xuyuji9000 / kubernetes-playground

kubernetes-playground

• deprecated-workshops

• podman

• aks

• service

kubernetes-playground's Issues

Understand kubernetes service loadBalancerSourceRanges

Context

Kubernetes version: 1.20.9

Introduction

This issues to used to learn loadBalancerSourceRanges field in kubernetes service yaml.

Reference

• kubernetes/kubernetes

• kubernetes/cloud-provider

This repo provide the GetLoadBalancerSourceRanges function

• kubernetes/legacy-cloud-providers

This repo consumes GetLoadBalancerSourceRanges function

https for ingress

Get better understanding of the technology stack concerning Kubernetes

Q: 什么是Kubernetes的“底层”?

A： 为了“持续部署”这个目标，所有涉及的变量。 例如：

• 底层是OS，在阿里云上通过ROS来构建VM image

• Kubernetes这一层构建在OS之上

• Kubernetes之上的工具

  • Package management: Helm

  • CD: Jenkins / Argo

  • Debugging / Profiling: Istios

  • Monitoring: Prometheus

  • Logging: ElasticSearch / Loki

• 对不同基础设施环境，不同语言，不同框架的部署方式的理解

Use helm template to parameterize the yaml file

understand configmap

Create a new workshop to understand configmap.

use helm create jenkins on minikube

Workshop-3

Understand the list api resources.

NAME                              SHORTNAMES   APIGROUP                       NAMESPACED   KIND
bindings                                                                      true         Binding
componentstatuses                 cs                                          false        ComponentStatus
configmaps                        cm                                          true         ConfigMap
endpoints                         ep                                          true         Endpoints
events                            ev                                          true         Event
limitranges                       limits                                      true         LimitRange
namespaces                        ns                                          false        Namespace
nodes                             no                                          false        Node
persistentvolumeclaims            pvc                                         true         PersistentVolumeClaim
persistentvolumes                 pv                                          false        PersistentVolume
pods                              po                                          true         Pod
podtemplates                                                                  true         PodTemplate
replicationcontrollers            rc                                          true         ReplicationController
resourcequotas                    quota                                       true         ResourceQuota
secrets                                                                       true         Secret
serviceaccounts                   sa                                          true         ServiceAccount
services                          svc                                         true         Service
mutatingwebhookconfigurations                  admissionregistration.k8s.io   false        MutatingWebhookConfiguration
validatingwebhookconfigurations                admissionregistration.k8s.io   false        ValidatingWebhookConfiguration
customresourcedefinitions         crd,crds     apiextensions.k8s.io           false        CustomResourceDefinition
apiservices                                    apiregistration.k8s.io         false        APIService
controllerrevisions                            apps                           true         ControllerRevision
daemonsets                        ds           apps                           true         DaemonSet
deployments                       deploy       apps                           true         Deployment
replicasets                       rs           apps                           true         ReplicaSet
statefulsets                      sts          apps                           true         StatefulSet
tokenreviews                                   authentication.k8s.io          false        TokenReview
localsubjectaccessreviews                      authorization.k8s.io           true         LocalSubjectAccessReview
selfsubjectaccessreviews                       authorization.k8s.io           false        SelfSubjectAccessReview
selfsubjectrulesreviews                        authorization.k8s.io           false        SelfSubjectRulesReview
subjectaccessreviews                           authorization.k8s.io           false        SubjectAccessReview
horizontalpodautoscalers          hpa          autoscaling                    true         HorizontalPodAutoscaler
cronjobs                          cj           batch                          true         CronJob
jobs                                           batch                          true         Job
certificatesigningrequests        csr          certificates.k8s.io            false        CertificateSigningRequest
leases                                         coordination.k8s.io            true         Lease
events                            ev           events.k8s.io                  true         Event
daemonsets                        ds           extensions                     true         DaemonSet
deployments                       deploy       extensions                     true         Deployment
ingresses                         ing          extensions                     true         Ingress
networkpolicies                   netpol       extensions                     true         NetworkPolicy
podsecuritypolicies               psp          extensions                     false        PodSecurityPolicy
replicasets                       rs           extensions                     true         ReplicaSet
networkpolicies                   netpol       networking.k8s.io              true         NetworkPolicy
poddisruptionbudgets              pdb          policy                         true         PodDisruptionBudget
podsecuritypolicies               psp          policy                         false        PodSecurityPolicy
clusterrolebindings                            rbac.authorization.k8s.io      false        ClusterRoleBinding
clusterroles                                   rbac.authorization.k8s.io      false        ClusterRole
rolebindings                                   rbac.authorization.k8s.io      true         RoleBinding
roles                                          rbac.authorization.k8s.io      true         Role
priorityclasses                   pc           scheduling.k8s.io              false        PriorityClass
storageclasses                    sc           storage.k8s.io                 false        StorageClass
volumeattachments                              storage.k8s.io                 false        VolumeAttachment

Understand k8s network

What are the Networks?

• Pod

• Service

• Ingress / Load Balancer

---

What to understand?

• Reasoning of the architectural decision

• Underlying technology

Setup Jenkins without helm

Current issue branched from #20

Dig deeper on container runtime

Questions

• What are the responsibilities of container runtime?

Reference

• What are container runtimes?
• The differences between Docker, containerd, CRI-O and runc

  The explanation of the relationship between containerd and runc is helpful.

• containerd architecture

deploy prometheus with kubernetes to save cost

Add Kubernetes jenkins executor

meeting error

Waiting for next available executor

during building on Jenkins

Dig about minikube architecture

Deploy kubernetes with Helm on aliyun

Jenkins reverse proxy error

Deploy hello-world service to AKS

Create a simple "Hello World" Node.js service.

Member under hust-sh organization work on Jenkins fluently

Question:

Answer:

Helm Jekins restart super slow

use customInitContainers replace the existing slow initContainer

Learn about ingress

To save the money of using loadbalancer.

Deploy Jenkins on Aliyun Kubernetes with Persistent Volume

Play with Kops

have a better understand of helm

Setup kubernetes cluster on Qingcloud

Create a service with nginx.

#6

Protect Jenkins with https

PFX_FILE=
openssl pkcs12 -in ${PFX_FILE} -nocerts -nodes | sed -ne '/-BEGIN PRIVATE KEY-/,/-END PRIVATE KEY-/p' > clientcert.key
openssl pkcs12 -in ${PFX_FILE} -clcerts -nokeys | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' >  clientcert.cer
openssl pkcs12 -in ${PFX_FILE} -cacerts -nokeys -chain | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' >  cacerts.cer

Dig deeper on cgroups and namespaces

• Namespace provide separate processes

• cgroups limit the resource to groups of processes.

Reference

• What Are Namespaces and cgroups, and How Do They Work?

helm "Unauthorized" error

joamarukichis-MacBook-puro:kubernetes-playground yogiman$ helm list
Error: Unauthorized

Is it possible to build container image without Docker

Reference

• Docker Images Without Docker — A Practical Guide

This article contemplates the usage of Buildah & Podman

• Buildah

This tool build container images

Podman architecture on MacOS

Reference

• How Podman runs on Macs and other container FAQs

Deploy Argo

kubectl create namespace argo
kubectl apply -n argo -f https://raw.githubusercontent.com/argoproj/argo/stable/manifests/install.yaml