Ansibleで構成管理。〜たったひとつの冴えたやりかた〜

https://ljstudy.connpass.com/event/71037/
でのLT資料です。

Transcript

1. AnsibleͰߏ੒؅ཧɻ ʙͨͬͨͻͱͭͷࡓ͑ͨ΍Γ͔ͨʙ 2018.1.9 ৽ఆ൪ʂAnsible ͱZabbixͰ࣮ݱ͢Δ࣍ੈ୅ӡ༻؅ཧ ү෦ஐ඙
2. Who am I ? • ү෦ ஐ඙ (Tomohiko Isobe) • Infrastructure EngineerˏΫϦχΧϧɾϓϥοτϑΥʔϜג ࣜձࣾ(2017.10-) • ౡࠜݝग़਎ • Job Hopperʢݱࡏ8ࣾ໨…ʣ • Favorites: ࢙੻ɾઓ੻Ί͙ΓɺϑΝϛϨε https://clipla.jp
3. Ansible࢖ͬͯ·͢ΑͶ
4. ͜Μͳײ͡?
5. Infrastructure as Code !
7. ͦΕͬͯ ʮߏஙखॱʯͷ؅ཧͰ͸ʁ
8. αʔόͷʮߏ੒ʯΛ ؅ཧ͍ͨ͠
9. ʮߏ੒؅ཧʯͱݴ͑͹
10. ͔ͭͯɺ͜ͷੈʹ͸ ʮύϥϝʔλγʔτʯ ͳΔ΋ͷ͕͋ͬͨ
11. ͜Μͳͷ
12. ೔ʑͷӡ༻
13. ύϥϝʔλγʔτɺ
    ߋ৽͠ͱ͖·ͨ͠❤
14. ͋Δ೔ͷ͜ͱ
16. αʔόͷઃఆ͕ɺ ύϥϝʔλγʔτͱҧ͏…
17. ͪΌΜͱαʔόೖͬ ͯ֬ೝ͠·ͨ͠ʁ
18. Ͳ͏͢Δ͔
19. ΩϥοͱͻΒΊ͍ͨ
20. ࡓ͑ͨ΍Γ͔ͨ • Playbookͱม਺Λ෼͚Δ • hash_behaviour = merge • ม਺,FactҰཡΛग़ྗͯ͠؅ཧ
21. ࡓ͑ͨ΍Γ͔ͨ • Playbookͱม਺Λ෼͚Δ • hash_behaviour = merge • ม਺,FactҰཡΛग़ྗͯ͠؅ཧ
22. Playbookͱม਺Λ෼͚Δ
23. Playbookͱม਺Λ෼͚Δ • Roleʹม਺͸ॻ͔ͳ͍ʂ • ΠϯϕϯτϦϑΝΠϧʹ΋ॻ͔ͳ͍ʂ • ςϯϓϨʔτͷύϥϝʔλ΋Ͱ͖Δ͚ͩม਺ ʹʂ
24. Roleʹม਺͸ॻ͔ͳ͍ʂ • Role͸ࡉ͔͘෼ׂͨ͠ํ͕൚༻ੑ͕ߴ·Δ • ͍͍ͪͪશ෦ͷRoleͷmain.ymlݟͯΒΜͳ͍
25. Roleʹม਺͸ॻ͔ͳ͍ʂ • Role͸ࡉ͔͘෼ׂͨ͠ํ͕൚༻ੑ͕ߴ·Δ • ͍͍ͪͪશ෦ͷRoleͷmain.ymlݟͯΒΜͳ͍
26. Roleʹม਺͸ॻ͔ͳ͍ʂ • Role͸ࡉ͔͘෼ׂͨ͠ํ͕൚༻ੑ͕ߴ·Δ • ͍͍ͪͪશ෦ͷRoleͷmain.ymlݟͯΒΜͳ͍ →
27. Roleʹม਺͸ॻ͔ͳ͍ʂ • Role͸ࡉ͔͘෼ׂͨ͠ํ͕൚༻ੑ͕ߴ·Δ • ͍͍ͪͪશ෦ͷRoleͷmain.ymlݟͯΒΜͳ͍ → มߋָ͕
28. ΠϯϕϯτϦϑΝΠϧʹ΋ॻ͔ͳ͍ʂ • ֊૚తʹॻ͚ͳ͍ͷͰɺม਺΍άϧʔϓ͕૿͑ ΔͱಡΈͮΒ͍
29. ΠϯϕϯτϦϑΝΠϧʹ΋ॻ͔ͳ͍ʂ • ֊૚తʹॻ͚ͳ͍ͷͰɺม਺΍άϧʔϓ͕૿͑ ΔͱಡΈͮΒ͍
30. ΠϯϕϯτϦϑΝΠϧʹ΋ॻ͔ͳ͍ʂ • ֊૚తʹॻ͚ͳ͍ͷͰɺม਺΍άϧʔϓ͕૿͑ ΔͱಡΈͮΒ͍ ͭΒ͍ʜ
31. ςϯϓϨʔτͷύϥϝʔλ΋Ͱ͖Δ ͚ͩม਺ʹʂ • Roleͱ߹Θͤͯ൚༻ੑ͕޲্
32. ςϯϓϨʔτͷύϥϝʔλ΋Ͱ͖Δ ͚ͩม਺ʹʂ • Roleͱ߹Θͤͯ൚༻ੑ͕޲্ logrotateͷtemplate(ൈਮ)
33. ςϯϓϨʔτͷύϥϝʔλ΋Ͱ͖Δ ͚ͩม਺ʹʂ • Roleͱ߹Θͤͯ൚༻ੑ͕޲্ logrotateͷtemplate(ൈਮ) logrotateͷvars
34. Playbookͱม਺Λ෼͚Δ • Roleʹม਺͸ॻ͔ͳ͍ʂ • ΠϯϕϯτϦϑΝΠϧʹ΋ॻ͔ͳ͍ʂ • ςϯϓϨʔτͷύϥϝʔλ΋Ͱ͖Δ͚ͩม਺ ʹʂ
35. Playbookͱม਺Λ෼͚Δ • Roleʹม਺͸ॻ͔ͳ͍ʂ • ΠϯϕϯτϦϑΝΠϧʹ΋ॻ͔ͳ͍ʂ • ςϯϓϨʔτͷύϥϝʔλ΋Ͱ͖Δ͚ͩม਺ ʹʂ →ɹgroup_vars,host_varsʹॻ͘ʂ
36. ࡓ͑ͨ΍Γ͔ͨ • Playbookͱม਺Λ෼͚Δ • hash_behaviour = merge • ม਺,FactҰཡΛग़ྗͯ͠؅ཧ
37. hash_behaviour = merge
38. hash_behaviour = merge • ม਺ͷϚʔδϙϦγʔ • ansible.cfgͷ[defaults]Ͱઃఆ • σϑΥϧτ͸”replace”
39. hash_behaviour = merge • σϑΥϧτ(replace)ͷڍಈ + group_vars ༏ઌ౓ɿ௿ host_vars ༏ઌ౓ɿߴ
40. hash_behaviour = merge • σϑΥϧτ(replace)ͷڍಈ + group_vars ༏ઌ౓ɿ௿ host_vars ༏ઌ౓ɿߴ → key2͕ফ͑ͨ
41. hash_behaviour = merge • hash_behaviour=mergeͷڍಈ + group_vars ༏ઌ౓ɿ௿ host_vars ༏ઌ౓ɿߴ
42. hash_behaviour = merge • hash_behaviour=mergeͷڍಈ + → group_vars ༏ઌ౓ɿ௿ host_vars ༏ઌ౓ɿߴ key1͸্ॻ͖ key3͕௥Ճ
43. hash_behaviour = merge • γʔέϯε(Ϧετ)͸ཁૉ͕શ෦্ॻ͖͞Εͯ ͠·͏ͷͰ஫ҙ + group_vars ༏ઌ౓ɿ௿ host_vars ༏ઌ౓ɿߴ
44. hash_behaviour = merge • γʔέϯε(Ϧετ)͸ཁૉ͕શ෦্ॻ͖͞Εͯ ͠·͏ͷͰ஫ҙ + → group_vars ༏ઌ౓ɿ௿ host_vars ༏ઌ౓ɿߴ list͝ͱ্ॻ͖
45. hash_behaviour = merge • ม਺ͷޮ཰తͳ؅ཧ͕Մೳ
46. hash_behaviour = merge • ม਺ͷޮ཰తͳ؅ཧ͕Մೳ group_vars/all.yml(શαʔόڞ௨)
47. hash_behaviour = merge • ม਺ͷޮ཰తͳ؅ཧ͕Մೳ group_vars/all.yml(શαʔόڞ௨) group_vars/webservers.yml(webαʔόڞ௨) +
48. hash_behaviour = merge • ม਺ͷޮ཰తͳ؅ཧ͕Մೳ group_vars/all.yml(શαʔόڞ௨) group_vars/webservers.yml(webαʔόڞ௨) host_vars/web01.yml(web01ݻ༗ઃఆ) + +
49. hash_behaviour = merge • ม਺ͷޮ཰తͳ؅ཧ͕Մೳ group_vars/all.yml(શαʔόڞ௨) group_vars/webservers.yml(webαʔόڞ௨) host_vars/web01.yml(web01ݻ༗ઃఆ) ࠷ऴతʹweb01ʹద༻͞ΕΔม਺ → + +
50. hash_behaviour = merge • ΍Γ͗͢஫ҙ • ༧ظͤ͵্ॻ͖ • ෳ਺group_varsͷద༻ॱ • ม਺͕෼ࢄ͞Εͯ͠·͏
51. ࡓ͑ͨ΍Γ͔ͨ • Playbookͱม਺Λ෼͚Δ • hash_behaviour = merge • ม਺,FactҰཡΛग़ྗͯ͠؅ཧ
52. ม਺,FactҰཡΛग़ྗͯ͠؅ཧ
53. ม਺,FactҰཡΛग़ྗͯ͠؅ཧ • merge͞Εͨม਺Λग़ྗ • Fact ?
54. merge͞Εͨม਺Λग़ྗ • templateϞδϡʔϧͰɺlocalhostʹશม਺Λग़ ྗ͢Δ • શม਺Λ”my_vars(೚ҙ)”ҎԼͷ֊૚ߏ଄ʹ͢ Δʢॏཁʂʣ • {{ hostvars[inventory_hostname]["my_vars"] | to_nice_yaml | indent(2, True) }}
55. merge͞Εͨม਺Λग़ྗ • Playbook ESZSVOͰ΋ग़ྗ
56. merge͞Εͨม਺Λग़ྗ • template
57. merge͞Εͨม਺Λग़ྗ • ͜Μͳײ͡
58. Fact ? • SetupϞδϡʔϧʹΑΓऩू͞ΕΔର৅ϗετ ͷ؀ڥ৘ใ • ansible_*ͱͯ͠ࢀরՄೳ
59. ͔ͤͬ͘ͳΜͰFact΋ग़ྗ͠·͔͢ • ྫ͑͹ɺΧʔωϧͷόʔδϣϯͳΒ {{ hostvars[inventory_hostname] [ansible_kernel] }} • ͍ͬͺ͍͋ΔͷͰ؅ཧ͍ͨ͠৘ใΛ͓޷ΈͰ
60. ͔ͤͬ͘ͳΜͰFact΋ग़ྗ͠·͔͢ • ͜Μͳײ͡
61. ࠓͷαʔόͷߏ੒ɺ
    ͜͏ͳͬͯ·͢❤
62. ύϥϝʔλγʔτײʂ
63. ͜ΕΛgitͰ؅ཧ͢Ε͹
64. ߏ੒؅ཧʂ
65. ·ͱΊ
66. ࡓ͑ͨ΍Γ͔ͨ • Playbookͱม਺Λ෼͚Δ • hash_behaviour = merge • ม਺,FactҰཡΛग़ྗͯ͠؅ཧ
67. ࡓ͑ͨ΍Γ͔ͨ • Playbookͱม਺Λ෼͚Δ • hash_behaviour = merge • ม਺,FactҰཡΛग़ྗͯ͠؅ཧ →ߏஙखॱͱύϥϝʔλΛ෼ׂ
68. ࡓ͑ͨ΍Γ͔ͨ • Playbookͱม਺Λ෼͚Δ • hash_behaviour = merge • ม਺,FactҰཡΛग़ྗͯ͠؅ཧ →ߏஙखॱͱύϥϝʔλΛ෼ׂ →ύϥϝʔλΛޮ཰తʹ؅ཧ
69. ࡓ͑ͨ΍Γ͔ͨ • Playbookͱม਺Λ෼͚Δ • hash_behaviour = merge • ม਺,FactҰཡΛग़ྗͯ͠؅ཧ ≒ ύϥϝʔλγʔτ →ߏஙखॱͱύϥϝʔλΛ෼ׂ →ύϥϝʔλΛޮ཰తʹ؅ཧ
70. ࡓ͑ͨ΍Γ͔ͨ • Playbookͱม਺Λ෼͚Δ • hash_behaviour = merge • ม਺,FactҰཡΛग़ྗͯ͠؅ཧ ≒ ύϥϝʔλγʔτˠgit؅ཧ →ߏஙखॱͱύϥϝʔλΛ෼ׂ →ύϥϝʔλΛޮ཰తʹ؅ཧ
71. એ఻ • ଞʹ΋Ansibleωλॻ͍ͯ·͢ • https://qiita.com/isobecky74
72. Thank you !