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"[WORKSHOP] K8S for developers", Denis Romanuk
The document discusses Kubernetes for developers, highlighting its evolution, components, and practical applications in managing and deploying containerized applications. It emphasizes the advantages of Kubernetes in enhancing team collaboration, creating Kubernetes-native apps, and providing a consistent interface for various infrastructures. Additionally, it touches on local development tools and offers support for tailored infrastructure solutions through AdvancedHosting.
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"[WORKSHOP] K8S for developers", Denis Romanuk
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- 2. Denis Romaniuk ➔ Privateand Public Cloud ➔ Dedicated and Managed servers ➔ Content Delivery Network (CDN) ➔ Servers management and Colocation ➔ DevOps as a service ➔ Managed Kubernetes (alpha-version) ➔ Managed Load Balancer (coming soon) AdvancedHosting Custom infrastructure for highload projects We use modern equipment, apply cutting-edge technologies, and ensure quality control to save time on technical aspects when working on the project. We design, create, and support infrastructure tailored to your specific needs, allowing you to concentrate on your business development. We help businesses cover all their needs in infrastructure services: from servers to fast content delivery worldwide.
- 3. Denis Romaniuk Table ofcontents Kubernetes for developers 1. Motivation 2. Evolution 3. Components 4. Helm 5. Installation 6. Local development 7. CRD and Operators
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- 6. Denis Romaniuk Why dodevelopers need Kubernetes? ● In-team relations ● Kubernetes is successor to Docker ● Kubernetes-native apps development ● Unified interface for any infrastructure
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- 29. Denis Romaniuk docker User Interface High-level library Low-level library Container ●manages and runs containers ● pushes and pulls images ● manages storage ● manages networking ● supervises the running of containers ● actually creates and runs containers ● intercommunicate with user containerd docker-cli runc cgroups
- 30. Denis Romaniuk kubernetes ● managesand runs containers ● pushes and pulls images ● manages storage ● manages networking ● supervises the running of containers ● actually creates and runs containers ● intercommunicate with user containerd docker-cli runc cgroups kubernetes
- 31. Denis Romaniuk kubernetes ● managesand runs containers ● pushes and pulls images ● manages storage ● manages networking ● supervises the running of containers ● actually creates and runs containers containerd runc cgroups kubernetes 1.20+
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- 36. Denis Romaniuk Volume ● EmptyDir ●ConfigMap ● Secret ● PersistentVolume /var/www/uploads .my.cnf /var/lib/mysql
- 37. Denis Romaniuk Volume ● EmptyDir ●ConfigMap ● Secret ● PersistentVolume .my.cnf /var/www/uploads /var/lib/mysql file https://stackoverflow.com/a/36925553/7427923 https://learn.hashicorp.com/tutorials/vault/kubernetes-external-vault https://kubernetes.io/docs/tasks/administer-cluster/encrypt-data/
- 38. Denis Romaniuk Volume ● EmptyDir ●ConfigMap ● Secret ● PersistentVolume .my.cnf /var/www/uploads /var/lib/mysql
- 39. Denis Romaniuk Mode: ● ReadWriteOnce ●ReadOnlyMany ● ReadWriteMany User Admin PersistentVolume Size: ● 1 GiB ● 10 GiB ● 100 GiB StorageClass: ● hdd ● ssd ● nvme
- 40. Denis Romaniuk ● 10GiB ● RWO ● ssd Mode: ● ReadWriteOnce ● ReadOnlyMany ● ReadWriteMany PersistentVolume Size: ● 1 GiB ● 10 GiB ● 100 GiB StorageClass: ● hdd ● ssd ● nvme
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- 43. Denis Romaniuk Recreate Deployment app app-d8sje04kvl app-89dff34kjpapp-54k18dfjg8 app-54k18dfjg8-fd17e app-54k18dfjg8-9fdj4 app-54k18dfjg8-0fk3s app-d8sje04kvl-f4s6e app-d8sje04kvl-l8fhj app-d8sje04kvl-j73b6 app-89dff34kjp-s85jd app-89dff34kjp-ki87d app-89dff34kjp-g36dl Rolling Update v0.5 v0.6 v0.7
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- 51. Denis Romaniuk Ingress Physical Layer DataLink Layer Network Layer Transport Layer Session Layer Presentation Layer Application Layer https://example.com/ 192.168.68.91 192.168.71.15 https://example.com/blog 192.168.95.11 https://example.com/shop 192.168.68.15 192.168.71.23 192.168.95.40 TCP/UDP HTTP 10.0.151.16 192.168.68.91 192.168.71.15 10.0.58.20 192.168.95.11 10.0.214.76 192.168.68.15 192.168.71.23 192.168.95.40
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- 54. Denis Romaniuk Some project php-fpm nginx mysqlredis IngressController
- 55. Denis Romaniuk Some project php-fpm nginx mysqlredis IngressController
- 56. Denis Romaniuk Some project php-fpm nginx mysqlredis IngressController
- 57. Denis Romaniuk Some project php-fpm nginx mysqlredis IngressController nginx-we8df0d3-fj9d3 nginx-we8df0d3-8gj47 php-fpm-kf8dp439-mfg70 php-fpm-kf8dp439-d7n34 mysql-0 mysql-1 redis-1 redis-0 ingress-controller-89fsd
- 58. Denis Romaniuk Some project php-fpm nginx mysqlredis nginx-we8df0d3-8gj47 php-fpm-kf8dp439-d7n34 mysql-1 redis-0 IngressController
- 59. Denis Romaniuk Some project php-fpm nginx mysqlredis nginx-we8df0d3-8gj47 php-fpm-kf8dp439-d7n34 mysql-1 redis-0 nginx php-fpm mysql redis ingress nginx-we8df0d3-fj9d3 php-fpm-kf8dp439-mfg70 mysql-0 redis-1
- 60. Denis Romaniuk Manifests Some project Resources Workload nginx-we8df0d3-8gj47 php-fpm-kf8dp439-d7n34 mysql-1redis-0 nginx php-fpm mysql redis ingress nginx-we8df0d3-fj9d3 php-fpm-kf8dp439-mfg70 mysql-0 redis-1
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- 63. Denis Romaniuk Users namespace release name Helm + golang template values.yaml = helm-chart + values.yaml =Manifests Release parameters + Vendors
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- 66. Denis Romaniuk K8S update logging/monitoring auth/security Cloud-nativesolutions Manifests deployment (incl. Helm) CRI, CNI, CSI, etc... API-server, etcd, kubelets VPS and private networks
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- 69. Denis Romaniuk Development solutions ProductionDevelopment Scale Availability Access
- 70. Denis Romaniuk Development solutions minikube ●Kubernetes community ● OS-agnostic ● Creates VM or Container microk8s ● Canonical community ● OS-agnostic ○ Snap store ● Uses process manager k3s ● Rancher community ● Linux ○ Platform-agnostic ● Embeded-binaries
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- 73. Denis Romaniuk CRD andOperators
- 74. Denis Romaniuk cert-manager Order Challenge Certificate Issuer CertificateRequest CSR-requestACME certificate order HTTP challenge DNS challenge Operator
- 75. Denis Romaniuk Vanilla kubernetesobjects Custom Resource Definitions ACME Only cert-manager Order Certificate Issuer CertificateRequest Operator Challenge
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- 77. Want to bethe first to get the alpha-version? Contact us right now! Also, you can get a ready solution for your project. We are always ready to provide our products for free trial. advancedhosting.com Nikolay Yavorovskyi Product Manager live:ah.002022 ahnick nikolay.yavorovskyi@advanced.host