Kubernetes provisioning

#Kubernetes #Provisioning

카카오에서는 쿠버네티스를 서비스하기 위해 DKOS를 사용하고 있습니다.

본 세션에서는 DKOS가 쿠버네티스를 서비스 하기 위해, 고려하였던 프로비저닝 툴들과 선택을 시작으로, 시행착오를 거쳐,
프로비저닝 툴을 걷어내기까지의 여정을 공유 드리고자 합니다.

감사합니다

발표자 : rookie.jeon
카카오에서 클라우드 플랫폼을 개발하고 있는 루키입니다.

Transcript

1. ੹޹୍ rookie.jeon ஠஠য় Copyright 2022. Kakao Corp. All rights reserved. Redistribution or public display is not permitted without written permission from Kakao. Kubernetes provisioning if(kakao)2022 ೐۽࠺੷׬ ోҗ੄ ݅թࠗఠ ೻য૗ө૑ . . .
2. ஠஠য়ীࢲ ௢ߡ֎౭झܳ ࢲ࠺झ ೞח ߑध ௢ߡ֎౭झ ೐۽࠺੷׬ ో ࢶఖೞӝ ਍৔઺ ו՛ ೐۽࠺੷׬ ో(Kubespray)੄ ইए਍੼ ೐۽࠺੷׬ ో੄ ب਑ হ੉ ௢ߡ֎౭झ ࢲ࠺झ ೞӝ ੿ܻ ߂ ݃ޖܻ
3. ஠஠য়ীࢲ ௢ߡ֎౭झܳ ࢲ࠺झ ೞח ߑध ௢ߡ֎౭झ ೐۽࠺੷׬ ో ࢶఖೞӝ ਍৔઺ ו՛ ೐۽࠺੷׬ ో(Kubespray)੄ ইए਍੼ ೐۽࠺੷׬ ో੄ ب਑ হ੉ ௢ߡ֎౭झ ࢲ࠺झ ೞӝ ੿ܻ ߂ ݃ޖܻ
4. DKOSۆ ޖ঺ੋо? DKOS Datacenter of Kakao Operating System - Multi - Managed
5. DKOSۆ ޖ঺ੋо? CNI Log LB Volume DNS Ingress Managed pod Kubernetes cluster User DKOS
6. DKOSۆ ޖ঺ੋо? CNI Log LB Volume DNS Ingress Managed pod Kubernetes cluster User DKOS
7. DKOSۆ ޖ঺ੋо? CNI Log LB Volume DNS Ingress Managed pod Kubernetes cluster User DKOS
8. DKOSۆ ޖ঺ੋо? CNI Log LB Volume DNS Ingress Managed pod Kubernetes cluster User DKOS
9. DKOSীࢲ যڃ ੘সਸ ࣻ೯೧ঠ ೡө? 1. VM ࢤࢿ (OpenStack ӝ߈੄ ࢎղ IaaS ೐۽ં౟ੋ krane ࢎਊ) 2. kernel / OS ౵ۄ޷ఠ ࢸ੿ 3. ஶప੉ց ۠ఋ੐ ҳ୷ 4. ௢ߡ֎౭झ ҳ୷ 5. managed pod ߓನ
10. Provisioning tool ೐۽࠺੷׬ ో੄ ೙ਃࢿ
11. ஠஠য়ীࢲ ௢ߡ֎౭झܳ ࢲ࠺झ ೞח ߑध ௢ߡ֎౭झ ೐۽࠺੷׬ ో ࢶఖೞӝ ਍৔઺ ו՛ ೐۽࠺੷׬ ో(Kubespray)੄ ইए਍੼ ೐۽࠺੷׬ ో੄ ب਑ হ੉ ௢ߡ֎౭झ ࢲ࠺झ ೞӝ ੿ܻ ߂ ݃ޖܻ
12. Kubeadm “рױ” kubeadm੉ۆ ޖ঺ੋо?
13. kubeadm੉ۆ ޖ঺ੋо? DKOS Kubeadm ੢੼ উ੿ࢿ рױೣ ױ੼ ગ਷ ૑ਗ ߧਤ (য়૒ ௢ߡ֎౭झ ࢸ஖݅ ૑ਗ) ѐ߹ ੘স ࣻ೯ Node A - Z A - Z A - Z
14. Kubespray “և਷ ߧਤ੄ ੗زച + ׮নೠ ࢶఖ૑ ઁҕ” Kubesprayۆ ޖ঺ੋо?
15. Kubesprayۆ ޖ঺ੋо? Kubespray ੢੼ և਷ ߧਤ੄ ੗زച ૑ਗ ׮নೠ ࢶఖ૑ ઁҕ ױੌ ࣻ೯ਸ ాೠ ׮ࣻ ֢٘ ઁয оמ উ੿ࢿ DKOS Node access info + ansible script
16. Kubespray ଻ఖ!! Kubespray ଻ఖ
17. ݥ୾!! “Cluster APIח Ҋ۰ೞ૑ ঋওաਃ?” ׮ܲ ో਷ ࠺Ү উೞաਃ?
18. Kubespray ଻ఖ!! Kubespray ଻ఖ
19. Kubespray ଻ఖ Kubespray ଻ఖ
20. Kubespray ଻ఖ?? Kubespray ଻ఖ
21. ஠஠য়ীࢲ ௢ߡ֎౭झܳ ࢲ࠺झ ೞח ߑध ௢ߡ֎౭झ ೐۽࠺੷׬ ో ࢶఖೞӝ ਍৔઺ ו՛ ೐۽࠺੷׬ ో(Kubespray)੄ ইए਍੼ ೐۽࠺੷׬ ో੄ ب਑ হ੉ ௢ߡ֎౭झ ࢲ࠺झ ೞӝ ੿ܻ ߂ ݃ޖܻ
22. ࠁউ ੄ઓࢿ ࢸ஖ दр ਬ૑ ࠁࣻ Kubespray ইए਍੼
23. ࠁউ SSH Kubespray ইए਍੼ - ࠁউ
24. Kubespray ইए਍੼ - ੄ઓࢿ 20.04 20.04 20.04 18.04 18.04 18.04 16.04 16.04 16.04 Kubespray@v1.19 Ansible Python Pkg
25. Kubespray ইए਍੼ - ֢٘ ୶о दр ੘স ࢸݺ ࣻ೯ दр ࢎ੹ ੘স оמ ৈࠗ Download binary ‘container runtime, k8s, CNI . . .’ प೯ ౵ੌ ׮਍ 300s Image ղ੢ оמ Set container runtime & k8s container runtime & K8s ࢸ੿ ߂ ҳز 90s ੌࠗ ୊ܻ оמ Generate etc cert etcd cert ࢤࢿ 30s DKOS ୊ܻ оמ Gather facts anisible – inventory ֢٘ ੿ࠁ ࣻ૘ 20s X Set OS proxy, NSS, hostname . . . ࢸ੿ 10s Image ղ੢ оמ 450s – (Image ղ੢ + DKOS ୊ܻ) = 150s ୨ ࢸ஖ दр: 450s
26. ਬ૑ ࠁࣻ 300 ~ 400 Ansible TASK Kubespray ইए਍੼ - ਬ૑ ࠁࣻ
27. Ҋ޹੉ ݆ҳ݅… ࢶఖ੄ ӝ۽
28. ׮ܲ ో ૒੽ ѐߊ Cluster API A - Z ࢶఖ੄ ӝ۽
29. Cluster API “ࢿמ ੉गী ؀ೠ ੄ޙ” cluster-API Ѩష
30. Cluster API “ࢿמ ੉गী ؀ೠ ੄ޙ” cluster-API Ѩష
31. ೐۽࠺੷׬ ో ઁѢ Provisioning tool
32. ஠஠য়ীࢲ ௢ߡ֎౭झܳ ࢲ࠺झ ೞח ߑध ௢ߡ֎౭झ ೐۽࠺੷׬ ో ࢶఖೞӝ ਍৔઺ ו՛ ೐۽࠺੷׬ ో(Kubespray)੄ ইए਍੼ ೐۽࠺੷׬ ో੄ ب਑ হ੉ ௢ߡ֎౭झ ࢲ࠺झ ೞӝ ੿ܻ ߂ ݃ޖܻ
33. DKOSীࢲ যڃ ੘সਸ ࣻ೯೧ঠ ೡө? 1. VM ࢤࢿ (OpenStack ӝ߈੄ IaaS ೐۽ં౟ੋ krane ࢎਊ) 2. kernel / OS ౵ۄ޷ఠ ࢸ੿ 3. ஶప੉ց ۠ఋ੐ ҳ୷ 4. ௢ߡ֎౭झ ҳ୷ 5. managed pod ߓನ
34. DKOSীࢲ যڃ ੘সਸ ࣻ೯೧ঠ ೡө? 1. VM ࢤࢿ (OpenStack ӝ߈੄ IaaS ೐۽ં౟ੋ krane ࢎਊ) 2. kernel / OS ౵ۄ޷ఠ ࢸ੿ 3. ஶప੉ց ۠ఋ੐ ҳ୷ 4. ௢ߡ֎౭झ ҳ୷ 5. managed pod ߓನ Control plane 1 - 5 ױ҅ ૓೯ ֢٘ ୶о ੿੸ Data plane 1 - 4 ױ҅ ૓೯ ֢٘ ୶о ഝߊ ࢸ஖ दрী ޹х
35. DKOSীࢲ যڃ ੘সਸ ࣻ೯೧ঠ ೡө? 1. VM ࢤࢿ (OpenStack ӝ߈੄ IaaS ೐۽ં౟ੋ krane ࢎਊ) 2. kernel / OS ౵ۄ޷ఠ ࢸ੿ 3. ஶప੉ց ۠ఋ੐ ҳ୷ 4. ௢ߡ֎౭झ ҳ୷ 5. managed pod ߓನ Control plane 1 - 5 ױ҅ ૓೯ ֢٘ ୶о ੿੸ Data plane 1 - 4 ױ҅ ૓೯ ֢٘ ୶о ഝߊ ࢸ஖ दрী ޹х
36. DKOSীࢲ যڃ ੘সਸ ࣻ೯೧ঠ ೡө? 1. VM ࢤࢿ (OpenStack ӝ߈੄ IaaS ೐۽ં౟ੋ krane ࢎਊ) 2. kernel / OS ౵ۄ޷ఠ ࢸ੿ 3. ஶప੉ց ۠ఋ੐ ҳ୷ 4. ௢ߡ֎౭झ ҳ୷ 5. managed pod ߓನ
37. DKOSীࢲ যڃ ੘সਸ ࣻ೯೧ঠ ೡө? 1. VM ࢤࢿ (OpenStack ӝ߈੄ IaaS ೐۽ં౟ੋ krane ࢎਊ) 2. kernel / OS ౵ۄ޷ఠ ࢸ੿ 3. ஶప੉ց ۠ఋ੐ ҳ୷ 4. ௢ߡ֎౭झ ҳ୷ 5. managed pod ߓನ ੿੸ ؘ੉ఠ + ز੸ ؘ੉ఠ
38. DKOSীࢲ যڃ ੘সਸ ࣻ೯೧ঠ ೡө? 1. VM ࢤࢿ (OpenStack ӝ߈੄ IaaS ೐۽ં౟ੋ krane ࢎਊ) 2. kernel / OS ౵ۄ޷ఠ ࢸ੿ 3. ஶప੉ց ۠ఋ੐ ҳ୷ 4. ௢ߡ֎౭झ ҳ୷ 5. managed pod ߓನ ੿੸ ؘ੉ఠ (Image) + ز੸ ؘ੉ఠ (Cloud-init)
39. DKOS Image Repo Cloud-init Data center Krane ؘ੉ఠ ೒ۨੋ ೐۽࠺੷׬ - ৘द
40. DKOS Image Repo Cloud-init Data center Krane Pre-processing image ؘ੉ఠ ೒ۨੋ ೐۽࠺੷׬ - ৘द
41. DKOS Image Repo Cloud-init Data center Krane DataPlane Create VM With script ؘ੉ఠ ೒ۨੋ ೐۽࠺੷׬ - ৘द
42. DKOS Image Repo Cloud-init Data center Krane DataPlane Create VM With script Upload script ؘ੉ఠ ೒ۨੋ ೐۽࠺੷׬ - ৘द
43. DKOS Image Repo Cloud-init Data center Krane DataPlane Create VM With script Create VM ؘ੉ఠ ೒ۨੋ ೐۽࠺੷׬ - ৘द Pre-processing image
44. DKOS Image Repo Cloud-init Data center Krane 1. Request cloud-init script 2. Get Cert & Config from script DataPlane ؘ੉ఠ ೒ۨੋ ೐۽࠺੷׬ - ৘द
45. DKOS Image Repo Cloud-init Data center Krane Config Cert 1. Request cloud-init script 2. Get Cert & Config from script DataPlane ؘ੉ఠ ೒ۨੋ ೐۽࠺੷׬ - ৘द
46. DKOS Image Repo Cloud-init Data center Krane Config Cert ControlPlane Join DataPlane ؘ੉ఠ ೒ۨੋ ೐۽࠺੷׬ - ৘द
47. DKOS Image Repo Cloud-init Data center Krane Config Cert ControlPlane Join DataPlane ؘ੉ఠ ೒ۨੋ ೐۽࠺੷׬ - ৘द Done!!
48. DKOS Image Repo Cloud-init Data center Krane 2. Create VM With script 3. Create VM 3. Upload script Config Cert 6. Join ControlPlane 4. Request cloud-init script 5. Get Cert & Config from script 1. Pre-processing image DataPlane ؘ੉ఠ ೒ۨੋ ೐۽࠺੷׬ - ৘द
49. DKOS Image Repo Cloud-init Data center Krane 2. Create VM With script 3. Create VM 3. Upload script Config Cert 6. Join ControlPlane 4. Request cloud-init script 5. Get Cert & Config from script 1. Pre-processing image DataPlane ؘ੉ఠ ೒ۨੋ ೐۽࠺੷׬ - ৘द
50. যڌѱ? “ઑੋ җ੿” ؘ੉ఠ ೒ۨੋ੄ ஶ౟܀ ೒ۨੋ ઑੋ җ੿
51. DataPlane ControlPlane kube- apiserver kube- scheduler controller-manager etcd Kubelet Kube-Proxy ؘ੉ఠ ೒ۨੋ੄ ஶ౟܀ ೒ۨੋ ઑੋ җ੿ - ৘द
52. DataPlane ControlPlane Kubelet Kube-Proxy ؘ੉ఠ ೒ۨੋ੄ ஶ౟܀ ೒ۨੋ ઑੋ җ੿ - ৘द kube- apiserver kube- scheduler controller-manager etcd
53. DataPlane ControlPlane Kubelet Kube-Proxy ؘ੉ఠ ೒ۨੋ੄ ஶ౟܀ ೒ۨੋ ઑੋ җ੿ - ৘द Cert kube- apiserver kube- scheduler controller-manager etcd
54. DataPlane ControlPlane Kubelet Kube-Proxy ؘ੉ఠ ೒ۨੋ੄ ஶ౟܀ ೒ۨੋ ઑੋ җ੿ - ৘द kube- apiserver kube- scheduler controller-manager etcd
55. DataPlane ControlPlane Kubelet Kube-Proxy ؘ੉ఠ ೒ۨੋ੄ ஶ౟܀ ೒ۨੋ ઑੋ җ੿ - ৘द Token 1. Create Token kube- apiserver kube- scheduler controller-manager etcd
56. DataPlane ControlPlane Kubelet Kube-Proxy ؘ੉ఠ ೒ۨੋ੄ ஶ౟܀ ೒ۨੋ ઑੋ җ੿ - ৘द Token Token Config 1. Create Token 2. Create config kube- apiserver kube- scheduler controller-manager etcd
57. DataPlane ControlPlane Kubelet Kube-Proxy ؘ੉ఠ ೒ۨੋ੄ ஶ౟܀ ೒ۨੋ ઑੋ җ੿ - ৘द Token Token Config request cert kube- apiserver kube- scheduler controller-manager etcd
58. DataPlane ControlPlane Kubelet Kube-Proxy ؘ੉ఠ ೒ۨੋ੄ ஶ౟܀ ೒ۨੋ ઑੋ җ੿ - ৘द Token send cert Cert kube- apiserver kube- scheduler controller-manager etcd
59. DataPlane ControlPlane Kubelet Kube-Proxy ؘ੉ఠ ೒ۨੋ੄ ஶ౟܀ ೒ۨੋ ઑੋ җ੿ - ৘द Token Cert join kube- apiserver kube- scheduler controller-manager etcd
60. DKOS Image Repo Cloud-init Data center Krane 2. Create VM With script 3. Create VM 3. Upload script Config Cert 6. Join ControlPlane 4. Request cloud-init script 5. Get Cert & Config from script 1. Pre-processing image DataPlane ௿ۄ਋٘ ੉׫ী ੹׳غח ౵ੌ
61. DKOS Image Repo Cloud-init Data center Krane 2. Create VM With script 3. Create VM 3. Upload script Config Cert 6. Join ControlPlane 4. Request cloud-init script 5. Get Cert & Config from script 1. Pre-processing image Token Config DataPlane ௿ۄ਋٘ ੉׫ী ੹׳غח ౵ੌ
62. ஠஠য়ীࢲ ௢ߡ֎౭झܳ ࢲ࠺झ ೞח ߑध ௢ߡ֎౭झ ೐۽࠺੷׬ ో ࢶఖೞӝ ਍৔઺ ו՛ ೐۽࠺੷׬ ో(Kubespray)੄ ইए਍੼ ೐۽࠺੷׬ ో੄ ب਑ হ੉ ௢ߡ֎౭झ ࢲ࠺झ ೞӝ ੿ܻ ߂ ݃ޖܻ
63. ੿ܻ - ೐۽࠺੷׬ ో ࢶఖ ߓ҃ DKOS Datacenter of Kakao Operating System Provisioning tool +
64. ੿ܻ - Kubespray੄ ইए਍੼ SSH 450s 300 task dependency
65. ੿ܻ - ೐۽࠺੷׬ ో ઁѢ Provisioning tool
66. ੿ܻ - Kubespray੄ ইए਍੼ SSH 450s 300 task dependency
67. ੿ܻ - ೐۽࠺੷׬ ో হ੉ ௢ߡ֎౭झ ࢲ࠺झೠ Ѿҗ SSH 450s 300 task cloud-init 20s ੄ઓࢿ X ਬ૑ ࠁࣻ X dependency
68. नࣘ উ੹ ҃۝ ੿ܻ - ೐۽࠺੷׬ ో হ੉ ௢ߡ֎౭झ ࢲ࠺झೠ Ѿҗ
69. NEXT ControlPlane provisioning + managed pod deploy খਵ۽ ೧ঠೡ ੌ
70. E.O.D