Chapter XIII nine analysis with you easily complete explosion helm3 Prometheus

This series of articles:

Chapter one: nine analyze with you easily install the complete explosion helm3
Chapter II: nine analyze with you easily complete explosion helm3 public warehouse

Chapter 3: nine analyze with you easily complete explosion helm3 private warehouse

Chapter 4: nine analyze with you easily complete explosion helm3 chart

Chapter V: nine analyze with you easily complete explosion helm3 release

Chapter 6: nine analyze with you easily complete explosion helm3 gitlab

Chapter 7: nine analyze with you easily complete explosion helm3 nginx-ingress

Chapter 8: nine analyze with you easily complete explosion helm3 gitlab nfs

Chapter 9: nine analyze with you easily complete explosion helm3 nexus

Chapter X: nine analyze with you easily complete explosion helm3 heapster

Chapter 11: nine analyze with you easily complete explosion helm3 kubernetes-dashboard

Chapter XII: nine analyze with you easily complete explosion helm3 harbor

Chapter XIII: nine analyze with you easily complete explosion helm3 prometheus

table of Contents

1 Introduction

2 Download Prometheus

3 prometheus create a namespace

4 Installation prometheus

4.1 modify the deployment apiVersion

4.2 Add daemonset selector

4.3 Adding deployment selector

4.4 modify ingress apiVersion

4.5 installation verification prometheus

5 Install nfs

6 Create pv

7 Verify prometheus

8 modify service type

9 Access prometheus

1 Introduction

In this paper, helm v3.0.0; k8s v1.16.3.

2 Download Prometheus

Search helm Prometheus:

helm search repo prometheus

helm download extract Prometheus:

helm fetch stable/prometheus

tar -zxvf prometheus-5.4.0.tgz

3 prometheus create a namespace

kubectl create ns prometheus

4 Installation prometheus

The first is a prometheus helm release name, the second is the namespace, and the third is prometheus local unzipped directory.

helm install prometheus -n prometheus prometheus

4.1 modify the deployment apiVersion

If there is an error during the installation follows:

Error: unable to build kubernetes objects from release manifest: unable to recognize "": no matches for kind "Deployment" in version "extensions/v1beta1"

Execute the following statement relaxed after blasting:

grep -irl 'extensions/v1beta1' prometheus/ | xargs sed -i 's#extensions/v1beta1#apps/v1#g'

4.2 Add daemonset selector

If you install again the following errors:

Error: unable to build kubernetes objects from release manifest: error validating "": error validating data: ValidationError(DaemonSet.spec): missing required field "selector" in io.k8s.api.apps.v1.DaemonSetSpec

Edit templates / node-exporter-daemonset.yaml file, add the following:

4.3 Adding deployment selector:

If the installation again reported the following error:

Error: unable to build kubernetes objects from release manifest: error validating "": error validating data: ValidationError(Deployment.spec): missing required field "selector" in io.k8s.api.apps.v1.DeploymentSpec

Edit templates / alertmanager-deployment.yaml file, add the following:

Edit templates / kube-state-metrics-deployment.yaml file, add the following:

编辑 templates/pushgateway-deployment.yaml 文件，添加如下内容：

编辑 templates/server-deployment.yaml 文件，添加如下内容：

4.4 修改 ingress apiVersion

再次安装如果报如下错：

Error: unable to build kubernetes objects from release manifest: unable to recognize "": no matches for kind "Ingress" in version "apps/v1"

编辑 templates/alertmanager-ingress.yaml 文件，将 apps/v1 修改为 extenstions/v1beta1：

4.5 验证 prometheus 安装

如果执行安装后，显示如下内容：

执行如下操作语句，如果出现如下结果，则说明安装成功：

helm list -n prometheus

但安装成功，并不代表运行成功。还需要做进一步的配置。

5 安装 nfs

如何安装 nfs 服务器，请参考本人《轻松完爆 nfs 安装》，不用担心，简单到爆，让你分分钟轻松完爆。

mkdir -p /data/nfs/prometheus/2g

mkdir -p /data/nfs/prometheus/8g

chmod 777 -R /data/nfs/prometheus

systemctl restart nfs

6 创建 pv

安装完 nfs 后，查看 prometheus pvc：

kubectl get pvc -n prometheus

发现 pvc 处于 pending 状态，原因在于并没有可用的 pv 可以使用，需要手动创建 pv。

发现 pvc 的申请规格有 2 种，分别是 2Gi 和 8Gi。下面分别创建 pv 资源文件，注意这里的 server 地址就是 nfs 服务器所在地址。

创建 pv-prometheus-2g.yaml 文件，内容如下：

apiVersion: v1

kind: PersistentVolume

metadata:

    name: prometheus-2g

spec:

    capacity:

        storage: 2Gi

    volumeMode: Filesystem

    accessModes:

    - ReadWriteOnce

    persistentVolumeReclaimPolicy: Retain

    nfs:

        server: 10.110.101.106

        path: /data/nfs/prometheus/2g

创建 pv-prometheus-8g.yaml 文件，内容如下：

apiVersion: v1

kind: PersistentVolume

metadata:

    name: prometheus-8g

spec:

    capacity:

        storage: 8Gi

    volumeMode: Filesystem

    accessModes:

    - ReadWriteOnce

    persistentVolumeReclaimPolicy: Retain

    nfs:

        server: 10.110.101.106

        path: /data/nfs/prometheus/8g

执行如下语句创建 pv：

kubectl apply -f pv-prometheus-2g.yaml

kubectl apply -f pv-prometheus-8g.yaml

查看 pvc 状态：

kubectl get pvc -n prometheus

自此，pvc 和 pv 已经关联。

7 验证 prometheus

查看 prometheus pod 运行状态，发现 prometheus-server 并没有启动成功：

kubectl get pod -n prometheus

查看容器日志状态发现报如下错误：

err="Error loading config couldn't load configuration (--config.file=/etc/config/prometheus.yml): parsing YAML file /etc/config/prometheus.yml: yaml: line 160: mapping values are not allowed in this context"