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kubectl apply の仕組み / How kubectl apply works
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Takashi Kusumi
June 26, 2017
Technology
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9.9k
kubectl apply の仕組み / How kubectl apply works
Kubernetes Meetup Tokyo #5
2017.06.27
https://k8sjp.connpass.com/event/56945/
Takashi Kusumi
June 26, 2017
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Transcript
LVCFDUMBQQMZך➬穈 5BLBTIJ,VTVNJ ;-BC
LVCFDUMBQQMZהכ Ӝ ؔـآؙؑزָ㶷㖈׃זֽל⡲䧭 1045 ծ㶷㖈ׅל䊴ⴓ 1"5$) 僥׃גֻ⤑ⵃז؟ـ؝وٝس وصؿؑأزח״㹑鎉涸 EFDMBSBUJWF ז盖椚ָ〳腉
Ӝ ⽃秪ז♳剅ֹדכזֻծ䊴ⴓ僥דֿ֮הח岣䠐 LVCFDUMSFQMBDFכ⽃秪ז♳剅ֹ 165 Ӝ 䊴ⴓכLVCFDUM⩎ד鎘皾ׁ
➭ך؟ـ؝وٝسהך麩ְ ؟ـ؝وٝس ؔـآؙؑزָ㶷㖈׃זְ ؔـآؙؑزָ㶷㖈ׅ BQQMZ 倜鋉⡲䧭 1045 䊴ⴓ僥 1"5$)
˟ DSFBUF 倜鋉⡲䧭 1045 ⚠ؒٓ٦ SFQMBDF ⚠ؒٓ٦ ♳剅ֹ 165 QBUDI ⚠ؒٓ٦ 䊴ⴓ僥 1"5$) EFMFUF ⚠ؒٓ٦ ꤐ %&-&5& ˟QSVOF⢪㜥さ%&-&5&֮䖤
㹑鎉涸 EFDMBSBUJWF ؔـآؙؑز盖椚 Ӝ BQQMZח״وصؿؑأز纇 㹑鎉 ֽח״盖椚ָדֹ Ӝ ؔـآؙؑزך僥כLVCFDUMBQQMZGDPOHֽ Ӝ
QSVOF⢪ִלꤐ荈⹛ד遤ִ BMQIB堣腉 Ӝ 鑫稢כⰕ䒭سًُؗٝز撑 ,VCFSOFUFT0CKFDU.BOBHFNFOU ZBNM
BQQMZך䊴ⴓ僥
㉏겗ٖفٔؕ侧כוֲז apiVersion: extensions/v1beta1 kind: Deployment metadata: name: myapp1
spec: # レプリカ数を指定しない template: metadata: labels: run: myapp1 spec: containers: - image: nginx name: myapp1
㉏겗ٖفٔؕ侧כוֲז Ӝ ٖفٔؕ侧䭷㹀ׇ׆EFQMPZNFOUBQQMZׅ LVCFDUMBQQMZGNZBQQEFQZBNM Ӝ TDBMF؝وٝسדؔـآؙؑزךٖفٔؕ侧ח㢌刿 LVCFDUMTDBMFSFQMJDBTEFQMPZNZBQQ Ӝ ずׄوصؿؑأزⱄ䏝BQQMZׅ
LVCFDUMBQQMZGNZBQQEFQZBNM
瘶ִٖفٔؕ侧כךתתחז
㉏겗ٖفٔؕ侧כוֲז apiVersion: extensions/v1beta1 kind: Deployment metadata: name: myapp2
spec: replicas: 3 # レプリカ数を指定 template: metadata: labels: run: myapp2 spec: containers: - image: nginx name: myapp2
㉏겗ٖفٔؕ侧כוֲז Ӝ ٖفٔؕ侧ח䭷㹀׃EFQMPZNFOUBQQMZׅ LVCFDUMBQQMZGNZBQQEFQZBNM Ӝ TDBMF؝وٝسדؔـآؙؑزךٖفٔؕ侧ח㢌刿 LVCFDUMTDBMFSFQMJDBTEFQMPZNZBQQ Ӝ وصؿؑأزַٖفٔؕ侧ך鎸鶢չꤐպ׃גBQQMZׅ
LVCFDUMBQQMZGNZBQQEFQZBNM չEFQMPZNFOUTQFDSFQMJDBTպ荈⡤ך鎸鶢ꤐ
瘶ִٖفٔؕ侧כחז
䊴ⴓ鎘皾 ꤐⴓך鎘皾 ➙㔐ךوصؿؑأزה㔐BQQMZ׃وصؿؑأز嫰鯰׃ג ꤐׁؿ؍٦ٕس鎘皾ׅ 㔐ⴓכMBTUBQQMJFEDPOHVSBUJPOהְֲ،ظذ٦ءّٝח ⥂㶷ׁגְ 鷄⸇٥㢌刿ⴓך鎘皾
➙㔐ךوصؿؑأزה植㖈ךؔـآؙؑز嫰鯰׃ג鷄⸇٥㢌 刿ⴓ鎘皾ׅ
ػحثה׃ג鷏⥋ׁ { "metadata": { "annotations": { "kubectl.kubernetes.io/last-applied-configuration": "..." }
}, "spec": { "replicas": null } } curl -XPATCH -H "Content-Type: application/strategic-merge-patch+json" ... https://.../apis/extensions/v1beta1/namespaces/default/deployments/myapp https://github.com/kubernetes/community/blob/master/contributors/devel/strategic-merge-patch.md
ֿך➬穈ח״ًٔحز Ӝ وصؿؑأزח剅ַגְזְؿ؍٦ٕسכ⥂䭯ׁג刿倜 )PSJ[POUBM1PE"VUPTDBMFSך״ֲז➬穈ה湱䚍ָ葺ְ Ӝ وصؿؑأزַչꤐպ׃הְֲ䞔㜠僥ׇׁ Ӝ 鶢ך㉏겗כ剑ⴱַٖفٔؕ侧剅ַזֽלծLVCFDUM TDBMFד㢌刿׃⦼ךתת⥂䭯ׁ
תה Ӝ BQQMZכ♳剅ֹדכזֻ䊴ⴓ僥 Ӝ 䊴ⴓ鎘皾כչꤐⴓպהչ鷄⸇٥㢌刿ⴓպד嫰鯰㼎韋ָ殯ז 㔐ךوصؿؑأزָ،ظذ٦ءّٝה׃ג⥂㶷ׁגְ Ӝ 鑫׃ֻכ⟃♴ךⰕ䒭سًُؗٝز撑 %FDMBSBUJWF.BOBHFNFOUPG,VCFSOFUFT0CKFDUT6TJOH $POHVSBUJPO'JMFT
8FBSFIJSJOH CJUMZ[MBCDBSFFST