ãKubernetes ãš OpenShift ã®éãã¯äœã§ãã?ã â ãã®è³ªåã¯ãããããŸããã»ã©ã®äžè²«æ§ãæã£ãŠçããŸãã ãããå®éã«ã¯ãããã¯è»ãšãšã³ãžã³ãã©ãéãã®ããåããããªãã®ã§ãã ããšããç¶ãããšãè»ã¯å®æåã§ãããæåéãããã«äœ¿çšã§ããŸããä¹ã£ãŠããã«äœ¿ããŸãã äžæ¹ã§ããšã³ãžã³ãããªããã©ããã«é£ããŠè¡ã£ãŠãããã«ã¯ãæçµçã«åãè»ãåŸãããã«ããŸãä»ã®å€ãã®ãã®ãè£ããªããã°ãªããŸããã
ãããã£ãŠãKubernetes ã¯ãOpenShift ãã©ã³ãã®è» (ãã©ãããã©ãŒã ) ãçµã¿ç«ãŠããšã³ãžã³ã§ããããŠãŒã¶ãŒãç®æšã«å°ããŸãã
ãã®èšäºã§ã¯ã次ã®éèŠãªç¹ãæãåºããŠããã ããããå°ã詳ããæ€èšããŠãããããšæããŸãã
- Kubernetes 㯠OpenShift ãã©ãããã©ãŒã ã®äžå¿ã§ããã100% èªå®ããã Kubernetes ã§ãããå®å
šã«ãªãŒãã³ãœãŒã¹ã§ãããç¬å çãªæ§è³ªã¯ãŸã£ãããããŸããã ç°¡åã«èšããš:
- OpenShift ã¯ã©ã¹ã¿ãŒ API 㯠XNUMX% Kubernetes ã§ãã
- ã³ã³ãããŒãä»ã® Kubernetes ã·ã¹ãã äžã§å®è¡ãããå Žåãã³ã³ãããŒã¯äœãå€æŽããã« OpenShift äžã§å®è¡ãããŸãã ã¢ããªã±ãŒã·ã§ã³ãå€æŽããå¿ èŠã¯ãããŸããã
- OpenShift ã¯ã䟿å©ãªæ©èœã Kubernetes ã«è¿œå ããã ãã§ã¯ãããŸããã è»ãšåãããã«ãOpenShift ã¯ç®±ããåºããŠããã«å®çšŒåç°å¢ã«å°å ¥ã§ãã以äžã«ç€ºãããã«ãéçºè ã®äœæ¥ãå€§å¹ ã«æ¥œã«ããŸãã OpenShift ã XNUMX 人ã®ã¡ã³ããŒã§å£çµããŠããã®ã¯ãã®ããã§ãã ããã¯ãéçºè ã®èŠ³ç¹ããã¯æåããŠãããããç¥ãããŠãããšã³ã¿ãŒãã©ã€ãº ã¯ã©ã¹ã® PaaS ãã©ãããã©ãŒã ã§ããããŸãã åæã«ãããã¯ç£æ¥éçšã®èŠ³ç¹ããéåžžã«ä¿¡é Œæ§ã®é«ã Container-as-a-Service ãœãªã¥ãŒã·ã§ã³ã§ãã
OpenShift 㯠100% CNCF èªå®ãåãã Kubernetes ã§ã
OpenShift ã¯ä»¥äžã«åºã¥ããŠããŸã
ãããããOC ãšåŒã°ãã OpenShift ã®ã³ãã³ãã©ã€ã³ ãŠãŒãã£ãªãã£ã«ã€ããŠèããããšãããã§ãããã ããã¯ãkubectl ãšå®å šãªã³ãã³ãäºææ§ããããããã«ãå€ãã®ã¿ã¹ã¯ãå®è¡ãããšãã«åœ¹ç«ã€ããã€ãã®äŸ¿å©ãªãã«ããŒãæäŸããŸãã ãã®åã«ãOC ãš kubectl ã®äºææ§ã«ã€ããŠããå°ã詳ãã説æããŸãã
kubectlã³ãã³ã
OCããŒã
kubectl get pod
oc ããããååŸããŸã
kubectl ã§åå空éãååŸãã
oc åå空éãååŸãã
kubectl create -f ãããã€ã¡ã³ã.yaml
oc create -f ãããã€ã¡ã³ã.yaml
OpenShift API 㧠kubectl ã䜿çšããçµæã¯æ¬¡ã®ããã«ãªããŸãã
⢠kubectl get pods â æåŸ ã©ããã«ããããè¿ããŸãã
⢠kubectl get namespaces â æåŸ ã©ããã«åå空éãè¿ããŸãã
ã³ãã³ã kubectl create -f mydeployment.yaml ã¯ã以äžã®ãããªã«ç€ºãããã«ãä»ã® Kubernetes ãã©ãããã©ãŒã ãšåæ§ã« kubernetes ãªãœãŒã¹ãäœæããŸãã
èšãæããã°ããã¹ãŠã® Kubernetes API 㯠100% ã®äºææ§ãç¶æããªãã OpenShift ã§å®å šã«å©çšå¯èœã§ãã ãããçç±ã§ã
OpenShift 㯠Kubernetes ã«äŸ¿å©ãªæ©èœãè¿œå ããŸã
Kubernetes API 㯠OpenShift 㧠100% å©çšã§ããŸãããæšæºã® Kubernetes ãŠãŒãã£ãªã㣠kubectl ã«ã¯æããã«æ©èœãšå©äŸ¿æ§ãæ¬ ããŠããŸãã ãã®ãããRed Hat ã¯ãOC (OpenShift ã¯ã©ã€ã¢ã³ãã®ç¥) ã ODO (OpenShift DOããã®ãŠãŒãã£ãªãã£ã¯éçºè åã) ãªã©ã®äŸ¿å©ãªæ©èœãã³ãã³ãã©ã€ã³ ããŒã«ã Kubernetes ã«è¿œå ããŸããã
1. OC ãŠãŒãã£ãªã㣠- Kubectl ã®ãã匷åã§äŸ¿å©ãªããŒãžã§ã³
ããšãã°ãkubectl ãšã¯ç°ãªããæ°ããåå空éãäœæããŠã³ã³ããã¹ããç°¡åã«åãæ¿ããããšãã§ããã³ã³ãã ã€ã¡ãŒãžã®æ§ç¯ããœãŒã¹ ã³ãŒããŸãã¯ãã€ããªããã®ã¢ããªã±ãŒã·ã§ã³ã®çŽæ¥ãããã€ãªã©ãéçºè ã«ãšã£ãŠäŸ¿å©ãªã³ãã³ããå€æ°æäŸãããŸã (ãœãŒã¹ããã€ã¡ãŒãžã s2i)ã
OC ãŠãŒãã£ãªãã£ã®çµã¿èŸŒã¿ãã«ããŒãšé«åºŠãªæ©èœãæ¥åžžæ¥åã®ç°¡çŽ åã«ã©ã®ããã«åœ¹ç«ã€ãã®äŸãèŠãŠã¿ãŸãããã
æåã®äŸã¯åå空éã®ç®¡çã§ãã å Kubernetes ã¯ã©ã¹ã¿ãŒã«ã¯åžžã«è€æ°ã®åå空éããããŸãã ãããã¯éåžžãéçºããã³éçšç°å¢ãäœæããããã«äœ¿çšãããŸãããããšãã°ãåéçºè ã«å人çšã®ãµã³ãããã¯ã¹ãæäŸããããã«äœ¿çšããããšãã§ããŸãã å®éã«ã¯ãkubectl ã¯çŸåšã®ç©ºéã®ã³ã³ããã¹ãã§å®è¡ããããããéçºè ã¯åå空éãé »ç¹ã«åãæ¿ããå¿ èŠããããŸãã ãããã£ãŠãkubectl ã®å Žåã人ã ã¯ãã®ããã«ãã«ã㌠ã¹ã¯ãªãããç©æ¥µçã«äœ¿çšããŸãã ãã ããOC ã䜿çšããå Žåãç®çã®ã¹ããŒã¹ã«åãæ¿ããã«ã¯ããoc ãããžã§ã¯ãåå空éããšèšãã ãã§ãã
å¿ èŠãªåå空éã®ååãèŠããŠããªãå Žåã¯ã åé¡ãããŸããããoc get projectããšå ¥åããã ãã§å®å šãªãªã¹ãã衚瀺ãããŸãã ã¯ã©ã¹ã¿ãŒäžã®éãããåå空éã®ãµãã»ããã«ããã¢ã¯ã»ã¹ã§ããªãå Žåããããã©ã®ããã«æ©èœããã®ãçåã«æããŸããã? çç±ã¯ãkubectl ããããæ£ããå®è¡ã§ããã®ã¯ãRBAC ã«ãã£ãŠã¯ã©ã¹ã¿ãŒäžã®ãã¹ãŠã®ã¹ããŒã¹ã®è¡šç€ºãèš±å¯ãããŠããå Žåã ãã§ããã倧èŠæš¡ãªã¯ã©ã¹ã¿ãŒã§ã¯å šå¡ã«ãã®ãããªã¢ã¯ã»ã¹èš±å¯ãäžããããããã§ã¯ãªãããã§ãã ãããã£ãŠãç§ãã¡ã¯ããçããŸããOC ã«ãšã£ãŠãããã¯ãŸã£ããåé¡ã§ã¯ãªãããã®ãããªç¶æ³ã§ãå®å šãªãªã¹ããç°¡åã«äœæã§ããŸãã ãããã®å°ããªããšããOpenshift ã®äŒæ¥æ¹åæ§ãšããŠãŒã¶ãŒãšã¢ããªã±ãŒã·ã§ã³ã®èŠ³ç¹ããã®ãã®ãã©ãããã©ãŒã ã®åªããã¹ã±ãŒã©ããªãã£ãæ§æããŠããŸãã
2. ODO - éçºè åãã® kubectl ã®æ¹è¯ç
Kubernetes ã«å¯Ÿãã Red Hat OpenShift ã®æ¹åç¹ã®ãã XNUMX ã€ã®äŸã¯ãODO ã³ãã³ã ã©ã€ã³ ãŠãŒãã£ãªãã£ã§ãã éçºè åãã«èšèšãããŠãããããŒã«ã« ã³ãŒãããªã¢ãŒã OpenShift ã¯ã©ã¹ã¿ãŒã«è¿ éã«ãããã€ã§ããŸãã ãŸããå éšããã»ã¹ãåçåããã€ã¡ãŒãžã®åæ§ç¯ãã¬ãžã¹ããªãåãããã€ãå¿ èŠãšããã«ããã¹ãŠã®ã³ãŒãå€æŽããªã¢ãŒã OpenShift ã¯ã©ã¹ã¿ãŒäžã®ã³ã³ãããŒã«å³åº§ã«åæã§ããŸãã
OC ãš ODO ã«ãã£ãŠã³ã³ãããŒãš Kubernetes ã®æäœãã©ã®ããã«ç°¡åã«ãªãããèŠãŠã¿ãŸãããã
kubectl ã«åºã¥ããŠæ§ç¯ãããå ŽåãšãOC ãŸã㯠ODO ã䜿çšãããå Žåã®ããã€ãã®ã¯ãŒã¯ãããŒãæ¯èŒããŠãã ããã
⢠YAML ãç解ã§ããªã人ã®ããã® OpenShift ãžã®ã³ãŒãã®ãããã€ã¡ã³ã:
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OpenShift/oc
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OpenShift/odo
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Kubernetes/kubectl
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2- kubectl ã»ããã³ã³ããã¹ãâŠ
OpenShift/oc
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äœæ ã§ããïŒ ä»ã®ãœãããŠã§ã¢ã®éçºãšåæ§ãKubernetes ã®æåã®ã¢ã€ãã¢ã®ãã¹ãŠãæçµãªãªãŒã¹ã«å°éããããã§ã¯ãªãããã§ãã ãããã¯ãç®æšã«å°éããæå³ããæ©èœãä¿æããããšãããããŸããããã®å®è£ ã¯ã¢ã«ãã¡çãšã¯æ ¹æ¬çã«ç°ãªããŸãã äœåãã® Red Hat 顧客ã OpenShift ã䜿çšããŠããã·ã§ã³ã¯ãªãã£ã«ã«ãªã¯ãŒã¯ããŒãããµããŒãããŠãããããç§ãã¡ã¯ãã©ãããã©ãŒã ã®å®å®æ§ãšé·æãµããŒãã«ç¹ã«éç¹ã眮ããŠããŸãã
Red Hat ã¯ãOpenShift ãé »ç¹ã«ãªãªãŒã¹ããããã«å«ãŸãã Kubernetes ã®ããŒãžã§ã³ãæŽæ°ããããšã«åãçµãã§ããŸãã ããšãã°ããã®èšäºã®å·çæç¹ã§ã® OpenShift 4.3 ã®çŸåšã® GA ãªãªãŒã¹ã«ã¯ Kubernetes 1.16 ãå«ãŸããŠããŸããããã㯠Kubernetes ã®ã¢ããã¹ããªãŒã ããŒãžã§ã³ 1.17 ãã XNUMX ã€ã ãé ããŠããŸãã ãããã£ãŠãç§ãã¡ã¯é¡§å®¢ã«ãšã³ã¿ãŒãã©ã€ãºã¯ã©ã¹ã® Kubernetes ãæäŸããOpenShift ã®æ°ããããŒãžã§ã³ããªãªãŒã¹ãããšãã«è¿œå ã®å質管çãæäŸããããšããŠããŸãã
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1. ããŒã¹ãšãªãå ç¢ãª OS: RHEL CoreOS ãŸã㯠RHEL
Red Hat ã¯ã20 幎以äžã«ããããããžãã¹ ã¯ãªãã£ã«ã«ãªã¢ããªã±ãŒã·ã§ã³åãã® Linux ãã£ã¹ããªãã¥ãŒã·ã§ã³ã®å€§æãããã€ããŒã§ãã ãã®åéã§èç©ãããåžžã«æŽæ°ãããŠããçµéšã«ãããã³ã³ããã®ç£æ¥éçšã«çã«ä¿¡é Œã§ããåºç€ãæäŸããããšãã§ããŸãã RHEL CoreOS 㯠RHEL ãšåãã«ãŒãã«ã䜿çšããŸãããäž»ã«ã³ã³ããã®å®è¡ã Kubernetes ã¯ã©ã¹ã¿ãŒã®å®è¡ãªã©ã®ã¿ã¹ã¯çšã«æé©åãããŠããŸãããµã€ãºãå°ãããªãäžå€ã§ãããããã¯ã©ã¹ã¿ãŒã®ã»ããã¢ãããèªåã¹ã±ãŒãªã³ã°ããããã®ãããã€ãªã©ãç°¡åã«ãªããŸãããããã®æ©èœãã¹ãŠã«ããããã¢ã¡ã¿ã«ãããã©ã€ããŒãããã³ãããªãã¯ã¯ã©ãŠããŸã§ãå¹ åºãã³ã³ãã¥ãŒãã£ã³ã°ç°å¢ã«ããã£ãŠ OpenShift ã䜿çšããŠåããŠãŒã¶ãŒãšã¯ã¹ããªãšã³ã¹ãæäŸããããã®çæ³çãªåºç€ã§ãã
2. ITéçšã®èªåå
ã€ã³ã¹ããŒã« ããã»ã¹ãš 4 æ¥ç®ã®æäœ (ã€ãŸããæ¥åžžçãªæäœ) ã®èªåå㯠OpenShift ã®åŒ·ã¿ã§ãããã³ã³ãã ãã©ãããã©ãŒã ã®ç®¡çãæŽæ°ãããã©ãŒãã³ã¹ãæé«ã¬ãã«ã§ç¶æããããšãã¯ããã«ç°¡åã«ãªããŸãã ããã¯ãOpenShift XNUMX ã«ãŒãã« ã¬ãã«ã§ã® Kubernetes ãªãã¬ãŒã¿ãŒã®ãµããŒãã«ãã£ãŠå®çŸãããŸãã
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