（十一）filebeat日志收集

#（1）filebeat下载
https://artifacts.elastic.co/downloads/beats/filebeat/filebeat-5.4.0-linux-x86_64.tar.gz

#（2）构建filebeat镜像

1）准备dockerfile文件

# cat dockerfile
FROM  docker.io/centos
WORKDIR /usr/local
COPY filebeat-5.4.0-linux-x86_64.tar.gz  /usr/local
RUN cd /usr/local && \
        tar xvf filebeat-5.4.0-linux-x86_64.tar.gz && \
        rm -f filebeat-5.4.0-linux-x86_64.tar.gz && \
        ln -s /usr/local/filebeat-5.4.0-linux-x86_64 /usr/local/filebeat && \
        chmod +x /usr/local/filebeat/filebeat && \
        mkdir -p /etc/filebeat
ADD ./docker-entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/docker-entrypoint.sh
ENTRYPOINT ["docker-entrypoint.sh"]
CMD ["/usr/local/filebeat/filebeat","-e","-c","/etc/filebeat/filebeat.yml"]

2）准备docker-entrypoint.sh

# cat docker-entrypoint.sh 
#!/bin/bash
config=/etc/filebeat/filebeat.yml
env
echo 'Filebeat init process done. Ready for start up.'
echo "Using the following configuration:"
cat /etc/filebeat/filebeat.yml
exec "$@"

3）构建
docker build -t registry.cn-hangzhou.aliyuncs.com/wangfang-k8s/filebeat-v5.4.0:latest .
同时我把镜像上传到阿里云
docker push registry.cn-hangzhou.aliyuncs.com/wangfang-k8s/filebeat-v5.4.0:latest
#（3）准备资源清单

1）准备filebeat配置文件,
该配置文件的意思是收集/log/目录下的所有文件, 输出到redis中

# cat configmap.yaml 
apiVersion: v1
kind: ConfigMap
metadata:
    name: filebeat-config
data:
    filebeat.yml: |
        filebeat.prospectors:
        - type: log
            paths:
                - "/log/*"
        output.redis:
            hosts: ["192.168.1.51:6379"]
            key: "nginx-log"
            db: 2
            tag: "nginx-log"
            password: "redhat"
            port: 6379

2）准备NGINX的deployment配置清单文件
nginx容器和filebeat容器运行在一个pod中, nginx的容器日志在的/var/log/nginx目录下, 而filebeat又以/log目录挂载, 所以在filebeat的/log目录下能看到nginx的日志

# cat nginx-deployment.yaml 
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
    name: nginx-test
    namespace: default
spec:
    replicas: 1
    template:
        metadata:
            labels:
                k8s-app: nginx-test
        spec:
            containers:
            - image: registry.cn-hangzhou.aliyuncs.com/wangfang-k8s/filebeat-v5.4.0
                imagePullPolicy: Always
                name: filebeat
                volumeMounts:
                - name: app-logs
                    mountPath: /log
                - name: filebeat-config
                    mountPath: /etc/filebeat/
            - image: nginx:1.11
                name : nginx-test
                imagePullPolicy: Always
                ports:
                - containerPort: 80
                volumeMounts:
                - name: app-logs
                    mountPath: /var/log/nginx
            volumes:
            - name: app-logs
                emptyDir: {}
            - name: filebeat-config
                configMap:
                    name: filebeat-config

3）准备nginx-service的资源配置清单文件

# cat service.yaml 
apiVersion: v1
kind: Service
metadata:
    name: nginx-test
spec:
    selector:
        k8s-app: nginx-test
    ports:
    - name: http
        nodePort: 38888
        port: 89
        protocol: TCP
        targetPort: 80
    type: NodePort

4）部署
kubectl apply -f .
容器正常运行

5）访问nginx
curl 172.30.5.3:80

6）登录到redis查看是否有日志
说明有日志没有问题