Kubernetes and CNCF Landscape 101
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Una intro sui concetti base di k8s e come sono implementati dall'ecosistema della Cloud Native Computing Foundation
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Kubernetes and CNCF Landscape 101
- 1. Kubernetes and CNCF Landscape 101 Giulio Roggero Founder and CTO Mia-Platform
- 6. Process 6 Un sistema operativo gestisce processi, schedulandoli e fornendogli le risorse per funzionare in modo corretto
- 7. Process 7 Cosa ha bisogno di un processo per girare?
- 8. Process 8 CPU per far girare le logiche
- 9. Process 9 Memoria per gestire i dati in modo veloce
- 10. Process 10 Disco per salvare i dati in modo persistente
- 11. Process 11 Networking per poter comunicare con l’esterno
- 12. Process ProcessProcess 12 I processi sono più di uno alla vota, centinaia!
- 13. A B C Se avessi più macchine?
- 14. A B C Process ProcessProcess … e volessi distribuire i processi su più macchine
- 15. A B C Process ProcessProcess Ho bisogno di 2 repliche Ho bisogno di 4 repliche Ho bisogno di 3 repliche … e volessi replicarli?
- 17. A B C Process Orchestration 2 instances Process Scheduling
- 18. A B C Process Orchestration 2 instances Process Scheduling Go on A and B
- 19. ProcessProcess A B C Process Orchestration 2 instances Process Scheduling Go on A and B
- 20. Process Process ProcessProcess Process A B C Process Orchestration 2 instances 3 instances Process Scheduling Go on A and B Go on A and B
- 21. Process Process ProcessProcessProcess ProcessProcess ProcessProcess A B C Process Orchestration 2 instances 3 instances 4 instances Process Scheduling Go on A and B Go on A and B Go on A and C
- 22. Process Process ProcessProcessProcess ProcessProcess ProcessProcess A is broken! B C Process Orchestration 2 instances 3 instances 4 instances Process Scheduling Go on A and B Go on A and B Go on A and C
- 23. Process Process ProcessProcessProcess ProcessProcessProcess Process A is broken! B C Process Orchestration 2 instances 3 instances 4 instances Process Scheduling Go on B Go on B and C Go on B and C I processi sono rischedulati in automatico e in modo trasparente
- 24. 24
- 25. Come funziona nel dettaglio 25
- 26. 26 Per maggiori dettagli si rimanda alla documentazione ufficiale di Kubernetes https://kubernetes.io/docs/concepts/overview/components/
- 27. Un cluster k8s è 27
- 28. A B C
- 35. 35 Distro, Hosting, Installer e PaaS di K8S https://landscape.cncf.io/
- 36. 36 Distro, Hosting, Installer e PaaS di K8S https://landscape.cncf.io/
- 37. Come configuro un pod su k8s? 37
- 53. 53Tutte le risorse: https://kubernetes.io/docs/reference/kubectl/overview/
- 54. 54Tutte le risorse: https://kubernetes.io/docs/reference/kubectl/overview/
- 55. 55
- 56. 56
- 59. 59 Kubernetes Namespace Worker Node Worker Node Worker Node Git Repo Code Pipeline Docker Registry Image
- 60. 60 Kubernetes Namespace Worker Node Worker Node Worker Node Git Repo Code Pipeline Docker Registry Image yaml conf
- 61. 61 Kubernetes Namespace Worker Node Worker Node Worker Node Git Repo Code yaml conf Pipeline Docker Registry Image Pipeline apply -f .yaml
- 62. 62 Kubernetes Namespace Worker Node Worker Node Worker Node Git Repo Code Yaml conf Pipeline Docker Registry Image Pipeline apply -f .yaml pull
- 63. 63 Kubernetes Namespace Worker Node Worker Node Worker Node Git Repo Code Yaml conf Pipeline Docker Registry Image Pipeline apply -f .yaml Pod
- 64. 64
- 65. 65
- 67. 67 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service /-/ready È pronto per ricevere traffico? readinessProbe https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/
- 68. 68 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service /-/ready La readiness dice ok! readinessProbe https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/
- 69. 69 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service /-/ready Il service manda il traffico al Pod! readinessProbe https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/
- 70. 70 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service /-/ready Se ci mette molto tempo è consigliabile aggiungere la startup Probe che aspetta anche minuti prima che si avvii il servizio e poi passa alla readiness https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ startupProbe
- 71. 71 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service /-/ready https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/healthz È in salute? livenessProbe Quando è tutto funzionante è bene chiedersi se il servizio è sempre attivo e risponde nei tempi
- 72. 72 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service /-/ready https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/healthz Al momento sì! La liveness probe funziona correttamente livenessProbe
- 73. 73 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service /-/ready https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/healthz Se smette di rispondere va in KO livenessProbe
- 74. 74 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service /-/ready https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/healthz k8s riavvia il Pod Restart! livenessProbe
- 75. 75 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service /-/ready https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/healthz e il traffico non è più indirizzato Restart! livenessProbe
- 76. 76 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service /-/ready https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/healthz Tutte le rotte non rispondono restarting... livenessProbe
- 79. 79 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service /-/ready https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/healthz Tutto di nuovo funzionante livenessProbe
- 80. Metriche 80
- 81. 81 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/metrics Possiamo esporre delle misure che vengono prese in pull da un servizio che le salva su DB e consente di graficare nel tempo le metriche. Es: ● Messaggi scodati ● Pagamenti effettuati ● Utenti attivi ● ecc...
- 82. 82 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/metrics Possiamo esporre delle misure che vengono prese in pull da un servizio che le salva su DB e consente di graficare nel tempo le metriche. Es: ● Messaggi scodati ● Pagamenti effettuati ● Utenti attivi ● ecc... Metric Collector DB
- 83. 83 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/metrics Possiamo esporre delle misure che vengono prese in pull da un servizio che le salva su DB e consente di graficare nel tempo le metriche. Es: ● Messaggi scodati ● Pagamenti effettuati ● Utenti attivi ● ecc... Metric Collector DB Dashboards
- 84. 84 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/metrics Metric Collector DB Dashboards Posso costruire degli allarmi sulle metriche applicando anche tecniche di Machine Learning. Msg in queue > 1000
- 85. 85 Kubernetes Namespace Worker Node Worker Node Worker Node Service https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/metrics Metric Collector DB Dashboards E posso decidere di far scalare i pod nel caso è necessario scodare di più Msg in queue > 1000 scale! Pod
- 86. 86 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/metrics Metric Collector DB Dashboards Msg in queue > 1000 PodPod scale! E posso decidere di far scalare i pod nel caso è necessario scodare di più
- 87. 87 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ /-/metrics Metric Collector DB Dashboards Msg in queue > 1000 PodPod E l’allarme rientra
- 88. 88
- 89. 89
- 90. Logs 90
- 91. 91 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ I log vanno su stdout log stdout
- 92. 92 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ Logs collector DB Possono essere mandati ad un collettore che li salva ordinati su un db per fare analisi e allarmi. log stdout
- 93. 93 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ Logs collector DB Dashboards Possono essere aggregati in dashboard per capire il comportamento degli applicativi log stdout
- 94. 94 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ Logs collector DB Dashboards 499 response code E si possono definire allarmi sui log log stdout
- 95. 95
- 96. 96
- 97. Tracing 97
- 98. 98 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ Se voglio vedere tutte le chiamate interne ad un servizio utilizzo il tracing
- 100. 100 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ Collector DBinstrumentation Dashboards E a questo punto posso raccogliere tutte le informazioni di tracing di tutte le chiamate tra servizi e tutti i metodi interni dei servizi.
- 101. 101
- 102. 102
- 103. Canary Release 103
- 104. 104 Canary Deploy Gateway /api/* Products Namespace Catalogue Purchase Namespace Cart Payment Gateway Pricing Namespace Pricing
- 105. 105 Canary Deploy Gateway /api/* Products Namespace Catalogue Purchase Namespace Cart Payment Gateway Pricing Namespace Pricing
- 106. 106 Canary Deploy Gateway /api/* Products Namespace Catalogue Purchase Namespace Cart Payment Gateway Pricing Namespace Pricing
- 107. 107 Canary Deploy Gateway /api/* Products Namespace Catalogue Purchase Namespace Cart Payment Gateway Pricing Namespace Pricing
- 108. 108 Canary Deploy Gateway /api/* Products Namespace Catalogue Purchase Namespace Cart Payment Gateway Pricing Namespace Pricing v1 Pricing v2Come farli convivere?
- 109. 109 Canary Deploy Gateway /api/* Products Namespace Catalogue Proxy Purchase Namespace Cart Proxy Payment Gateway Proxy Pricing Namespace Pricing v1 Proxy Pricing v2 Proxy
- 110. 110 Canary Deploy Gateway /api/* Products Namespace Catalogue Proxy Purchase Namespace Cart Proxy Payment Gateway Proxy Pricing Namespace Pricing v1 Proxy Pricing v2 Proxy
- 111. 111 Canary Deploy Gateway /api/* Products Namespace Catalogue Proxy Purchase Namespace Cart Proxy Payment Gateway Proxy Pricing Namespace Pricing v1 Proxy Pricing v2 Proxy90%
- 112. 112 Canary Deploy Gateway /api/* Products Namespace Catalogue Proxy Purchase Namespace Cart Proxy Payment Gateway Proxy Pricing Namespace Pricing v1 Proxy Pricing v2 Proxy 10% 90%
- 113. 113 Canary Deploy Gateway /api/* Products Namespace Catalogue Proxy Purchase Namespace Cart Proxy Payment Gateway Proxy Pricing Namespace Pricing v1 Proxy Pricing v2 Proxy User-agent iPhone User-agent Android
- 114. 114
- 115. 115
- 116. Lo schema finale 116
- 117. 117 Kubernetes Namespace Worker Node Worker Node Worker Node Pod Service Kubernetes Distro Sidecars
- 121. Da dove posso iniziare? 121