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kubesprayで作って壊そうk8sクラスタ
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Kentaro Sasaki
October 12, 2022
Programming
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64
kubesprayで作って壊そうk8sクラスタ
2022/10/12 K8s@home #1のLT資料です。
Kentaro Sasaki
October 12, 2022
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Transcript
kubesprayͰ ࡞ͬͯյͦ͏k8sΫϥελ 2022/10/12 K8s@home #1 ࠤʑ ݈ଠ࿕ɹɹ@ponzmild 1
ࣗݾհ ࠤʑ ݈ଠ࿕ (Kentaro Sasaki) - ɹ@ponzmild • ॴଐ: ຊΞΠɾϏʔɾΤϜגࣜձࣾ
• ීஈͷ͓ࣄ: OpenShiftͰΞϓϦ։ൃ & ϞμφΠθʔγϣϯࢧԉ • ॻ੶ࣥච: ʰApache KafkaΛ͡ΊΔʱ(ΠϯϓϨεR&Dࣾ) • ࣗk8sྺ: 1 2
ͦͷKubernetesΫϥελɺ ʮࠓʯ͏Ұ࡞Γͤ·͔͢ʁ 3
͘ӡ༻͍ͯ͠Δͱ࡞Γ͕࣌͘͢Δ ཧϚγϯ ϋΠύʔόΠβʔ ཧϚγϯ ཧϚγϯ 7. 7. 7. 7. 7.
,VCFSOFUFT 1PE 1PE 1PE Ϧιʔε૿ڧɺNWઃఆͷมߋɺ ిݯஅͰμϯ ఆظతͳόʔδϣϯΞοϓ Pod͔Βར༻͢Δύοέʔδಋೖɺ ಉډ͢ΔVMͷͨΊʹϦιʔεۭ͚Θͨ͠ K8sΫϥελͷόʔδϣϯΞοϓɺ ίϯϙʔωϯτͷ߹࣮ͤมߋ 4
·ͱΊͯ࡞Γ͢ͷେมʂʂ ઃఆΛΕͨ ͳͥ͜ΜͳઃఆΛ ೖΕͨͷ͔ෆ໌ ख࡞ۀͩͱԿ Γ͠ ࡞Γ͍ͨ͠ͷ Ұ෦͚ͩͳͷʹ 5
kubesprayͰ ΧδϡΞϧʹk8s࡞ͬͯյͦ͏ʂ 6
kubesprayͱ • K8sΫϥελΛߏཧɺ͓Αͼ࡞~আΛ࣮ߦ͢ΔπʔϧΩοτ • https://github.com/kubernetes-sigs/kubespray • ϕΞϝλϧɺvSphereɺAWSɺAzureͱ͍ͬͨෳڥʹରԠ • HAߏͷΫϥελߏՄೳ •
࣮ଶAnsible Playbookͷू߹ = k8sΫϥελΛIaCԽ 7
https://kubernetes.io/ja/docs/setup/production-environment/tools/kubespray/ 8
kubesprayͷΈ ཧϚγϯ ϋΠύʔόΠβʔ ཧϚγϯ ཧϚγϯ 7. 7. 7. 7. 7.
,VCFSOFUFT kubespray Ansible Ansible Playbook (YAML) K8sʹඞཁͳOSઃఆ Addons 1PE 1PE 1PE 9
kubesprayΛ͡ΊΔ 10
kubesprayͷલఏ • kubespray࣮ߦϚγϯʹPythonΛΠϯετʔϧࡁͰ͋Δ͜ͱ • ansible-coreͷόʔδϣϯʹ߹ΘͤͯɺPython 3.8Ҏ্Λਪ • K8s NodeLinuxͰ͋Δ͜ͱ •
Debian, Ubuntu, RHEL/Fedora, Oracle Linux • Windows Node͚ͷPlaybook͋Δ͕ެࣜʹαϙʔτ͞Ε͍ͯͳ͍ 11
Step1: kubesprayͷηοτΞοϓ (JUϦϙδτϦλά໊ ͰΫϩʔϯΛਪ 12
Step2: ΠϯϕϯτϦͱઃఆϑΝΠϧΛੜ "OTJCMFΛΒͳ͘ ͯΠϯϕϯτϦͱઃఆ :".-ΛੜՄೳ 13
Step3: ઃఆϑΝΠϧΛฤू Inventory/mycluster/group_vars/ k8s_cluster/k8s-cluster.yml Inventory/mycluster/group_vars/ k8s_cluster/addons.yml HSPVQ@WBSTҎԼͷ ඞཁͳύϥϝʔλ͚ͩฤू ͢Ε0, 14
Step4a: kubesprayͰΫϥελΛཱͯΔ • ࣄલఆٛ͞ΕͨPlaybook “cluster.yml” Ͱk8sΫϥελΛཱͯΔ NBTUFS XPSLFS Ͱd 15
Step4b: ඞཁͳ࣌ʹ͙͢յͤΔ • ࣄલఆٛ͞ΕͨPlaybook “reset.yml” ͰΧδϡΞϧʹյͤΔ 16
kubesprayͰخ͍͠ϙΠϯτ 👍 • K8sΫϥελͷίϯϙʔωϯτબఆɾઃఆPlaybookΛݟΕશͯΘ͔Δ • Gitཧ͢Εɺͳͥͦͷઃఆʹ͔ͨ͠ (=Why) ݟ͕ίϛοτϩάʹΔ • Կճ࣮ߦͯ݁͠Ռ͕ಉ͡ʹͳΔ
= “ႈ” • ҆৺ͯ͠k8sΫϥελΛ࡞Γ͠Մೳ (※ͨͩ͠VMΑΓ্ͷϨΠϠʔʹݶΔ) • PlaybookͷҰ෦͚ͩྲྀ͢͜ͱՄೳ • طଘͷPlaybook͔ΒKubesprayͷPlaybookΛݺͼग़͢͜ͱՄೳͰ͢ 17
ͦͷKubernetesΫϥελɺ ʮࠓʯ͏Ұ࡞Γͤ·͔͢ʁ → kubesprayͰ࡞ͬͯյͦ͏ʂ 18
Happy k8s@home!😉 19
(ࢀߟ) kubesprayͷAddons • Load Balancer … MetalLB • Ingress …
NGINX Ingress Controller • Storage … CephFS, RBD, Rancher Local Path Provisioner • Observability … Metrics Server • GitOps … ArgoCD • Security … Cert Manager 20 ※ AddonsͷҰཡv2.20.0࣌ LTΫϥελͱಉ͡ϥ ΠϑαΠΫϧͰಋೖ͢Δ 1BB4ίϯϙʔωϯτ