在KubeSphere启用基于Jenkins的DevOps
在KubeSphere启用基于Jenkins的DevOps
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DevOps概述
参考KubeSphere官网：https://kubesphere.com.cn/docs/v3.3/devops-user-guide/devops-overview/overview/
DevOps 是一系列做法和工具，可以使 IT 和软件开发团队之间的流程实现自动化。其中，随着敏捷软件开发日趋流行，持续集成 (CI) 和持续交付 (CD) 已经成为该领域一个理想的解决方案。在 CI/CD 工作流中，每次集成都通过自动化构建来验证，包括编码、发布和测试，从而帮助开发者提前发现集成错误，团队也可以快速、安全、可靠地将内部软件交付到生产环境。
不过，传统的 Jenkins Controller-Agent 架构（即多个 Agent 为一个 Controller 工作）有以下不足。
- 如果 Controller 宕机，整个 CI/CD 流水线会崩溃。
- 资源分配不均衡，一些 Agent 的流水线任务 (Job) 出现排队等待，而其他 Agent 处于空闲状态。
- 不同的 Agent 可能配置环境不同，并需要使用不同的编码语言。这种差异会给管理和维护带来不便。
了解 KubeSphere DevOps
KubeSphere DevOps 项目支持源代码管理工具，例如 GitHub、Git 和 SVN。用户可以通过图形编辑面板 (Jenkinsfile out of SCM) 构建 CI/CD 流水线，或者从代码仓库 (Jenkinsfile in SCM) 创建基于 Jenkinsfile 的流水线。
功能
KubeSphere DevOps 系统为您提供以下功能：
- 独立的 DevOps 项目，提供访问可控的 CI/CD 流水线。
- 开箱即用的 DevOps 功能，无需复杂的 Jenkins 配置。
- 支持 Source-to-image (S2I) 和 Binary-to-image (B2I)，快速交付镜像。
- 基于 Jenkinsfile 的流水线，提供一致的用户体验，支持多个代码仓库。
- 图形编辑面板，用于创建流水线，学习成本低。
- 强大的工具集成机制，例如 SonarQube，用于代码质量检查。
KubeSphere CI/CD 流水线工作流
KubeSphere CI/CD 流水线基于底层 Kubernetes Jenkins Agent 而运行。这些 Jenkins Agent 可以动态扩缩，即根据任务状态进行动态供应或释放。Jenkins Controller 和 Agent 以 Pod 的形式运行在 KubeSphere 节点上。Controller 运行在其中一个节点上，其配置数据存储在一个持久卷声明中。Agent 运行在各个节点上，但可能不会一直处于运行状态，而是根据需求动态创建并自动删除。
当 Jenkins Controller 收到构建请求，会根据标签动态创建运行在 Pod 中的 Jenkins Agent 并注册到 Controller 上。当 Agent 运行完任务后，将会被释放，相关的 Pod 也会被删除。
动态供应 Jenkins Agent
动态供应 Jenkins Agent 有以下优势：
资源分配合理：KubeSphere 动态分配已创建的 Agent 至空闲节点，避免因单个节点资源利用率高而导致任务排队等待。
高可扩缩性：当 KubeSphere 集群因资源不足而导致任务长时间排队等待时，您可以向集群新增节点。
高可用性：当 Jenkins Controller 故障时，KubeSphere 会自动创建一个新的 Jenkins Controller 容器，并将持久卷挂载至新创建的容器，保证数据不会丢失，从而实现集群高可用。
简言之，传统的Jenkins Controller-Agent 架构，容易出现常驻服务Controller宕机从而导致流水线无法启动的问题。K8S的Pod有故障重启机制，可以在Pod崩溃后自动重启，或者冗余多个pod实现高可用。作为有状态的应用，Jenkins会将状态数据持久化到挂载的持久卷中，从而实现状态的持久化保存及故障恢复后状态的一致性。
而Agent容易因资源分配不均衡的问题导致出现排队、空闲这种整体资源占用率很低的不良情况。忙的忙死闲的闲死显然是不利于充分榨干硬件性能。而K8S借助namespace、cgroup等技术，天生就很容易做资源隔离及资源分配。通过动态创建、销毁Agent的Pod实现Agent的动态供应，无状态的Agent通过这种方式充分压榨了硬件资源。
由于Containerd、Docker等Rni组件以容器的方式启动应用，容器内部可以有不同的运行时环境，K8S完全可以适配多种不同的配置、环境、编程语言，尤其与编程语言弱耦合，当运行在K8S的pod时，go编译的应用、Spring boot服务对外其实并没有太大区别。使用基于K8S的Jenkins，在部署多语言、多环境应用服务时，可以不用刻意关心语言、环境差异的影响，更加从容。
启动DevOps
官网文档：https://kubesphere.com.cn/docs/v3.3/pluggable-components/devops/
和之前启动服务网格Istio半差不差，改配置即可，对非专业运维的开发人员异常友好。
可以参考上一篇【启动Istio】：https://lizhiyong.blog.csdn.net/article/details/126380224
安装KubeSphere前配置启动
Linux安装KubeSphere时
修改kk创建的默认的配置文件：
vi config-sample.yaml
增加：
devops:
enabled: true # 将“false”更改为“true”。
此配置项会使kk在Linux安装K8S集群及KubeSphere时自动创建并启动DevOps相关的pod：
./kk create cluster -f config-sample.yaml
KubeKey相关的介绍及使用参考上篇，附带官网及GitHub地址。
K8S集群安装KubeSphere时
修改与上篇相同的cluster-configuration.yaml文件：
vi cluster-configuration.yaml
同样是修改此处：
devops:
enabled: true # 将“false”更改为“true”。
之后使用命令根据该yaml配置文件安装：
kubectl apply -f https://github.com/kubesphere/ks-installer/releases/download/v3.3.0/kubesphere-installer.yaml
kubectl apply -f cluster-configuration.yaml
之后根据该配置文件启用各种pod。
安装KubeSphere后配置启动
最常用的方式还是安装好基础的K8S集群及KubeSphere环境后再去web UI中修改配置文件。笔者使用KubeKey的All-in-one部署后，默认是没有启动DevOps的。笔者很好奇这次启动DevOps又会踩到什么坑。
找到clusterconfiguration的yaml并修改已经轻车熟路。
当前kk-install的yaml：
apiVersion: installer.kubesphere.io/v1alpha1
kind: ClusterConfiguration
metadata:
annotations:
kubectl.kubernetes.io/last-applied-configuration: >
{"apiVersion":"installer.kubesphere.io/v1alpha1","kind":"ClusterConfiguration","metadata":{"annotations":{},"labels":{"version":"v3.3.0"},"name":"ks-installer","namespace":"kubesphere-system"},"spec":{"alerting":{"enabled":false},"auditing":{"enabled":false},"authentication":{"jwtSecret":""},"common":{"core":{"console":{"enableMultiLogin":true,"port":30880,"type":"NodePort"}},"es":{"basicAuth":{"enabled":false,"password":"","username":""},"elkPrefix":"logstash","externalElasticsearchHost":"","externalElasticsearchPort":"","logMaxAge":7},"gpu":{"kinds":[{"default":true,"resourceName":"nvidia.com/gpu","resourceType":"GPU"}]},"minio":{"volumeSize":"20Gi"},"monitoring":{"GPUMonitoring":{"enabled":false},"endpoint":"http://prometheus-operated.kubesphere-monitoring-system.svc:9090"},"openldap":{"enabled":false,"volumeSize":"2Gi"},"redis":{"enabled":false,"volumeSize":"2Gi"}},"devops":{"enabled":false,"jenkinsJavaOpts_MaxRAM":"2g","jenkinsJavaOpts_Xms":"1200m","jenkinsJavaOpts_Xmx":"1600m","jenkinsMemoryLim":"2Gi","jenkinsMemoryReq":"1500Mi","jenkinsVolumeSize":"8Gi"},"edgeruntime":{"enabled":false,"kubeedge":{"cloudCore":{"cloudHub":{"advertiseAddress":[""]},"service":{"cloudhubHttpsNodePort":"30002","cloudhubNodePort":"30000","cloudhubQuicNodePort":"30001","cloudstreamNodePort":"30003","tunnelNodePort":"30004"}},"enabled":false,"iptables-manager":{"enabled":true,"mode":"external"}}},"etcd":{"endpointIps":"192.168.88.20","monitoring":false,"port":2379,"tlsEnable":true},"events":{"enabled":false},"logging":{"enabled":false,"logsidecar":{"enabled":true,"replicas":2}},"metrics_server":{"enabled":false},"monitoring":{"gpu":{"nvidia_dcgm_exporter":{"enabled":false}},"node_exporter":{"port":9100},"storageClass":""},"multicluster":{"clusterRole":"none"},"network":{"ippool":{"type":"none"},"networkpolicy":{"enabled":false},"topology":{"type":"none"}},"openpitrix":{"store":{"enabled":false}},"persistence":{"storageClass":""},"servicemesh":{"enabled":false,"istio":{"components":{"cni":{"enabled":false},"ingressGateways":[{"enabled":false,"name":"istio-ingressgateway"}]}}},"terminal":{"timeout":600},"zone":"cn"}}
labels:
version: v3.3.0
name: ks-installer
namespace: kubesphere-system
spec:
alerting:
enabled: false
auditing:
enabled: false
authentication:
jwtSecret: ''
common:
core:
console:
enableMultiLogin: true
port: 30880
type: NodePort
es:
basicAuth:
enabled: false
password: ''
username: ''
elkPrefix: logstash
externalElasticsearchHost: ''
externalElasticsearchPort: ''
logMaxAge: 7
gpu:
kinds:
- default: true
resourceName: nvidia.com/gpu
resourceType: GPU
minio:
volumeSize: 20Gi
monitoring:
GPUMonitoring:
enabled: false
endpoint: 'http://prometheus-operated.kubesphere-monitoring-system.svc:9090'
openldap:
enabled: false
volumeSize: 2Gi
redis:
enabled: false
volumeSize: 2Gi
devops:
enabled: false
jenkinsJavaOpts_MaxRAM: 2g
jenkinsJavaOpts_Xms: 1200m
jenkinsJavaOpts_Xmx: 1600m
jenkinsMemoryLim: 2Gi
jenkinsMemoryReq: 1500Mi
jenkinsVolumeSize: 8Gi
edgeruntime:
enabled: false
kubeedge:
cloudCore:
cloudHub:
advertiseAddress:
- ''
service:
cloudhubHttpsNodePort: '30002'
cloudhubNodePort: '30000'
cloudhubQuicNodePort: '30001'
cloudstreamNodePort: '30003'
tunnelNodePort: '30004'
enabled: false
iptables-manager:
enabled: true
mode: external
etcd:
endpointIps: 192.168.88.20
monitoring: false
port: 2379
tlsEnable: true
events:
enabled: false
logging:
enabled: false
logsidecar:
enabled: true
replicas: 2
metrics_server:
enabled: false
monitoring:
gpu:
nvidia_dcgm_exporter:
enabled: false
node_exporter:
port: 9100
storageClass: ''
multicluster:
clusterRole: none
network:
ippool:
type: none
networkpolicy:
enabled: false
topology:
type: none
openpitrix:
store:
enabled: false
persistence:
storageClass: ''
servicemesh:
enabled: true
istio:
components:
cni:
enabled: false
ingressGateways:
- enabled: false
name: istio-ingressgateway
terminal:
timeout: 600
zone: cn
可以看到默认的Jenkins配置是限制最大2G内存，预申请1.5G，存储卷8G。比较正常，笔者不修改了。
修改：
devops:
enabled: true # 将“false”更改为“true”。
确定保存后，使用root查看安装状态：
kubectl logs -n kubesphere-system $(kubectl get pod -n kubesphere-system -l 'app in (ks-install, ks-installer)' -o jsonpath='{.items[0].metadata.name}') -f
可以看到：
Start installing monitoring
Start installing multicluster
Start installing openpitrix
Start installing network
Start installing devops
Start installing servicemesh
**************************************************
Waiting for all tasks to be completed ...
task network status is successful (1/6)
task openpitrix status is successful (2/6)
task multicluster status is successful (3/6)
task servicemesh status is successful (4/6)
task monitoring status is successful (5/6)
task devops status is successful (6/6)
显然这是kk把所有组件又根据yaml重装了一遍。。。没什么软件问题是重启和重装系统解决不了的。。。
验证组件安装情况
执行：
root@zhiyong-ksp1:/home/zhiyong# kubectl get pod --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
argocd devops-argocd-application-controller-0 1/1 Running 0 9m25s
argocd devops-argocd-applicationset-controller-5864597bfc-pf8ht 1/1 Running 0 9m25s
argocd devops-argocd-dex-server-f885fb4b4-fkpls 1/1 Running 0 9m25s
argocd devops-argocd-notifications-controller-54b744556f-f4g24 1/1 Running 0 9m25s
argocd devops-argocd-redis-556fdd5876-xftmq 1/1 Running 0 9m25s
argocd devops-argocd-repo-server-5dbf9b87db-9tw2c 1/1 Running 0 9m25s
argocd devops-argocd-server-6f9898cc75-s7jkm 1/1 Running 0 9m25s
istio-system istiod-1-11-2-54dd699c87-99krn 1/1 Running 0 20h
istio-system jaeger-collector-67cfc55477-7757f 1/1 Running 5 (19h ago) 19h
istio-system jaeger-operator-fccc48b86-vtcr8 1/1 Running 0 20h
istio-system jaeger-query-8497bdbfd7-csbts 2/2 Running 0 19h
istio-system kiali-75c777bdf6-xhbq7 1/1 Running 0 19h
istio-system kiali-operator-c459985f7-sttfs 1/1 Running 0 20h
kube-system calico-kube-controllers-f9f9bbcc9-2v7lm 1/1 Running 2 (19h ago) 9d
kube-system calico-node-4mgc7 1/1 Running 2 (19h ago) 9d
kube-system coredns-f657fccfd-2gw7h 1/1 Running 2 (19h ago) 9d
kube-system coredns-f657fccfd-pflwf 1/1 Running 2 (19h ago) 9d
kube-system kube-apiserver-zhiyong-ksp1 1/1 Running 2 (19h ago) 9d
kube-system kube-controller-manager-zhiyong-ksp1 1/1 Running 2 (19h ago) 9d
kube-system kube-proxy-cn68l 1/1 Running 2 (19h ago) 9d
kube-system kube-scheduler-zhiyong-ksp1 1/1 Running 2 (19h ago) 9d
kube-system nodelocaldns-96gtw 1/1 Running 2 (19h ago) 9d
kube-system openebs-localpv-provisioner-68db4d895d-p9527 1/1 Running 1 (19h ago) 9d
kube-system snapshot-controller-0 1/1 Running 2 (19h ago) 9d
kubesphere-controls-system default-http-backend-587748d6b4-ccg59 1/1 Running 2 (19h ago) 9d
kubesphere-controls-system kubectl-admin-5d588c455b-82cnk 1/1 Running 2 (19h ago) 9d
kubesphere-devops-system devops-apiserver-6b468c95cb-9s7lz 1/1 Running 0 9m18s
kubesphere-devops-system devops-controller-667f8449d7-gjgj8 1/1 Running 0 9m18s
kubesphere-devops-system devops-jenkins-bf85c664c-c6qnq 1/1 Running 0 9m18s
kubesphere-devops-system s2ioperator-0 1/1 Running 0 9m18s
kubesphere-logging-system elasticsearch-logging-curator-elasticsearch-curator-2767784rhhk 0/1 Completed 0 20h
kubesphere-logging-system elasticsearch-logging-data-0 1/1 Running 0 20h
kubesphere-logging-system elasticsearch-logging-discovery-0 1/1 Running 0 20h
kubesphere-monitoring-system alertmanager-main-0 2/2 Running 4 (19h ago) 9d
kubesphere-monitoring-system kube-state-metrics-6d6786b44-bbb4f 3/3 Running 6 (19h ago) 9d
kubesphere-monitoring-system node-exporter-8sz74 2/2 Running 4 (19h ago) 9d
kubesphere-monitoring-system notification-manager-deployment-6f8c66ff88-pt4l8 2/2 Running 4 (19h ago) 9d
kubesphere-monitoring-system notification-manager-operator-6455b45546-nkmx8 2/2 Running 4 (19h ago) 9d
kubesphere-monitoring-system prometheus-k8s-0 2/2 Running 0 8m4s
kubesphere-monitoring-system prometheus-operator-66d997dccf-c968c 2/2 Running 4 (19h ago) 9d
kubesphere-system ks-apiserver-6b9bcb86f4-hsdzs 1/1 Running 2 (19h ago) 9d
kubesphere-system ks-console-599c49d8f6-ngb6b 1/1 Running 2 (19h ago) 9d
kubesphere-system ks-controller-manager-66747fcddc-r7cpt 1/1 Running 2 (19h ago) 9d
kubesphere-system ks-installer-5fd8bd46b8-dzhbb 1/1 Running 2 (19h ago) 9d
kubesphere-system minio-746f646bfb-hcf5c 1/1 Running 0 14m
kubesphere-system openldap-0 1/1 Running 1 (13m ago) 14m
这次居然一次性都启动了。。。
从这个慈眉善目的DevOps点进去：
发现所有系统组件全部启用，表面上没有任何问题。。。但是：
root@zhiyong-ksp1:/home/zhiyong# kubectl describe pod devops-jenkins-bf85c664c-c6qnq -n kubesphere-devops-system
Name: devops-jenkins-bf85c664c-c6qnq
Namespace: kubesphere-devops-system
Priority: 0
Node: zhiyong-ksp1/192.168.88.20
Start Time: Wed, 17 Aug 2022 21:08:28 +0800
Labels: app=devops-jenkins
chart=jenkins-0.19.3
component=devops-jenkins-master
heritage=Helm
pod-template-hash=bf85c664c
release=devops
Annotations: checksum/config: 094a3bf5a3dba2968646e2bacc5ab516c0562f2a0843997179c79f2d9be21438
cni.projectcalico.org/containerID: 61a3daa005a3f678176776fffdcf7fc9419d429051841c805738c61422e436ed
cni.projectcalico.org/podIP: 10.233.107.84/32
cni.projectcalico.org/podIPs: 10.233.107.84/32
Status: Running
IP: 10.233.107.84
IPs:
IP: 10.233.107.84
Controlled By: ReplicaSet/devops-jenkins-bf85c664c
Init Containers:
copy-default-config:
Container ID: containerd://205637c600ec1a4deab965f0a51c976e2215db945f0835e955c3409c04a68384
Image: registry.cn-beijing.aliyuncs.com/kubesphereio/ks-jenkins:v3.3.0-2.319.1
Image ID: registry.cn-beijing.aliyuncs.com/kubesphereio/ks-jenkins@sha256:c34e3f56f317197235f7d6e6582d531b09caa5c5f81bad21f4f8b4e432e44b7b
Port: <none>
Host Port: <none>
Command:
sh
/var/jenkins_config/apply_config.sh
State: Terminated
Reason: Completed
Exit Code: 0
Started: Wed, 17 Aug 2022 21:14:41 +0800
Finished: Wed, 17 Aug 2022 21:14:41 +0800
Ready: True
Restart Count: 0
Limits:
cpu: 1
memory: 2Gi
Requests:
cpu: 100m
memory: 1500Mi
Environment:
ADMIN_PASSWORD: <set to the key 'jenkins-admin-password' in secret 'devops-jenkins'> Optional: false
ADMIN_USER: <set to the key 'jenkins-admin-user' in secret 'devops-jenkins'> Optional: false
Mounts:
/usr/share/jenkins/ref/secrets/ from secrets-dir (rw)
/var/jenkins_config from jenkins-config (rw)
/var/jenkins_home from jenkins-home (rw)
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-md26x (ro)
Containers:
devops-jenkins:
Container ID: containerd://5b6d9d912cbe6b6c290619c753cb023ed2f135e0f079b174c4c2d45115d996c0
Image: registry.cn-beijing.aliyuncs.com/kubesphereio/ks-jenkins:v3.3.0-2.319.1
Image ID: registry.cn-beijing.aliyuncs.com/kubesphereio/ks-jenkins@sha256:c34e3f56f317197235f7d6e6582d531b09caa5c5f81bad21f4f8b4e432e44b7b
Ports: 8080/TCP, 50000/TCP
Host Ports: 0/TCP, 0/TCP
Args:
--argumentsRealm.passwd.$(ADMIN_USER)=$(ADMIN_PASSWORD)
--argumentsRealm.roles.$(ADMIN_USER)=admin
State: Running
Started: Wed, 17 Aug 2022 21:15:02 +0800
Ready: True
Restart Count: 0
Limits:
cpu: 1
memory: 2Gi
Requests:
cpu: 100m
memory: 1500Mi
Liveness: http-get http://:http/login delay=90s timeout=5s period=10s #success=1 #failure=12
Readiness: http-get http://:http/login delay=60s timeout=1s period=10s #success=1 #failure=3
Environment:
JAVA_TOOL_OPTIONS: -Xms1200m -Xmx1600m -XX:MaxRAM=2g -Dhudson.slaves.NodeProvisioner.initialDelay=20 -Dhudson.slaves.NodeProvisioner.MARGIN=50 -Dhudson.slaves.NodeProvisioner.MARGIN0=0.85 -Dhudson.model.LoadStatistics.clock=5000 -Dhudson.model.LoadStatistics.decay=0.2 -Dhudson.slaves.NodeProvisioner.recurrencePeriod=5000 -Dhudson.security.csrf.DefaultCrumbIssuer.EXCLUDE_SESSION_ID=true -Dio.jenkins.plugins.casc.ConfigurationAsCode.initialDelay=10000 -Djenkins.install.runSetupWizard=false -XX:+UseG1GC -XX:+UseStringDeduplication -XX:+ParallelRefProcEnabled -XX:+DisableExplicitGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
JENKINS_OPTS:
ADMIN_PASSWORD: <set to the key 'jenkins-admin-password' in secret 'devops-jenkins'> Optional: false
ADMIN_USER: <set to the key 'jenkins-admin-user' in secret 'devops-jenkins'> Optional: false
CASC_JENKINS_CONFIG: /var/jenkins_home/casc_configs/
CASC_MERGE_STRATEGY: override
com.sun.jndi.ldap.connect.timeout: 15000
com.sun.jndi.ldap.read.timeout: 60000
kubernetes.connection.timeout: 60000
kubernetes.request.timeout: 60000
EMAIL_SMTP_HOST: mail.example.com
EMAIL_SMTP_PORT: 465
EMAIL_USE_SSL: false
EMAIL_FROM_NAME: KubeSphere
EMAIL_FROM_ADDR: admin@example.com
EMAIL_FROM_PASS: P@ssw0rd
Mounts:
/usr/share/jenkins/ref/secrets/ from secrets-dir (rw)
/var/jenkins_config from jenkins-config (ro)
/var/jenkins_home from jenkins-home (rw)
/var/jenkins_home/casc_configs from casc-config (ro)
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-md26x (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
casc-config:
Type: ConfigMap (a volume populated by a ConfigMap)
Name: jenkins-casc-config
Optional: false
jenkins-config:
Type: ConfigMap (a volume populated by a ConfigMap)
Name: devops-jenkins
Optional: false
secrets-dir:
Type: EmptyDir (a temporary directory that shares a pod's lifetime)
Medium:
SizeLimit: <unset>
jenkins-home:
Type: PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
ClaimName: devops-jenkins
ReadOnly: false
kube-api-access-md26x:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional: <nil>
DownwardAPI: true
QoS Class: Burstable
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 32m default-scheduler Successfully assigned kubesphere-devops-system/devops-jenkins-bf85c664c-c6qnq to zhiyong-ksp1
Normal Pulling 32m kubelet Pulling image "registry.cn-beijing.aliyuncs.com/kubesphereio/ks-jenkins:v3.3.0-2.319.1"
Normal Pulled 26m kubelet Successfully pulled image "registry.cn-beijing.aliyuncs.com/kubesphereio/ks-jenkins:v3.3.0-2.319.1" in 6m11.516956987s
Normal Created 26m kubelet Created container copy-default-config
Normal Started 26m kubelet Started container copy-default-config
Normal Pulling 26m kubelet Pulling image "registry.cn-beijing.aliyuncs.com/kubesphereio/ks-jenkins:v3.3.0-2.319.1"
Normal Pulled 26m kubelet Successfully pulled image "registry.cn-beijing.aliyuncs.com/kubesphereio/ks-jenkins:v3.3.0-2.319.1" in 19.346314156s
Normal Created 26m kubelet Created container devops-jenkins
Normal Started 26m kubelet Started container devops-jenkins
Warning Unhealthy 24m (x5 over 25m) kubelet Readiness probe failed: HTTP probe failed with statuscode: 503
Warning Unhealthy 24m (x2 over 24m) kubelet Liveness probe failed: HTTP probe failed with statuscode: 503
Warning Unhealthy 24m (x2 over 24m) kubelet Readiness probe failed: Get "http://10.233.107.84:8080/login": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
root@zhiyong-ksp1:/home/zhiyong#
结尾可以看到三连警告。
排查Warning
不管表面上多么正常，warning是不能忽视的。按照warning的log，应该是探针访问http://10.233.107.84:8080/login超时了。从外部浏览器访问：
可以看出确实超时了。
但是在该Ubuntu访问相同的网站：
可以看到成功了。
使用CMD：
Microsoft Windows [版本 10.0.19044.1889]
(c) Microsoft Corporation。保留所有权利。
C:\Users\zhiyong>ping 10.233.107.84
正在 Ping 10.233.107.84 具有 32 字节的数据:
请求超时。
请求超时。
请求超时。
请求超时。
10.233.107.84 的 Ping 统计信息:
数据包: 已发送 = 4，已接收 = 0，丢失 = 4 (100% 丢失)，
C:\Users\zhiyong>
可以看出外部网络并不能ping通这个IP。
但是ssh的黑窗口：
root@zhiyong-ksp1:/home/zhiyong# ping 10.233.107.84
PING 10.233.107.84 (10.233.107.84) 56(84) bytes of data.
64 比特，来自 10.233.107.84: icmp_seq=1 ttl=64 时间=0.133 毫秒
64 比特，来自 10.233.107.84: icmp_seq=2 ttl=64 时间=0.074 毫秒
64 比特，来自 10.233.107.84: icmp_seq=3 ttl=64 时间=0.070 毫秒
64 比特，来自 10.233.107.84: icmp_seq=4 ttl=64 时间=0.087 毫秒
64 比特，来自 10.233.107.84: icmp_seq=5 ttl=64 时间=0.083 毫秒
64 比特，来自 10.233.107.84: icmp_seq=6 ttl=64 时间=0.050 毫秒
64 比特，来自 10.233.107.84: icmp_seq=7 ttl=64 时间=0.091 毫秒
64 比特，来自 10.233.107.84: icmp_seq=8 ttl=64 时间=0.057 毫秒
64 比特，来自 10.233.107.84: icmp_seq=9 ttl=64 时间=0.066 毫秒
64 比特，来自 10.233.107.84: icmp_seq=10 ttl=64 时间=0.072 毫秒
64 比特，来自 10.233.107.84: icmp_seq=11 ttl=64 时间=0.050 毫秒
64 比特，来自 10.233.107.84: icmp_seq=12 ttl=64 时间=0.051 毫秒
^C
--- 10.233.107.84 ping 统计 ---
已发送 12 个包， 已接收 12 个包, 0% 包丢失, 耗时 11244 毫秒
rtt min/avg/max/mdev = 0.050/0.073/0.133/0.022 ms
可以ping通该IP。
根据warning的log，可以看到admin的用户名和密码存在这个叫devops-jenkins的secret当中：
在Ubuntu中根据解密后的账号密码登录：
会失败。
根据官网文档：https://kubesphere.com.cn/docs/v3.3/faq/devops/install-jenkins-plugins/
执行：
root@zhiyong-ksp1:/home/zhiyong# export NODE_PORT=$(kubectl get --namespace kubesphere-devops-system -o jsonpath="{.spec.ports[0].nodePort}" services devops-jenkins)
root@zhiyong-ksp1:/home/zhiyong# export NODE_IP=$(kubectl get nodes --namespace kubesphere-devops-system -o jsonpath="{.items[0].status.addresses[0].address}")
root@zhiyong-ksp1:/home/zhiyong# echo http://$NODE_IP:$NODE_PORT
http://192.168.88.20:30180
可以看到需要用这个网址才能访问Jenkins：
而且最坑爹的是：
密码写死了是这个admin/P@88w0rd。。。使用这个外部可以登录成功：
Ubuntu内部也可以登录成功：
连通知3个和警告2个都一模一样。。。
此时：
root@zhiyong-ksp1:/home/zhiyong# kubectl describe pod devops-jenkins-bf85c664c-c6qnq -n kubesphere-devops-system
Name: devops-jenkins-bf85c664c-c6qnq
Namespace: kubesphere-devops-system
Priority: 0
Node: zhiyong-ksp1/192.168.88.20
Start Time: Wed, 17 Aug 2022 21:08:28 +0800
Labels: app=devops-jenkins
chart=jenkins-0.19.3
component=devops-jenkins-master
heritage=Helm
pod-template-hash=bf85c664c
release=devops
Annotations: checksum/config: 094a3bf5a3dba2968646e2bacc5ab516c0562f2a0843997179c79f2d9be21438
cni.projectcalico.org/containerID: 61a3daa005a3f678176776fffdcf7fc9419d429051841c805738c61422e436ed
cni.projectcalico.org/podIP: 10.233.107.84/32
cni.projectcalico.org/podIPs: 10.233.107.84/32
Status: Running
IP: 10.233.107.84
IPs:
IP: 10.233.107.84
Controlled By: ReplicaSet/devops-jenkins-bf85c664c
Init Containers:
copy-default-config:
Container ID: containerd://205637c600ec1a4deab965f0a51c976e2215db945f0835e955c3409c04a68384
Image: registry.cn-beijing.aliyuncs.com/kubesphereio/ks-jenkins:v3.3.0-2.319.1
Image ID: registry.cn-beijing.aliyuncs.com/kubesphereio/ks-jenkins@sha256:c34e3f56f317197235f7d6e6582d531b09caa5c5f81bad21f4f8b4e432e44b7b
Port: <none>
Host Port: <none>
Command:
sh
/var/jenkins_config/apply_config.sh
State: Terminated
Reason: Completed
Exit Code: 0
Started: Wed, 17 Aug 2022 21:14:41 +0800
Finished: Wed, 17 Aug 2022 21:14:41 +0800
Ready: True
Restart Count: 0
Limits:
cpu: 1
memory: 2Gi
Requests:
cpu: 100m
memory: 1500Mi
Environment:
ADMIN_PASSWORD: <set to the key 'jenkins-admin-password' in secret 'devops-jenkins'> Optional: false
ADMIN_USER: <set to the key 'jenkins-admin-user' in secret 'devops-jenkins'> Optional: false
Mounts:
/usr/share/jenkins/ref/secrets/ from secrets-dir (rw)
/var/jenkins_config from jenkins-config (rw)
/var/jenkins_home from jenkins-home (rw)
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-md26x (ro)
Containers:
devops-jenkins:
Container ID: containerd://5b6d9d912cbe6b6c290619c753cb023ed2f135e0f079b174c4c2d45115d996c0
Image: registry.cn-beijing.aliyuncs.com/kubesphereio/ks-jenkins:v3.3.0-2.319.1
Image ID: registry.cn-beijing.aliyuncs.com/kubesphereio/ks-jenkins@sha256:c34e3f56f317197235f7d6e6582d531b09caa5c5f81bad21f4f8b4e432e44b7b
Ports: 8080/TCP, 50000/TCP
Host Ports: 0/TCP, 0/TCP
Args:
--argumentsRealm.passwd.$(ADMIN_USER)=$(ADMIN_PASSWORD)
--argumentsRealm.roles.$(ADMIN_USER)=admin
State: Running
Started: Wed, 17 Aug 2022 21:15:02 +0800
Ready: True
Restart Count: 0
Limits:
cpu: 1
memory: 2Gi
Requests:
cpu: 100m
memory: 1500Mi
Liveness: http-get http://:http/login delay=90s timeout=5s period=10s #success=1 #failure=12
Readiness: http-get http://:http/login delay=60s timeout=1s period=10s #success=1 #failure=3
Environment:
JAVA_TOOL_OPTIONS: -Xms1200m -Xmx1600m -XX:MaxRAM=2g -Dhudson.slaves.NodeProvisioner.initialDelay=20 -Dhudson.slaves.NodeProvisioner.MARGIN=50 -Dhudson.slaves.NodeProvisioner.MARGIN0=0.85 -Dhudson.model.LoadStatistics.clock=5000 -Dhudson.model.LoadStatistics.decay=0.2 -Dhudson.slaves.NodeProvisioner.recurrencePeriod=5000 -Dhudson.security.csrf.DefaultCrumbIssuer.EXCLUDE_SESSION_ID=true -Dio.jenkins.plugins.casc.ConfigurationAsCode.initialDelay=10000 -Djenkins.install.runSetupWizard=false -XX:+UseG1GC -XX:+UseStringDeduplication -XX:+ParallelRefProcEnabled -XX:+DisableExplicitGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
JENKINS_OPTS:
ADMIN_PASSWORD: <set to the key 'jenkins-admin-password' in secret 'devops-jenkins'> Optional: false
ADMIN_USER: <set to the key 'jenkins-admin-user' in secret 'devops-jenkins'> Optional: false
CASC_JENKINS_CONFIG: /var/jenkins_home/casc_configs/
CASC_MERGE_STRATEGY: override
com.sun.jndi.ldap.connect.timeout: 15000
com.sun.jndi.ldap.read.timeout: 60000
kubernetes.connection.timeout: 60000
kubernetes.request.timeout: 60000
EMAIL_SMTP_HOST: mail.example.com
EMAIL_SMTP_PORT: 465
EMAIL_USE_SSL: false
EMAIL_FROM_NAME: KubeSphere
EMAIL_FROM_ADDR: admin@example.com
EMAIL_FROM_PASS: P@ssw0rd
Mounts:
/usr/share/jenkins/ref/secrets/ from secrets-dir (rw)
/var/jenkins_config from jenkins-config (ro)
/var/jenkins_home from jenkins-home (rw)
/var/jenkins_home/casc_configs from casc-config (ro)
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-md26x (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
casc-config:
Type: ConfigMap (a volume populated by a ConfigMap)
Name: jenkins-casc-config
Optional: false
jenkins-config:
Type: ConfigMap (a volume populated by a ConfigMap)
Name: devops-jenkins
Optional: false
secrets-dir:
Type: EmptyDir (a temporary directory that shares a pod's lifetime)
Medium:
SizeLimit: <unset>
jenkins-home:
Type: PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
ClaimName: devops-jenkins
ReadOnly: false
kube-api-access-md26x:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional: <nil>
DownwardAPI: true
QoS Class: Burstable
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events: <none>
此时虽然外部依旧不能通过那个网址访问Jenkins，但是探针也不再报错连接超时了。。。
最神奇的就是这个Jenkins的账号密码，既然是写死的，为何secret解密后还像模像样，不去翻官方文档怎么可能知道账号密码居然是这个和secret完全无关的玩意儿，也是深深地醉了。。。
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