运维监控报表太麻烦？用 Grafana-Reporter 一键搞定！
引言
为什么要部署这样的一个组件呢？前几天的早上，我们这边提出了一个需求，能否把 Grafana 的 Dashboard 生成为 PDF 文件呢，然后再发送到相应的邮件或者聊天软件，这样做的好处是，比较好玩吧，新鲜，好看，哈哈，开玩笑的。
既然提出了这样的需求，那肯定是咱有这个实力的，哈哈，自卖自夸。但总之，这个需求还是挺有意思的。我喜欢挑战，喜欢新技术。
这边折腾了会，就发现了 Grafan-reporter 这样一款组件。
介绍
Github地址：https://github.com/IzakMarais/reporter，对中文不支持，dashboard 中含有中文字符会报错。
首先介绍一下Grafana Image Renderer，它是一个用于将Grafana仪表盘转换为静态图像的插件。它提供了在Grafana中生成PNG、JPEG和SVG格式图像的功能，这些图像可以用于导出仪表盘的快照、生成报告、在文档中嵌入等用途。通过Grafana Image Renderer插件，用户可以通过简单的HTTP请求将特定的Grafana仪表盘转换为静态图像。用户可以指定要转换的仪表盘、图像的宽度和高度等参数，并通过HTTP响应获取图像的二进制数据。该插件在处理图像时还支持渲染时过滤器的应用，例如应用时间范围、自定义变量、主题等，以确保生成的图像准确地显示所需的数据和样式。
Grafana Image Renderer插件可以与其他工具和系统集成，例如将生成的图像嵌入到报告生成工具、文档管理系统或自定义的应用程序中。这样，用户就能够方便地分享、保存和展示Grafana仪表盘的快照，而无需访问Grafana本身。
Grafana Reporter 是一个基于Grafana的插件，用于生成和导出报告。它允许用户将Grafana中的监控数据和仪表盘内容导出为报告，以便与团队成员、管理层或其他人共享。Grafana Reporter支持导出为PDF、PNG、SVG和CSV等格式，可以定制报告的样式、布局和内容。用户可以设定报告的时间范围、图表和指标，并在报告中包含注释、摘要和其他信息。Grafana Reporter使用户能够以可视化和易读的方式展示和分享他们的监控数据。
部署
本环境采用 Kubernetes 安装，因为我喜欢用 Kubernetes，我看网上的文章几乎没有使用 Kubernetes 安装的。你也可以使用 Docker 或者 Docker-compose，又或者源码编译安装。
这边的监控采用的是 kube-prometheus-stack 的 Helm chart 安装，这边的重点不在安装 Prometheus，所以就直接跳过了。
因为有些信息比较敏感，这边的域名都做了修改。
部署 Grafana-reporter
这边使用 StatefulSet 部署，他这边需要指定下我们的 Grafana 的地址，还有我们的 Localtime 也需要修改为本地的。
复制
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: grafana-reporter
namespace: monitoring
labels:
app: grafana-reporter
spec:
replicas: 1
selector:
matchLabels:
app: grafana-reporter
serviceName: grafana-reporter
template:
metadata:
labels:
app: grafana-reporter
spec:
hostNetwork: true
containers:
- name: grafana-reporter
image: izakmarais/grafana-reporter
imagePullPolicy: Always
ports:
- containerPort: 8686
args:
- "-proto=https://"
- "-ip=grafana.example.com"
- "-ssl-check=true" # 如果 Grafana 使用了自签名证书,我这边因为有证书，所以就true了
volumeMounts:
- name: localtime
mountPath: /etc/localtime
readOnly: true
volumes:
- name: localtime
hostPath:
path: /etc/localtime
type: File1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.27.28.29.30.31.32.33.34.35.36.37.38.
我们还需要创建一个 Service：
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apiVersion: v1
kind: Service
metadata:
name: grafana-reporter
namespace: monitoring
labels:
app: grafana-reporter
spec:
selector:
app: grafana-reporter
ports:
- protocol: TCP
port: 8686
targetPort: 8686
type: ClusterIP1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.
再来一个 Ingress：
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apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: id-test-reporter
namespace: monitoring
spec:
ingressClassName: nginx
rules:
- host: reporter.example.com
http:
paths:
- backend:
service:
name: grafana-reporter
port:
number: 8686
path: /
pathType: ImplementationSpecific
tls:
- hosts:
- reporter.example.com
secretName: hiwin-test-ph-com-tls1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.
Apply 所有；
复制
kubectl apply -f .1.
我们来看下它的页面：
图片
这就算成功了。
部署 Grafana-image-render
这边使用 StatefulSet 控制器部署：
复制
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: grafana-image-renderer
namespace: monitoring
labels:
app: grafana-image-renderer
spec:
serviceName: grafana-image-renderer-headless
replicas: 1
selector:
matchLabels:
app: grafana-image-renderer
template:
metadata:
labels:
app: grafana-image-renderer
spec:
containers:
- name: renderer
image: grafana/grafana-image-renderer:latest
ports:
- containerPort: 8081
env:
- name: RENDERER_CALLBACK_URL
value: "https://grafana.example.com" # Grafana 服务地址1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.
service：
复制
apiVersion: v1
kind: Service
metadata:
name: grafana-image-renderer
namespace: monitoring
spec:
selector:
app: grafana-image-renderer
ports:
- protocol: TCP
port: 8081
targetPort: 8081
type: ClusterIP
---
apiVersion: v1
kind: Service
metadata:
name: grafana-image-renderer-headless
namespace: monitoring
spec:
selector:
app: grafana-image-renderer
ports:
- protocol: TCP
port: 8081
targetPort: 8081
clusterIP: None1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.27.
Ingress：
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apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: grafana-image-renderer-ingress
namespace: monitoring
annotations:
nginx.ingress.kubernetes.io/proxy-body-size: "50m" # 调整请求体大小限制
nginx.ingress.kubernetes.io/proxy-read-timeout: "300"
nginx.ingress.kubernetes.io/proxy-send-timeout: "300"
nginx.ingress.kubernetes.io/limit-connections: "50"
spec:
ingressClassName: nginx
rules:
- host: render.example.com # 替换为您自己的域名
http:
paths:
- path: /
pathType: ImplementationSpecific
backend:
service:
name: grafana-image-renderer-headless # 这边使用的是 Headless 服务
port:
number: 8081
tls:
- hosts:
- render.example.com
secretName: example-com-tls1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.27.28.
Apply 部署：
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kubectl apply -f .1.
测试一些是否有问题：
图片
可以看到，没有问题。
在一开始的部署中，我是不知道还需要部署 Grafana-image-render，所以当时因为这个，一直不能生成 PDF 文件。行了，往前看。
配置 Grafana
接下来我们配置下 Grafana，我们需要为 Grafana 添加下变量：
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apiVersion: apps/v1
kind: StatefulSet
metadata:
labels:
app.kubernetes.io/instance: kube-prometheus-stack
app.kubernetes.io/name: grafana
app.kubernetes.io/version: 11.3.1
helm.sh/chart: grafana-8.6.3
name: kube-prometheus-stack-grafana
namespace: monitoring
spec:
persistentVolumeClaimRetentionPolicy:
whenDeleted: Retain
whenScaled: Retain
podManagementPolicy: OrderedReady
replicas: 1
revisionHistoryLimit: 10
selector:
matchLabels:
app.kubernetes.io/instance: kube-prometheus-stack
app.kubernetes.io/name: grafana
serviceName: kube-prometheus-stack-grafana-headless
template:
metadata:
annotations:
checksum/config: e1e314c7fdc64d2ecfb41c8c9c1d43e5dbf8d4fc87a11b2373bfbba95ff86a24
checksum/dashboards-json-config: 01ba4719c80b6fe911b091a7c05124b64eeece964e09c058ef8f9805daca546b
checksum/sc-dashboard-provider-config: ce3cfbda1358535f70c551752a34e1d92271c95272f1891dfef8d65a403063e4
checksum/secret: f89c841c5ea6371a733417993185fefcf0760914325c94b37519ea2e919222a5
kubectl.kubernetes.io/default-container: grafana
labels:
app.kubernetes.io/instance: kube-prometheus-stack
app.kubernetes.io/name: grafana
app.kubernetes.io/version: 11.3.1
helm.sh/chart: grafana-8.6.3
spec:
automountServiceAccountToken: true
containers:
- env:
- name: METHOD
value: WATCH
- name: LABEL
value: grafana_dashboard
- name: LABEL_VALUE
value: "1"
- name: FOLDER
value: /tmp/dashboards
- name: RESOURCE
value: both
- name: NAMESPACE
value: ALL
- name: REQ_USERNAME
valueFrom:
secretKeyRef:
key: admin-user
name: kube-prometheus-stack-grafana
- name: REQ_PASSWORD
valueFrom:
secretKeyRef:
key: admin-password
name: kube-prometheus-stack-grafana
- name: REQ_URL
value: http://localhost:3000/api/admin/provisioning/dashboards/reload
- name: REQ_METHOD
value: POST
image: quay.io/kiwigrid/k8s-sidecar:1.28.0
imagePullPolicy: IfNotPresent
name: grafana-sc-dashboard
securityContext:
allowPrivilegeEscalation: false
capabilities:
drop:
- ALL
seccompProfile:
type: RuntimeDefault
volumeMounts:
- mountPath: /tmp/dashboards
name: sc-dashboard-volume
- env:
- name: METHOD
value: WATCH
- name: LABEL
value: grafana_datasource
- name: LABEL_VALUE
value: "1"
- name: FOLDER
value: /etc/grafana/provisioning/datasources
- name: RESOURCE
value: both
- name: REQ_USERNAME
valueFrom:
secretKeyRef:
key: admin-user
name: kube-prometheus-stack-grafana
- name: REQ_PASSWORD
valueFrom:
secretKeyRef:
key: admin-password
name: kube-prometheus-stack-grafana
- name: REQ_URL
value: http://localhost:3000/api/admin/provisioning/datasources/reload
- name: REQ_METHOD
value: POST
image: quay.io/kiwigrid/k8s-sidecar:1.28.0
imagePullPolicy: IfNotPresent
name: grafana-sc-datasources
securityContext:
allowPrivilegeEscalation: false
capabilities:
drop:
- ALL
seccompProfile:
type: RuntimeDefault
volumeMounts:
- mountPath: /etc/grafana/provisioning/datasources
name: sc-datasources-volume
- env:
- name: POD_IP
valueFrom:
fieldRef:
apiVersion: v1
fieldPath: status.podIP
- name: GF_SECURITY_ADMIN_USER
valueFrom:
secretKeyRef:
key: admin-user
name: kube-prometheus-stack-grafana
- name: GF_SECURITY_ADMIN_PASSWORD
valueFrom:
secretKeyRef:
key: admin-password
name: kube-prometheus-stack-grafana
- name: GF_PATHS_DATA
value: /var/lib/grafana/
- name: GF_PATHS_LOGS
value: /var/log/grafana
- name: GF_PATHS_PLUGINS
value: /var/lib/grafana/plugins
- name: GF_PATHS_PROVISIONING
value: /etc/grafana/provisioning
- name: GF_RENDERING_SERVER_URL # Grafana 将向该地址发送渲染请求，并由 Image Renderer 服务生成图片（例如 PNG、JPEG）
value: https://render.example.com
- name: GF_RENDERING_CALLBACK_URL # 当 Image Renderer 完成渲染任务后，它会将生成的图片或渲染结果回传给 Grafana
value: https://grafana.example.com
- name: GF_LOG_FILTERS
value: rendering:debug
image: docker.io/grafana/grafana:11.3.1
imagePullPolicy: IfNotPresent
livenessProbe:
httpGet:
path: /api/health
port: 3000
scheme: HTTP
initialDelaySeconds: 60
periodSeconds: 10
timeoutSeconds: 30
name: grafana
ports:
- containerPort: 3000
name: grafana
- containerPort: 9094
name: gossip-tcp
- containerPort: 9094
name: gossip-udp
readinessProbe:
httpGet:
path: /api/health
port: 3000
scheme: HTTP
periodSeconds: 10
timeoutSeconds: 1
volumeMounts:
- mountPath: /etc/grafana/grafana.ini
name: config
subPath: grafana.ini
- mountPath: /var/lib/grafana
name: storage
- mountPath: /tmp/dashboards
name: sc-dashboard-volume
- mountPath: /etc/grafana/provisioning/dashboards/sc-dashboardproviders.yaml
name: sc-dashboard-provider
subPath: provider.yaml
- mountPath: /etc/grafana/provisioning/datasources
name: sc-datasources-volume
initContainers:
- command:
- chown
- -R
- 472:472
- /var/lib/grafana
image: docker.io/library/busybox:1.31.1
imagePullPolicy: IfNotPresent
name: init-chown-data
securityContext:
capabilities:
add:
- CHOWN
runAsUser: 0
volumeMounts:
- mountPath: /var/lib/grafana
name: storage
restartPolicy: Always
securityContext:
fsGroup: 472
runAsUser: 472
serviceAccountName: kube-prometheus-stack-grafana
terminationGracePeriodSeconds: 30
volumes:
- configMap:
name: kube-prometheus-stack-grafana
name: config
- emptyDir: {}
name: sc-dashboard-volume
- configMap:
name: kube-prometheus-stack-grafana-config-dashboards
name: sc-dashboard-provider
- emptyDir: {}
name: sc-datasources-volume
updateStrategy:
rollingUpdate:
partition: 0
type: RollingUpdate
volumeClaimTemplates:
- metadata:
name: storage
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 20Gi
storageClassName: alicloud-nas-subpath1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.27.28.29.30.31.32.33.34.35.36.37.38.39.40.41.42.43.44.45.46.47.48.49.50.51.52.53.54.55.56.57.58.59.60.61.62.63.64.65.66.67.68.69.70.71.72.73.74.75.76.77.78.79.80.81.82.83.84.85.86.87.88.89.90.91.92.93.94.95.96.97.98.99.100.101.102.103.104.105.106.107.108.109.110.111.112.113.114.115.116.117.118.119.120.121.122.123.124.125.126.127.128.129.130.131.132.133.134.135.136.137.138.139.140.141.142.143.144.145.146.147.148.149.150.151.152.153.154.155.156.157.158.159.160.161.162.163.164.165.166.167.168.169.170.171.172.173.174.175.176.177.178.179.180.181.182.183.184.185.186.187.188.189.190.191.192.193.194.195.196.197.198.199.200.201.202.203.204.205.206.207.208.209.210.211.212.213.214.215.216.217.218.219.220.221.222.223.224.225.226.227.228.229.230.231.232.233.234.
等待更新完成后，可以测试一些是否有问题。
测试
如何测试呢，不要着急，跟紧我的步骤。
首先我们需要先在 Grafana 中创建一个 SA (serviceaccount)，用于授权和访问。
图片
图片
这边起个名字，再选择一个 Admin 的 Role ：
图片
创建完成之后，再创建一个 Token，保存好：
图片
接下来我们还需要获取到 Grafana Dashboard 的 ID，这边选择一个你想要生成 PDF 文件的 Dashboard：
然后进入，注意如何选择：
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https://grafana.example.com/d/efa86fd1d0c121a26444b636a3f509a8/kubernetes-compute-resources-cluster?orgId=1&from=now-1h&to=now&timeznotallow=utc&var-datasource=default&var-cluster=&refresh=10s1.
域名后面的 d/ 到下一个 / 之间的就是我们需要的 ID
图片
接下来我们开始真正的测试：
完成格式为：
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https://reporter.example.com/api/v5/report/alertmanager-overview?apitoken=glsa_M4a256mzUizdmdGsSNK8SZW7h9QfvhGr_6616e37c1.
我们来解析下：
https://reporter.example.com/
• 这个是你的 Grafana-reporter 的域名
api/v5/report/
• 这个是固定的格式，不能改
alertmanager-overview
• 这个也就是你的 Grafana Dashboard 的 ID
?apitoken=glsa_M4a256mzUizdmdGsSNK8SZW7h9QfvhGr_6616e37c
• 这个就是你的 Grafana SA 生成的 Token
接下来我们访问下，看下是否有问题。
可以看到失败了，为什么呢？我们来排查下：
提前说明下，我这边 kubectl 的命令都配置了 Alias。如果你也需要，请查看这篇文章。
进入容器复制
$ kgpo -nmonitoring
NAME READY STATUS RESTARTS AGE
alertmanager-kube-prometheus-stack-alertmanager-0 2/2 Running 0 19d
grafana-image-renderer-0 1/1 Running 0 156m
grafana-image-renderer-1 1/1 Running 0 156m
grafana-image-renderer-2 1/1 Running 0 156m
grafana-reporter-0 1/1 Running 0 92m
kube-prometheus-stack-grafana-0 3/3 Running 0 34m
kube-prometheus-stack-kube-state-metrics-5b58cf95c8-blv79 1/1 Running 0 19d
kube-prometheus-stack-operator-b48974f48-m59d2 1/1 Running 0 19d
prometheus-kube-prometheus-stack-prometheus-0 2/2 Running 0 19d
$ kex grafana-reporter-0 -nmonitoring -- bash
root@grafana-reporter-0:/# cd /tmp/ # 这个目录是它默认存放生成的 PDF 文件的位置
root@grafana-reporter-0:/tmp# ls
e4b21f3b-b031-4fa2-9443-a37f1095261e
root@grafana-reporter-0:/tmp# cd e4b21f3b-b031-4fa2-9443-a37f1095261e/
root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e# ls
images report.aux report.log report.tex
root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e# cd images/
root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e/images# ls
image2.png image3.png image5.png image6.png1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.
我们可以使用 file 这个命令查看一些这个文件的类型
复制
$ root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e/images# file image2.png
bash: file: command not found1.2.
那就安装下这个命令；
复制
$ root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e/images# apt update
Ign:1 http://deb.debian.org/debian stretch InRelease
Ign:2 http://security.debian.org/debian-security stretch/updates InRelease
Ign:3 http://deb.debian.org/debian stretch-updates InRelease
Err:4 http://security.debian.org/debian-security stretch/updates Release
404 Not Found [IP: 151.101.2.132 80]
Err:5 http://deb.debian.org/debian stretch Release
404 Not Found [IP: 199.232.46.132 80]
Err:6 http://deb.debian.org/debian stretch-updates Release
404 Not Found [IP: 199.232.46.132 80]
Reading package lists... Done
E: The repository http://security.debian.org/debian-security stretch/updates Release does not have a Release file.
N: Updating from such a repository cant be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository http://deb.debian.org/debian stretch Release does not have a Release file.
N: Updating from such a repository cant be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository http://deb.debian.org/debian stretch-updates Release does not have a Release file.
N: Updating from such a repository cant be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.
报错了，那就修改下。
问题是由于容器中的 apt 使用了一个过期的 Debian 软件源 (stretch)，这些源已经不再维护或者被替换，因此无法正确获取包列表
复制
$ root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e/images# echo "deb http://archive.debian.org/debian stretch main contrib non-free" > /etc/apt/sources.list
$ root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e/images# echo "deb http://archive.debian.org/debian-security stretch/updates main contrib non-free" >> /etc/apt/sources.list
# 安装
$ root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e/images# apt update
Ign:1 http://deb.debian.org/debian stretch InRelease
Ign:2 http://security.debian.org/debian-security stretch/updates InRelease
Ign:3 http://deb.debian.org/debian stretch-updates InRelease
Err:4 http://security.debian.org/debian-security stretch/updates Release
404 Not Found [IP: 151.101.2.132 80]
Err:5 http://deb.debian.org/debian stretch Release
404 Not Found [IP: 199.232.46.132 80]
Err:6 http://deb.debian.org/debian stretch-updates Release
404 Not Found [IP: 199.232.46.132 80]
Reading package lists... Done
E: The repository http://security.debian.org/debian-security stretch/updates Release does not have a Release file.
N: Updating from such a repository cant be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository http://deb.debian.org/debian stretch Release does not have a Release file.
N: Updating from such a repository cant be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository http://deb.debian.org/debian stretch-updates Release does not have a Release file.
N: Updating from such a repository cant be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
$ root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e/images# echo "deb http://archive.debian.org/debian stretch main contrib non-free" > /etc/apt/sources.list
$ root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e/images# echo "deb http://archive.debian.org/debian-security stretch/updates main contrib non-free" >> /etc/apt/sources.list
$ root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e/images# apt update
Ign:1 http://archive.debian.org/debian stretch InRelease
Get:2 http://archive.debian.org/debian-security stretch/updates InRelease [59.1 kB]
Get:3 http://archive.debian.org/debian stretch Release [118 kB]
Get:4 http://archive.debian.org/debian stretch Release.gpg [3177 B]
Get:5 http://archive.debian.org/debian-security stretch/updates/main amd64 Packages [782 kB]
Get:6 http://archive.debian.org/debian-security stretch/updates/non-free amd64 Packages [14.1 kB]
Get:7 http://archive.debian.org/debian-security stretch/updates/contrib amd64 Packages [1760 B]
Get:8 http://archive.debian.org/debian stretch/main amd64 Packages [7080 kB]
Get:9 http://archive.debian.org/debian stretch/contrib amd64 Packages [50.7 kB]
Get:10 http://archive.debian.org/debian stretch/non-free amd64 Packages [78.3 kB]
Fetched 8186 kB in 1s (6008 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
31 packages can be upgraded. Run apt list --upgradable to see them.
$ root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e/images# apt install -y file
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
libmagic-mgc libmagic1
The following NEW packages will be installed:
file libmagic-mgc libmagic1
0 upgraded, 3 newly installed, 0 to remove and 31 not upgraded.
Need to get 397 kB of archives.
After this operation, 5265 kB of additional disk space will be used.
Get:1 http://archive.debian.org/debian stretch/main amd64 libmagic-mgc amd64 1:5.30-1+deb9u3 [222 kB]
Get:2 http://archive.debian.org/debian stretch/main amd64 libmagic1 amd64 1:5.30-1+deb9u3 [111 kB]
Get:3 http://archive.debian.org/debian stretch/main amd64 file amd64 1:5.30-1+deb9u3 [64.2 kB]
Fetched 397 kB in 0s (4579 kB/s)
debconf: delaying package configuration, since apt-utils is not installed
Selecting previously unselected package libmagic-mgc.
(Reading database ... 6831 files and directories currently installed.)
Preparing to unpack .../libmagic-mgc_1%3a5.30-1+deb9u3_amd64.deb ...
Unpacking libmagic-mgc (1:5.30-1+deb9u3) ...
Selecting previously unselected package libmagic1:amd64.
Preparing to unpack .../libmagic1_1%3a5.30-1+deb9u3_amd64.deb ...
Unpacking libmagic1:amd64 (1:5.30-1+deb9u3) ...
Selecting previously unselected package file.
Preparing to unpack .../file_1%3a5.30-1+deb9u3_amd64.deb ...
Unpacking file (1:5.30-1+deb9u3) ...
Setting up libmagic-mgc (1:5.30-1+deb9u3) ...
Setting up libmagic1:amd64 (1:5.30-1+deb9u3) ...
Processing triggers for libc-bin (2.24-11+deb9u3) ...
Setting up file (1:5.30-1+deb9u3) ...
# 看一下这个文件
root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e/images# ls
image2.png image3.png image5.png image6.png
root@grafana-reporter-0:/tmp/e4b21f3b-b031-4fa2-9443-a37f1095261e/images# file image2.png
image2.png: ASCII text, with no line terminators1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.27.28.29.30.31.32.33.34.35.36.37.38.39.40.41.42.43.44.45.46.47.48.49.50.51.52.53.54.55.56.57.58.59.60.61.62.63.64.65.66.67.68.69.70.71.72.73.74.75.76.77.78.79.80.
可以看到，这是文本，不是 png 图片，所以问题是 grafana 没有成功调用到 Grafana-image-render，去生成相应的 PNG 图片。
我们这边再去看下我们的 Grafana 的 logs
复制
# 截取一部分 logs，看起来没有什么特别大的问题：
logger=rendering renderer=http t=2024-12-26T10:41:49.307925807Z level=debug msg="calling remote rendering service" url="https://render.example.com?deviceScaleFactor=1.000000&domain=grafana.example.com&encoding=png&height=500&renderKey=lFiW6KBBhrA8vY2BQ9OOXdPSZUU2FL5b&timeout=60&timeznotallow=&url=https%3A%2F%2Fgrafana.example.com%2Fd-solo%2Falertmanager-overview%2F_%3Ffrom%3Dnow-1h%26height%3D500%26panelId%3D2%26theme%3Dlight%26to%3Dnow%26width%3D1000%26render%3D1&width=1000"
logger=context userId=1 orgId=1 uname=admin t=2024-12-26T10:41:53.196481964Z level=info msg="Request Completed" method=GET path=/api/live/ws status=-1 remote_addr=127.0.0.1 time_ms=5 duratinotallow=5.670954ms size=0 referer= handler=/api/live/ws status_source=server
logger=live t=2024-12-26T10:41:53.389851883Z level=info msg="Initialized channel handler" channel=grafana/dashboard/uid/efa86fd1d0c121a26444b636a3f509a8 address=grafana/dashboard/uid/efa86fd1d0c121a26444b636a3f509a8
logger=rendering renderer=http t=2024-12-26T10:42:18.992113007Z level=info msg=Rendering path="d-solo/alertmanager-overview/_?from=now-1h&height=500&panelId=6&theme=light&to=now&width=1000" userID=2
logger=rendering renderer=http t=2024-12-26T10:42:18.995074149Z level=info msg=Rendering path="d-solo/alertmanager-overview/_?from=now-1h&height=500&panelId=2&theme=light&to=now&width=1000" userID=2
logger=rendering renderer=http t=2024-12-26T10:42:19.010142812Z level=debug msg="calling remote rendering service" url="https://render.example.com?deviceScaleFactor=1.000000&domain=grafana.example.com&encoding=png&height=500&renderKey=ElH0jx7AYodbbkv2lEzvV7Qf1OkeiRac&timeout=60&timeznotallow=&url=https%3A%2F%2Fgrafana.example.com%2Fd-solo%2Falertmanager-overview%2F_%3Ffrom%3Dnow-1h%26height%3D500%26panelId%3D6%26theme%3Dlight%26to%3Dnow%26width%3D1000%26render%3D1&width=1000"
logger=rendering renderer=http t=2024-12-26T10:42:19.011440398Z level=info msg=Rendering path="d-solo/alertmanager-overview/_?from=now-1h&height=500&panelId=5&theme=light&to=now&width=1000" userID=2
logger=rendering renderer=http t=2024-12-26T10:42:19.024147345Z level=debug msg="calling remote rendering service" url="https://render.example.com?deviceScaleFactor=1.000000&domain=grafana.example.com&encoding=png&height=500&renderKey=FGMPcxnruw1ZbPXEeH4v0BBrEeUSKvjR&timeout=60&timeznotallow=&url=https%3A%2F%2Fgrafana.example.com%2Fd-solo%2Falertmanager-overview%2F_%3Ffrom%3Dnow-1h%26height%3D500%26panelId%3D5%26theme%3Dlight%26to%3Dnow%26width%3D1000%26render%3D1&width=1000"
logger=rendering renderer=http t=2024-12-26T10:42:19.031615719Z level=info msg=Rendering path="d-solo/alertmanager-overview/_?from=now-1h&height=500&panelId=3&theme=light&to=now&width=1000" userID=2
logger=rendering renderer=http t=2024-12-26T10:42:19.044274424Z level=debug msg="calling remote rendering service" url="https://render.example.com?deviceScaleFactor=1.000000&domain=grafana.example.com&encoding=png&height=500&renderKey=a47WWfW9PiO75DoNSHKwfdMwPSeTIiNo&timeout=60&timeznotallow=&url=https%3A%2F%2Fgrafana.example.com%2Fd-solo%2Falertmanager-overview%2F_%3Ffrom%3Dnow-1h%26height%3D500%26panelId%3D3%26theme%3Dlight%26to%3Dnow%26width%3D1000%26render%3D1&width=1000"
logger=rendering renderer=http t=2024-12-26T10:42:19.105601469Z level=debug msg="calling remote rendering service" url="https://render.example.com?deviceScaleFactor=1.000000&domain=grafana.example.com&encoding=png&height=500&renderKey=KnO2tIXJg9EvhcbhfDjbadYxAqChU0eN&timeout=60&timeznotallow=&url=https%3A%2F%2Fgrafana.example.com%2Fd-solo%2Falertmanager-overview%2F_%3Ffrom%3Dnow-1h%26height%3D500%26panelId%3D2%26theme%3Dlight%26to%3Dnow%26width%3D1000%26render%3D1&width=1000"1.2.3.4.5.6.7.8.9.10.11.12.
我们来排查下，看一下我们的 Grafana 的 YAML 文件里面的 image-render 的地址，其它多余的就不看了，问题重要在这里，去 Google 了一会，发现我可能少一个路径 /render，这个是默认的，那我们就加上去，看下它是否 OK：
复制
k edit sts kube-prometheus-stack-grafana -nmonitoring
····
- name: GF_RENDERING_SERVER_URL
value: https://render.example.com/render
- name: GF_RENDERING_CALLBACK_URL
value: https://grafana.example.com
····1.2.3.4.5.6.7.
访问下：
图片
可以看到，我们成功了，如果你这边还有问题，可以查看下 Grafana 和 Grafana-reporter 的 logs。
阅读剩余
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