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prometheus搭建

IT知识prometheus搭建

不操千曲而后晓声，观千剑而后识器。这篇文章主要讲述prometheus搭建相关的知识，希望能为你提供帮助。

因为K8s集群版本为1.18，所以我们用0.5的版本git clone -b release-0.5 --single-branch https://github.com.cnpmjs.org/coreos/kube-prometheus.git
kubectlapply-fkube-prometheus/manifests/setup/*
kubectlapply-fkube-prometheus/manifests/*
【prometheus搭建】待全部pod起来后vimkube-prometheus/manifests/grafana-service.yaml

用nodeport的方式暴露service、

就可以使用10.0.12.101:32102登录了

默认用户名和mima都是admin
如果要配置告警修改/root/kube-prometheus/manifests/alertmanager-secret.yaml文件

apiVersion: v1
data:
kind: Secret
metadata:
name: alertmanager-main
namespace: monitoring
stringData:
alertmanager.yaml: |-
global:
resolve_timeout: 1m # 处理超时时间
smtp_smarthost: smtp.qq.com:465 # 邮箱smtp服务器代理
smtp_from: ****< strong> @qq.com # 发送邮箱名称
smtp_auth_username: < /strong> *< strong> @qq.com # 邮箱名称
smtp_auth_password: < /strong> ****< strong> # 授权mima
smtp_require_tls: false # 不开启tls 默认开启

receivers:
- name: Default
email_configs: # 邮箱配置
- to: "< /strong> *****@qq.com" # 接收警报的email配置

route:
group_interval: 1m # 在发送新警报前的等待时间
group_wait: 10s # 最初即第一次等待多久时间发送一组警报的通知
receiver: Default
repeat_interval: 1m # 发送重复警报的周期
type: Opaque

上面邮箱可根据自己需求更改





数据持久化prometheus（locolhost）先创建sc
vimpromethues-sc.yaml

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
name: local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer

再创建pv
vim pv.yaml

apiVersion: v1
kind: PersistentVolume
metadata:
name: prom-local-pv-0
labels:
app: prometheus
spec:
capacity:
storage: 50Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Retain
storageClassName: local-storage
local:
path: /data/prometheus-db
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- moa-k8s-prometheus-01

修改prometheus-prometheus.yaml文件
storage:
volumeClaimTemplate:
spec:
selector:
matchLabels:
app: prometheus
storageClassName: local-storage
resources:
requests:
storage: 50Gi

然后执行kubectlapply-fprometheus-prometheus.yaml
可以使用Kubectlgetpv查看pv的状态

NAMECAPACITYACCESS MODESRECLAIM POLICYSTATUSCLAIMSTORAGECLASSREASONAGE
prom-local-pv-050GiRWORetainBoundmonitoring/prometheus-k8s-db-prometheus-k8s-0local-storage7m37s

可以看出状态已经bound了，就可以去目录看有没有数据了

修改prometheus-operator数据存储时间??prometheus operator数据保留天数??，根据官方文档的说明，??默认prometheus operator数据存储的时间为1d??，这个时候无论你prometheus operator如何进行持久化，都没有作用，因为数据只保留了1天，那么你是无法看到更多天数的数据

vimprometheus-prometheus.yml

然后重新apply，查看服务状态
监控其他服务

1. 监控redis部署redis_exporter
wget https://github.com/oliver006/redis_exporter/releases/download/v1.12.1/redis_exporter-v1.12.1.linux-amd64.tar.gz

tar -zxvfredis_exporter-v1.12.1.linux-amd64.tar.gz./redis_exporter -redis.addr=10.0.13.104:6379-redis.password=2RIQdfmfgdUrPJ83qbNDYzbu2m-web.listen-address=10.0.13.104:9121&

在Kube-prometheus创建 endpoint serviceservicemonitor
apiVersion: v1
kind: Endpoints
metadata:
name: redis-metrics
namespace: monitoring
labels:
k8s-app: redis-metrics
subsets:
- addresses:
- ip: 10.0.13.104
ports:
- name: redis-exporter
port: 9121
protocol: TCP
---
apiVersion: v1
kind: Service
metadata:
name: redis-metrics
namespace: monitoring
labels:
k8s-app: redis-metrics
spec:
type: ClusterIP
clusterIP: None
ports:
- name: redis-exporter
port: 9121
protocol: TCP
---
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
name: redis-metrics
namespace: monitoring
labels:
app: redis-metrics
k8s-app: redis-metrics
prometheus: kube-prometheus
release: kube-prometheus
spec:
endpoints:
- port: redis-exporter
interval: 15s
selector:
matchLabels:
k8s-app: redis-metrics
namespaceSelector:
matchNames:
- monitoring

kubectl create -fredis-monitor.yaml
kubectl delete -f prometheus-prometheus.yaml

模板11692

2. 监控mysqlhttps://github.com/prometheus/mysqld_exporter/releases
mysql_exporter下载地址下0.12.0的
https://www.cnblogs.com/jasonminghao/p/12715018.html文档地址

mysql_exporter部署
1.下载mysql_exporter并解压
$ tar xf /opt/src/mysqld_exporter-0.12.1.linux-amd64.tar.gz

// 将mysql_exporter二进制文件拷贝至/usr/local/bin
$ cp /opt/src/mysqld_exporter-0.12.1.linux-amd64/mysqld_exporter /usr/local/bin/

2.需要授权用户给exporter使用
> CREATE USER exporter@localhost IDENTIFIED BY abc12345 WITH MAX_USER_CONNECTIONS 5;

// 可查看主从运行情况查看线程，及所有数据库。
> GRANT PROCESS, REPLICATION CLIENT, SELECT ON *.* TO exporter@localhost;

为该用户设置最大连接数为了避免监控数据过大导致服务器超载
3.修改mysql配置文件，添加刚才创建的exporter用户和mima
$ vim /etc/my.cnf
[client]
user=exporter
password=abc12345

4.启动exporter客户端，需指定mysql配置文件，读取exporter用户和mima
$ mysqld_exporter --config.my-cnf=/etc/my.cnf

常用参数：
// 选择采集innodb
--collect.info_schema.innodb_cmp
// innodb存储引擎状态
--collect.engine_innodb_status
// 指定配置文件
--config.my-cnf="/etc/my.cnf"

5.添加system系统服务
$ vim /usr/lib/systemd/system/mysql_exporter.service
[Unit]
Description=Prometheus
Wants=network-online.target
After=network-online.target

[Service]
User=root
Group=root
Type=simple
ExecStart=/usr/local/bin/mysqld_exporter \\
--config.my-cnf=/etc/my.cnf

[Install]
WantedBy=multi-user.target

6.启动添加的system服务
$ systemctl daemon-reload

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