessMode: ReadWriteOnce

  size: 2Gi

匹配label：json的pod日志，没有的话正常收集。

filebeatConfig:

  filebeat.yml: |

    filebeat.autodiscover:

      providers:

        - type: kubernetes

          templates:

            - condition:

                equals:

                  kubernetes.labels.logFormat: "json"

              config:

                - type: docker

                  containers.ids:

                    - "${data.kubernetes.container.id}"

                  json.keys_under_root: true

                  json.overwrite_keys: true

                  json.add_error_key: true

            - config:

                - type: docker

                  containers.ids:

                    - "${data.kubernetes.container.id}"

                  processors:

                    - add_kubernetes_metadata:

                        in_cluster: true

    output.elasticsearch:

      hosts: '${ELASTICSEARCH_HOSTS:elasticsearch-master:9200}'

5. Elastalert部署

官方chart地址：https://github.com/helm/charts/tree/master/stable/elastalert

安装

helm install -n elastalert ./elastalert --namespace logs

　效果图：