基于k8s搭建微服务日志收集中心
由于项目组业务需求,在k8s中运行的微服务日志要进行收集。
1、需要将k8s中的每个pod微服务挂载一个卷,(每个pod都会在一个node上,在node节点上创建一个文件夹,如:/logs/ 将这个目录挂载到每个微服务的pod中,使之实现映射)
apiVersion: apps/v1 kind: Deployment metadata: name: neusipo-cloud-gateway-deployment namespace: gateway spec: selector: matchLabels: app: neusipo-cloud-gateway replicas: 3 minReadySeconds: 10 strategy: rollingUpdate: maxSurge: 25% maxUnavailable: 0 type: RollingUpdate template: metadata: name: neusipo-cloud-gateway labels: app: neusipo-cloud-gateway spec: containers: - name: neusipo-cloud-gateway image: cr.registry.cnipaig1.cloud/neusipo/neusipo-cloud-gateway-test:1.0 #这里的镜像地址是阿里云镜像仓库地址 args: ["--spring.profiles.active=test"] #配置文件中的测试配置 env: - name: SERVER_PORT value: "18080" resources: requests: cpu: 4 memory: 4Gi limits: cpu: 4 memory: 4Gi volumeMounts: #pod中挂载 - name: gateway-logs #name与下方本机name保持一致 mountPath: /sipo-data/neusipo-test/ #pod中的挂载地址 readOnly: false volumes: #本机卷 - name: gateway-logs hostPath: path: /logs/ #本机创建的挂载目录
2、执行命令,创建pod。
kubectl apply -f deployment-demo.yaml -n gateway
3、查看是否创建成功
[root@iZqj001np4kv147ax0tr54Z ~]# kubectl get pods -n gateway NAME READY STATUS RESTARTS AGE neusipo-cloud-gateway-deployment-66b6c96fbf-9ncht 1/1 Running 0 4h16m neusipo-cloud-gateway-deployment-66b6c96fbf-r7wcd 1/1 Running 0 4h16m neusipo-cloud-gateway-deployment-66b6c96fbf-wwjpk 1/1 Running 0 4h16m
看到STATUS状态为Running 时说明容器已启动。
4、此时验证pod中是否已经挂载上本机目录。
[root@iZqj001np4kv147ax0tr54Z ~]# kubectl exec -it neusipo-cloud-gateway-deployment-66b6c96fbf-9ncht -n gateway -- bash
[root@neusipo-cloud-gateway-deployment-66b6c96fbf-9ncht data]# df -h
Filesystem Size Used Avail Use% Mounted on
overlay 40G 17G 21G 45% /
tmpfs 64M 0 64M 0% /dev
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/vda1 40G 17G 21G 45% /sipo-data/neusipo-test #这里就代表已经挂载上本机所创建的目录了
shm 64M 0 64M 0% /dev/shm
tmpfs 7.8G 12K 7.8G 1% /run/secrets/kubernetes.io/serviceaccount
tmpfs 7.8G 0 7.8G 0% /proc/acpi
tmpfs 7.8G 0 7.8G 0% /proc/scsi
tmpfs 7.8G 0 7.8G 0% /sys/firmware
[root@neusipo-cloud-gateway-deployment-66b6c96fbf-9ncht data]#
此时查看pod服务启动后是否有日志打印,通过映射到node节点上创建的目录。(查看pod在那个node节点上,登录node节点,进入创建的目录,查看是否pod日志映射出来)
[root@neusipo-cloud-gateway-deployment-66b6c96fbf-9ncht data]# cd /sipo-data/neusipo-test/ [root@neusipo-cloud-gateway-deployment-66b6c96fbf-9ncht neusipo-test]# ls gateway [root@neusipo-cloud-gateway-deployment-66b6c96fbf-9ncht neusipo-test]# cd gateway/ [root@neusipo-cloud-gateway-deployment-66b6c96fbf-9ncht gateway]# ls logs [root@neusipo-cloud-gateway-deployment-66b6c96fbf-9ncht gateway]# cd logs/ [root@neusipo-cloud-gateway-deployment-66b6c96fbf-9ncht logs]# ls error info
[root@iZqj001np4kv147ax0tr54Z ~]# kubectl get pods -n gateway -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES neusipo-cloud-gateway-deployment-66b6c96fbf-9ncht 1/1 Running 0 4h26m 172.20.1.91 cn-beijing-gzj1-d01.i-qj001np4kv147gu45x2l <none> <none> neusipo-cloud-gateway-deployment-66b6c96fbf-r7wcd 1/1 Running 0 4h26m 172.20.0.198 cn-beijing-gzj1-d01.i-qj001np4kv147gu45x2k <none> <none> neusipo-cloud-gateway-deployment-66b6c96fbf-wwjpk 1/1 Running 0 4h26m 172.20.1.60 cn-beijing-gzj1-d01.i-qj001np4kv147gu45x2j <none> <none> [root@iZqj001np4kv147ax0tr54Z ~]# kubectl get node -o wide NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME cn-beijing-gzj1-d01.i-qj001np4kv147ax0tr54 Ready master 198d v1.14.8-aliyun.1 10.160.22.68 <none> CentOS Linux 7 (Core) 3.10.0-957.21.3.el7.x86_64 docker://18.9.2 cn-beijing-gzj1-d01.i-qj001np4kv147ax0tr55 Ready master 198d v1.14.8-aliyun.1 10.160.22.69 <none> CentOS Linux 7 (Core) 3.10.0-957.21.3.el7.x86_64 docker://18.9.2 cn-beijing-gzj1-d01.i-qj001np4kv147ax0tr56 Ready master 198d v1.14.8-aliyun.1 10.160.22.70 <none> CentOS Linux 7 (Core) 3.10.0-957.21.3.el7.x86_64 docker://18.9.2 cn-beijing-gzj1-d01.i-qj001np4kv147gu45x2j Ready <none> 198d v1.14.8-aliyun.1 10.160.22.73 <none> CentOS Linux 7 (Core) 3.10.0-957.21.3.el7.x86_64 docker://18.9.2 cn-beijing-gzj1-d01.i-qj001np4kv147gu45x2k Ready <none> 198d v1.14.8-aliyun.1 10.160.22.72 <none> CentOS Linux 7 (Core) 3.10.0-957.21.3.el7.x86_64 docker://18.9.2 cn-beijing-gzj1-d01.i-qj001np4kv147gu45x2l Ready <none> 198d v1.14.8-aliyun.1 10.160.22.71 <none> CentOS Linux 7 (Core) 3.10.0-957.21.3.el7.x86_64 docker://18.9.2
从这里看到其中一个pod在10.160.22.73这个node节点上,登录node节点查看是否有映射的日志
[root@iZqj001np4kv147gu45x2jZ logs]# pwd /logs [root@iZqj001np4kv147gu45x2jZ logs]# ls gateway [root@iZqj001np4kv147gu45x2jZ logs]# cd gateway/ [root@iZqj001np4kv147gu45x2jZ gateway]# ls logs [root@iZqj001np4kv147gu45x2jZ gateway]# cd logs/ [root@iZqj001np4kv147gu45x2jZ logs]# ls error info
如果node节点出现了和pod中一样的目录则说明,挂载成功并映射成功,(其他微服务同理就行)
5、日志映射出来后,需要搭建filebeat镜像,创建filebeat的pod容器,容器需要创建为DaemonSet形式的(DaemonSet所创建的容器类似于守护进程,它会在每个node节点都创建一个pod),使filebeat容器可以从所有的node节点日志目录拉取日志到pod中,并发送给elk进行日志分析。在master节点上下载filebeat压缩包,并解压。
[root@iZqj001np4kv147ax0tr54Z ~]# ls deployment-demo.yaml filebeat-7.13.1-linux-x86_64.tar.gz daemonset-demo.yamlfilebeat-7.13.1-linux-x86_64 daemonset-demo.yaml dockerfile-filebeat
创建filebeat的docker镜像
[root@iZqj001np4kv147ax0tr54Z ~]# cat dockerfile-filebeat FROM cr.registry.cnipaig1.cloud/neusipo/centos:7.9.2009 ENV LANG en_US.UTF-8 ENV TZ Asia/Shanghai ADD filebeat-7.13.1-linux-x86_64.tar.gz /data/ WORKDIR /data/filebeat-7.13.1-linux-x86_64 ENTRYPOINT ["./filebeat", "-c", "filebeat.yml", "-e"]
上传到阿里云的镜像仓库,阿里云容器镜像服务文档中已写如何上传,照着一步步执行就可。
构建filebeat的yaml文件
apiVersion: apps/v1 kind: DaemonSet #这里为DaemonSet模式 metadata: name: neusipo-filebeat namespace: filebeat spec: selector: matchLabels: app: neusipo-filebeat template: metadata: name: neusipo-filebeat labels: app: neusipo-filebeat spec: containers: - name: neusipo-filebeat image: cr.registry.cnipaig1.cloud/neusipo/filebeat:v2 command: ["./filebeat", "-c", "/data/filebeat/conf/filebeat.yml", "-e"] #command模块可以强制替换容器里默认的启动命令 resources: requests: cpu: 4 memory: 4Gi limits: cpu: 4 memory: 4Gi volumeMounts: - name: filebeat-log mountPath: /sipo-data/neusipo-test/ #这里为挂载node目录到pod中的目录 readOnly: false - name: neusipo-filebeat mountPath: /data/filebeat/conf/ #这里为pod容器内filebeat配置文件目录 readOnly: true volumes: - name: filebeat-log hostPath: path: /logs/ #node节点目录 - name: neusipo-filebeat configMap: #将pod容器内的filebeat配置文件映射到configmap中 name: neusipo-filebeat #configmap内filebeat的name items: - key: filebeat.yml #映射在configmap中的filebeat的配置文件名 path: filebeat.yml #pod中filebeat的配置文件名
创建neusipo-filebeat的configmap,映射的文件是从filebeat压缩包解压出来的配置文件
[root@iZqj001np4kv147ax0tr54Z ~]# kubectl create configmap neusipo-filebeat --from-file=filebeat.yml -n filebeat
[root@iZqj001np4kv147ax0tr54Z ~]# kubectl get configmap -n filebeat
NAME DATA AGE
neusipo-filebeat 1 3h55m #这里DATA出现1,说明文件已经写入
创建namesapce
[root@iZqj001np4kv147ax0tr54Z ~]# kubectl create configmap ns filebeat [root@iZqj001np4kv147ax0tr54Z ~]# kubectl get ns |grep filebeat filebeat Active 4h25m
创建filebeat的pod容器,并查看是否创建成功
kubectl apply -f daemonset-demo.yaml -n filebeat [root@iZqj001np4kv147ax0tr54Z ~]# kubectl get pods -n filebeat NAME READY STATUS RESTARTS AGE neusipo-filebeat-64mhf 1/1 Running 0 3h55m neusipo-filebeat-k9ncp 1/1 Running 0 3h55m neusipo-filebeat-lsvcb 1/1 Running 0 3h55m
进入容器查看是否挂载上node目录,并查看是否拉取到微服务的日志
[root@iZqj001np4kv147ax0tr54Z ~]# kubectl exec -it neusipo-filebeat-k9ncp -n filebeat /bin/bash [root@neusipo-filebeat-k9ncp filebeat-7.13.1-linux-x86_64]# df -h Filesystem Size Used Avail Use% Mounted on overlay 40G 17G 21G 45% / tmpfs 64M 0 64M 0% /dev tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup /dev/vda1 40G 17G 21G 45% /sipo-data/neusipo-test shm 64M 0 64M 0% /dev/shm tmpfs 7.8G 12K 7.8G 1% /run/secrets/kubernetes.io/serviceaccount tmpfs 7.8G 0 7.8G 0% /proc/acpi tmpfs 7.8G 0 7.8G 0% /proc/scsi tmpfs 7.8G 0 7.8G 0% /sys/firmware [root@neusipo-filebeat-k9ncp filebeat-7.13.1-linux-x86_64]# cd /sipo-data/neusipo-test/ [root@neusipo-filebeat-k9ncp neusipo-test]# ls gateway [root@neusipo-filebeat-k9ncp neusipo-test]# cd gateway/ [root@neusipo-filebeat-k9ncp gateway]# ls logs [root@neusipo-filebeat-k9ncp gateway]# cd logs/ [root@neusipo-filebeat-k9ncp logs]# ls error info [root@neusipo-filebeat-k9ncp logs]#
后续只需要更改configmap中的filebeat配置文件,就可以了。
kubectl edit configmap neusipo-filebeat -n filebeat
完成!!!