{"id":4367,"date":"2024-04-15T12:01:12","date_gmt":"2024-04-15T12:01:12","guid":{"rendered":"https:\/\/bulutistan.com\/blog\/?p=4367"},"modified":"2024-04-15T12:01:12","modified_gmt":"2024-04-15T12:01:12","slug":"kubernetes-guvenligi-icin-bilmeniz-gereken-en-iyi-uygulamalar","status":"publish","type":"post","link":"https:\/\/bulutistan.com\/blog\/kubernetes-guvenligi-icin-bilmeniz-gereken-en-iyi-uygulamalar\/","title":{"rendered":"Kubernetes G\u00fcvenli\u011fi \u0130\u00e7in Bilmeniz Gereken En \u0130yi Uygulamalar"},"content":{"rendered":"<p><a href=\"https:\/\/bulutistan.com\/blog\/kubernetes-nedir\/\">Kubernetes<\/a>\u00a0ortamlar\u0131n\u0131n dinamik yap\u0131s\u0131, \u00f6zel savunma stratejileri ve ara\u00e7lar\u0131 gerektiren benzersiz g\u00fcvenlik risklerini de beraberinde getirir. Bu y\u00fczden daha fazla i\u015fletme g\u00f6rev a\u00e7\u0131s\u0131ndan kritik da\u011f\u0131t\u0131mlar i\u00e7in Kubernetes&#8217;i benimsedik\u00e7e, i\u00e7inde \u00e7al\u0131\u015fan altyap\u0131y\u0131 ve i\u015f y\u00fcklerini uygun \u015fekilde korumak da \u00e7ok \u00f6nemli hale gelmektedir.<\/p>\n<p>Kubernetes g\u00fcvenli\u011fi tam olarak nedir?<\/p>\n<h1 id=\"kubernetes-guvenligi-nedir\"><strong>Kubernetes G\u00fcvenli\u011fi Nedir?<\/strong><\/h1>\n<p>Kubernetes g\u00fcvenli\u011fi, altyap\u0131y\u0131 g\u00fcvence alt\u0131na almaktan konteynerlerde \u00e7al\u0131\u015fan uygulamalara kadar bir K8s ortam\u0131n\u0131 korumak i\u00e7in al\u0131nan uygulamalar\u0131 ve \u00f6nlemleri ifade eder.<\/p>\n<p>Dinamik ve karma\u015f\u0131k yap\u0131s\u0131 nedeni ile Kubernetes&#8217;in g\u00fcvenli\u011fini sa\u011flamak olduk\u00e7a zor olsa da, Kubernetes BT altyap\u0131s\u0131 i\u00e7in ana ak\u0131m bir se\u00e7enek haline geldik\u00e7e, bilgisayar korsanlar\u0131 i\u00e7in de cazip bir hedef haline gelmektedir.<\/p>\n<p>Bu noktada Kubernetes g\u00fcvenlik \u00f6nlemlerini do\u011fru bir \u015fekilde uygulayarak hassas verileri koruyabilir, sistem kararl\u0131l\u0131\u011f\u0131n\u0131 s\u00fcrd\u00fcrebilir ve yetkisiz eri\u015fimi \u00f6nleyebilirsiniz.<\/p>\n<p>Kubernetes&#8217;in benimsenmesi ve g\u00fcvenli\u011fi \u00fczerine 500 DevOps profesyoneli ile yap\u0131lan bir Red Hat anketine g\u00f6re:<\/p>\n<ul>\n<li>DevOps profesyonellerinin %55&#8217;i g\u00fcvenlik sorunlar\u0131 nedeniyle bir uygulama s\u00fcr\u00fcm\u00fcn\u00fc erteledi.<\/li>\n<li>%94&#8217;\u00fc ge\u00e7ti\u011fimiz y\u0131l en az bir Kubernetes g\u00fcvenlik olay\u0131 ya\u015fad\u0131.<\/li>\n<li>%59&#8217;u Kubernetes ve konteynerleri kullanmaya devam etme konusundaki en b\u00fcy\u00fck endi\u015felerinin g\u00fcvenlik oldu\u011funu s\u00f6yledi.<\/li>\n<\/ul>\n<h1 id=\"kubernetes-guvenligi-icin-bilmeniz-gereken-en-iyi-uygulamalar\"><strong>Kubernetes G\u00fcvenli\u011fi \u0130\u00e7in Bilmeniz Gereken En \u0130yi Uygulamalar<\/strong><\/h1>\n<p>A\u015fa\u011f\u0131da, Kubernetes k\u00fcmelerinizin g\u00fcvenli\u011fini sa\u011flamak i\u00e7in uygulaman\u0131z gereken kritik en iyi uygulamalar, geli\u015ftirme ya\u015fam d\u00f6ng\u00fcs\u00fcn\u00fcn \u00fc\u00e7 ana a\u015famas\u0131na ayr\u0131lm\u0131\u015ft\u0131r: derleme, da\u011f\u0131tma ve \u00e7al\u0131\u015fma zaman\u0131.<\/p>\n<h2 id=\"1-derleme-zamani-guvenligi\"><strong>1. Derleme Zaman\u0131 G\u00fcvenli\u011fi<\/strong><\/h2>\n<p><a href=\"https:\/\/bulutistan.com\/blog\/yazilim-gelistirme-yasam-dongusu-sdlc-nedir-avantajlari-ve-dezavantajlari-nelerdir\/\">Yaz\u0131l\u0131m geli\u015ftirme ya\u015fam d\u00f6ng\u00fcn\u00fcz\u00fcn (SDLC)<\/a>\u00a0derleme a\u015famas\u0131nda konteynerlerin g\u00fcvenli\u011fini sa\u011flamas\u0131na yard\u0131mc\u0131 olacak temel en iyi uygulamalar\u0131 a\u015fa\u011f\u0131da bulabilirsiniz.<\/p>\n<h3 id=\"goruntu-tarama\"><strong>G\u00f6r\u00fcnt\u00fc Tarama<\/strong><\/h3>\n<p>Bir g\u00f6r\u00fcnt\u00fcden olu\u015fturulan her kapsay\u0131c\u0131, onun g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 devralaca\u011f\u0131ndan, kapsay\u0131c\u0131 g\u00f6r\u00fcnt\u00fclerinin g\u00fcvenlik a\u00e7\u0131klar\u0131ndan ar\u0131nm\u0131\u015f oldu\u011fundan emin olman\u0131z \u00e7ok \u00f6nemlidir. Bu genellikle temel imaj\u0131n ve t\u00fcm paketlerin g\u00fcvenlik a\u00e7\u0131\u011f\u0131 olan bir veri taban\u0131na kar\u015f\u0131 taranmas\u0131yla yap\u0131l\u0131r.<\/p>\n<p>G\u00f6r\u00fcnt\u00fc tarama ara\u00e7lar\u0131 a\u015fa\u011f\u0131dakileri do\u011frular:<\/p>\n<ul>\n<li>Konteyner g\u00f6r\u00fcnt\u00fclerinde yer alan uygulamalar veya kitapl\u0131klar, Common Vulnerabilities and Exposures (CVE&#8217;ler) ile genel kaynaklar taraf\u0131ndan payla\u015f\u0131lan di\u011fer g\u00fcvenlik a\u00e7\u0131klar\u0131ndan muaft\u0131r.<\/li>\n<li>Kapsay\u0131c\u0131 g\u00f6r\u00fcnt\u00fcs\u00fcn\u00fcn olu\u015fturuldu\u011fu temel g\u00f6r\u00fcnt\u00fc, i\u015fletim sistemini (varsa) veya di\u011fer kitapl\u0131klar\u0131 etkileyebilecek g\u00fcvenlik a\u00e7\u0131klar\u0131ndan ar\u0131nd\u0131r\u0131lm\u0131\u015ft\u0131r.<\/li>\n<\/ul>\n<p>G\u00f6r\u00fcnt\u00fcler CI\/CD hatt\u0131n\u0131n t\u00fcm a\u015famalar\u0131nda taranmal\u0131 ve kurcalamay\u0131 \u00f6nlemek i\u00e7in g\u00f6r\u00fcnt\u00fc kay\u0131tlar\u0131na eri\u015fim kontrol edilmelidir.<\/p>\n<h3 id=\"ana-bilgisayar-isletim-sistemi-guclendirme\"><strong>Ana Bilgisayar \u0130\u015fletim Sistemi G\u00fc\u00e7lendirme<\/strong><\/h3>\n<p>Konteynerlerin ana bilgisayarda yaln\u0131zca gerekli minimum ayr\u0131cal\u0131klara sahip oldu\u011fundan emin olun. Sistem \u00e7a\u011fr\u0131lar\u0131n\u0131 ve dosya sistemi eri\u015fimini k\u0131s\u0131tlamak i\u00e7in yeterli kontrollere sahip g\u00fc\u00e7lendirilmi\u015f bir ana bilgisayar i\u015fletim sistemi kullan\u0131n ve i\u015flemler aras\u0131nda g\u00fc\u00e7l\u00fc bir izolasyon sa\u011flay\u0131n. Bu, g\u00fcvenli\u011fi ihlal edilmi\u015f bir konteynerin ana bilgisayar i\u015fletim sistemine veya sistemde \u00e7al\u0131\u015fan di\u011fer konteynerlere eri\u015fim kazand\u0131\u011f\u0131 ayr\u0131cal\u0131k y\u00fckseltme sald\u0131r\u0131lar\u0131n\u0131n \u00f6nlenmesine yard\u0131mc\u0131 olabilir.<\/p>\n<h3 id=\"saldiri-yuzeyinin-minimize-edilmesi-temel-konteyner-goruntuleri\"><strong>Sald\u0131r\u0131 Y\u00fczeyinin Minimize Edilmesi: Temel Konteyner G\u00f6r\u00fcnt\u00fcleri<\/strong><\/h3>\n<p>Konteynerleriniz i\u00e7in temel bir imaj se\u00e7erken, konteynerinizin \u00e7al\u0131\u015fmas\u0131 i\u00e7in kesinlikle gerekli olan minimum yaz\u0131l\u0131m paketlerine sahip bir g\u00f6r\u00fcnt\u00fc kullan\u0131n. Bu noktada tam bir temel imaj olmadan bir konteyner olu\u015fturmak daha da iyidir.<\/p>\n<p>Minimal bir g\u00f6r\u00fcnt\u00fc olu\u015fturmak ve ona eklemek istedi\u011finiz paketleri a\u00e7\u0131k\u00e7a se\u00e7mek i\u00e7in Docker FROM Scratch y\u00f6nergesini kullan\u0131n.<\/p>\n<p>K\u00fc\u00e7\u00fclt\u00fclm\u00fc\u015f bir Linux da\u011f\u0131t\u0131m imaj\u0131ndan (&#8220;distroless&#8221; imaj) veya bir Alpine minimal imaj\u0131ndan ba\u015flay\u0131n.<\/p>\n<h2 id=\"2-dagitim-zamani-guvenligi\"><strong>2. Da\u011f\u0131t\u0131m Zaman\u0131 G\u00fcvenli\u011fi<\/strong><\/h2>\n<p>Konteynerlerinizi \u00fcretime da\u011f\u0131tma zaman\u0131 geldi\u011finde, a\u015fa\u011f\u0131daki \u00f6nlemleri kullanarak onlar\u0131 g\u00fcvence alt\u0131na alabilirsiniz:<\/p>\n<h3 id=\"kubernetes-kumelerinizi-saglamlastirin\"><strong>Kubernetes K\u00fcmelerinizi Sa\u011flamla\u015ft\u0131r\u0131n<\/strong><\/h3>\n<p>Kubernetes k\u00fcme yap\u0131land\u0131rmas\u0131 varsay\u0131lan olarak g\u00fcvenli de\u011fildir. K\u00fcmelerinizin g\u00fcvenli oldu\u011fundan emin olmak i\u00e7in a\u015fa\u011f\u0131daki ad\u0131mlar\u0131 izleyin:<\/p>\n<ul>\n<li>Mevcut Kubernetes k\u00fcme yap\u0131land\u0131rmas\u0131n\u0131 g\u00f6zden ge\u00e7irin ve en iyi g\u00fcvenlik uygulamalar\u0131yla ilgili bo\u015fluklar\u0131 belirleyin. K\u00fcmelerinizi Kubernetes i\u00e7in CIS Benchmark gibi \u00f6l\u00e7\u00fctlerle uyumluluk a\u00e7\u0131s\u0131ndan taramak i\u00e7in kube-bench gibi otomatik ara\u00e7lar\u0131 kullanabilirsiniz.<\/li>\n<li>Olas\u0131 tehditleri belirleyerek ve k\u00fcmenin her bir tehdide nas\u0131l yan\u0131t verece\u011fini ve bu tehditleri nas\u0131l azaltaca\u011f\u0131n\u0131 belirleyerek k\u00fcmenizin her bir bile\u015feni i\u00e7in bir g\u00fcven modeli olu\u015fturun.<\/li>\n<li>G\u00fcven modelinizi uygulamak i\u00e7in etiket taksonomilerini ve etiket y\u00f6neti\u015fimini kullan\u0131n.<\/li>\n<li>K\u00fcmeye eri\u015fimi tan\u0131mlamak i\u00e7in Rol Tabanl\u0131 Eri\u015fim Kontrol\u00fc (RBAC) kurun, bunu tehdit modeliniz ve etiket yap\u0131n\u0131zla uyumlu hale getirin.<\/li>\n<li>etcd, Kubernetes veri deposu ve Kubernetes API sunucusunu \u00e7ok fakt\u00f6rl\u00fc g\u00fcvenlik ve aktar\u0131mdaki veriler i\u00e7in Aktar\u0131m Katman\u0131 G\u00fcvenli\u011fi (TLS) ile g\u00fcvence alt\u0131na al\u0131n ve genel a\u011flara eri\u015fimi s\u0131n\u0131rlay\u0131n.<\/li>\n<\/ul>\n<h3 id=\"guvenlik-araclarini-kubernetes-kumeleri-ile-entegre-etme\"><strong>G\u00fcvenlik Ara\u00e7lar\u0131n\u0131 Kubernetes K\u00fcmeleri ile Entegre Etme<\/strong><\/h3>\n<p>Genellikle, web eri\u015fim kontrol a\u011f ge\u00e7itleri ve Next Generation Firewalls (NGFW) gibi mevcut g\u00fcvenlik ara\u00e7lar\u0131 Kubernetes kaynaklar\u0131n\u0131n fark\u0131nda de\u011fildir. Kubernetes k\u00fcmelerinizi mevcut g\u00fcvenlik ara\u00e7 setiyle entegre ederek bunun \u00fcstesinden gelebilirsiniz. Bu, \u00e7evre g\u00fcvenlik sistemlerinin k\u00fcmelerinizin i\u00e7inde konu\u015fland\u0131r\u0131lan g\u00fcvenlik \u00f6nlemleriyle birlikte \u00e7al\u0131\u015fmas\u0131na olanak tan\u0131r.<\/p>\n<p>Bunu yapman\u0131n etkili bir yolu, i\u015f y\u00fckleriniz taraf\u0131ndan kullan\u0131lan IP adreslerini ve TCP\/UDP ba\u011flant\u0131 noktalar\u0131n\u0131 s\u00fcrekli olarak \u00e7evre g\u00fcvenlik ara\u00e7lar\u0131na beslemek ve onlar\u0131n Kubernetes varl\u0131klar\u0131n\u0131 tan\u0131mlamas\u0131na ve g\u00fcvenli\u011fini sa\u011flamas\u0131na olanak sa\u011flamakt\u0131r.<\/p>\n<p>Di\u011fer bir yakla\u015f\u0131m ise Kubernetes d\u00fc\u011f\u00fcmlerine giden ve Kubernetes d\u00fc\u011f\u00fcmlerinden gelen a\u011f ba\u011flant\u0131s\u0131n\u0131 s\u0131n\u0131rlamak i\u00e7in bulut sa\u011flay\u0131c\u0131 g\u00fcvenlik gruplar\u0131n\u0131 kullanmakt\u0131r. G\u00fcvenlik gruplar\u0131, geleneksel g\u00fcvenlik ara\u00e7lar\u0131na k\u0131yasla Kubernetes mimarisiyle daha uyumludur.<\/p>\n<h2 id=\"3-calisma-zamani-guvenligi\"><strong>3. \u00c7al\u0131\u015fma Zaman\u0131 G\u00fcvenli\u011fi<\/strong><\/h2>\n<p>\u00c7al\u0131\u015fma zaman\u0131 s\u0131ras\u0131nda Kubernetes k\u00fcme altyap\u0131s\u0131n\u0131 ve i\u015f y\u00fcklerini g\u00fcvence alt\u0131na alman\u0131za yard\u0131mc\u0131 olabilecek en iyi uygulamalar\u0131 a\u015fa\u011f\u0131daki listede bulabilirsiniz:<\/p>\n<h3 id=\"ag-guvenligi-kontrolleri\"><strong>A\u011f G\u00fcvenli\u011fi Kontrolleri<\/strong><\/h3>\n<p>Kubernetes ortamlar\u0131ndaki kritik bir endi\u015fe, kurumsal a\u011flardaki g\u00fcvenlik kontrollerinin yan\u0131 s\u0131ra bulut sa\u011flay\u0131c\u0131lar\u0131 taraf\u0131ndan y\u00f6netilen g\u00fcvenlik gruplar\u0131n\u0131n da d\u00fc\u011f\u00fcm d\u00fczeyine odaklanm\u0131\u015f olmas\u0131d\u0131r. Bir d\u00fc\u011f\u00fcme giden ve d\u00fc\u011f\u00fcmden \u00e7\u0131kan trafi\u011fi kontrol edebilirsiniz ,ancak mevcut kontroller, bir d\u00fc\u011f\u00fcmde hangi b\u00f6lmenin veya hizmetin \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 bilmez. Bu da g\u00fcvenlik kontrollerini \u00e7al\u0131\u015fma zaman\u0131nda b\u00fcy\u00fck \u00f6l\u00e7\u00fcde etkisiz hale getirir, \u00e7\u00fcnk\u00fc ayn\u0131 d\u00fc\u011f\u00fcmde farkl\u0131 zamanlarda farkl\u0131 hizmetler \u00e7al\u0131\u015f\u0131yor olabilir ve her birinin kendi g\u00fcvenlik gereksinimleri vard\u0131r.<\/p>\n<p>Kubernetes i\u015f y\u00fckleri dinamiktir ve otomatikle\u015ftirilmi\u015f CI\/CD s\u00fcre\u00e7leri, Kubernetes k\u00fcme d\u00fc\u011f\u00fcmlerinde s\u00fcrekli olarak farkl\u0131 hizmetleri veya ayn\u0131 hizmetlerin yeni s\u00fcr\u00fcmlerini da\u011f\u0131t\u0131r. \u0130\u015fleri daha da karma\u015f\u0131k hale getirmek i\u00e7in, ayn\u0131 i\u015f y\u00fckleri, her biri kendi a\u011f g\u00fcvenlik kontrollerine sahip olan \u015firket i\u00e7i ve farkl\u0131 bulut ortamlar\u0131 aras\u0131nda ge\u00e7i\u015f yapabilir.<\/p>\n<p>Kubernetes ortam\u0131nda a\u011f g\u00fcvenli\u011fini sa\u011flamak i\u00e7in bildirime dayal\u0131 bir model kullanarak i\u015f y\u00fcklerinize a\u011f g\u00fcvenli\u011fi tan\u0131mlar\u0131 olu\u015fturman\u0131z gerekir. G\u00fcvenlik tan\u0131mlar\u0131 Kubernetes i\u015f y\u00fcklerinin ayr\u0131lmaz bir par\u00e7as\u0131 olmal\u0131 ve Kubernetes da\u011f\u0131t\u0131mlar\u0131 ile veri merkezleri aras\u0131nda ta\u015f\u0131nabilir olmal\u0131d\u0131r. \u0130\u015f y\u00fck\u00fc nerede \u00e7al\u0131\u015f\u0131rsa \u00e7al\u0131\u015fs\u0131n g\u00fcvenlik tan\u0131mlar\u0131n\u0131 her zaman yan\u0131nda ta\u015f\u0131mal\u0131d\u0131r. Bu iki \u015fekilde ba\u015far\u0131labilir:<\/p>\n<ul>\n<li><strong>Kubernetes&#8217;te yerel bir a\u011f politikas\u0131 \u00e7\u00f6z\u00fcm\u00fc kullanma\u00a0<\/strong>&#8211; Calico, Weavenet, Kube-router ve Antrea buna birka\u00e7 \u00f6rnektir. Bu ara\u00e7lar, a\u011f katmanlar\u0131 3 ve 4&#8217;te (TCP\/IP) bir a\u011f politikas\u0131 uygular.<\/li>\n<li><strong>Kubernetes&#8217;te yerel bir proxy kullanma<\/strong>\u00a0\u2013 Yayg\u0131n olarak kullan\u0131lan bir proxy, Envoy&#8217;dur. Bu, mikro hizmetler aras\u0131ndaki ileti\u015fimi g\u00fcvenli hale getirmek i\u00e7in a\u011f katman\u0131 7&#8217;de (HTTP\/HTTPS) uygulama katman\u0131 ilkesinin tan\u0131mlanmas\u0131na yard\u0131mc\u0131 olabilir. G\u00fcvenlik ilkelerini proxy d\u00fczeyinde tan\u0131mlamak, \u00f6rne\u011fin belirli bir mikro hizmetin yaln\u0131zca HTTP GET isteklerini kabul etmesi ve HTTP POST isteklerini reddetmesi gerekti\u011fini tan\u0131mlaman\u0131za yard\u0131mc\u0131 olabilir.<\/li>\n<\/ul>\n<h3 id=\"kurumsal-guvenlik-kontrolleri\"><strong>Kurumsal G\u00fcvenlik Kontrolleri<\/strong><\/h3>\n<p>A\u011f g\u00fcvenlik kontrollerine ek olarak, Kubernetes ortam\u0131n\u0131za a\u015fa\u011f\u0131daki kurumsal g\u00fcvenlik kontrollerini uygulay\u0131n:<\/p>\n<ul>\n<li><strong>Aktar\u0131mdaki verileri \u015fifreleyin<\/strong>\u00a0&#8211; Bunu i\u015f y\u00fckleri i\u00e7in TLS \u015fifrelemeyi etkinle\u015ftirerek, kar\u015f\u0131l\u0131kl\u0131 TLS&#8217;yi etkinle\u015ftirmek i\u00e7in bir hizmet a\u011f\u0131ndan yararlanarak veya a\u00e7\u0131k kaynakl\u0131 WireGuard gibi ara\u00e7larla bir VPN yakla\u015f\u0131m\u0131 kullanarak ger\u00e7ekle\u015ftirebilirsiniz.<\/li>\n<li><strong>Uyumluluk raporlar\u0131n\u0131 otomatikle\u015ftirin\u00a0<\/strong>&#8211; PCI, HIPAA, GDPR ve SOC2 gibi ilgili uyumluluk standartlar\u0131 i\u00e7in otomatik raporlar\u0131 m\u00fcmk\u00fcn k\u0131lacak \u015fekilde veri toplad\u0131\u011f\u0131n\u0131zdan emin olun.<\/li>\n<li><strong>S\u00fcrekli uyumlulu\u011fu hedefleyin<\/strong>\u00a0&#8211; Uyumluluk sorunlar\u0131n\u0131 kontrol etmek ve d\u00fczeltmek i\u00e7in Kubernetes&#8217;e \u00f6zg\u00fc otomasyonu kullan\u0131n. \u00d6rne\u011fin, bir pod uyumluluk kontrol\u00fcnde ba\u015far\u0131s\u0131z olursa, k\u00fcme kapsay\u0131c\u0131 g\u00f6r\u00fcnt\u00fcs\u00fcn\u00fc otomatik olarak g\u00fcncelleyebilir veya sorun giderilene kadar pod&#8217;u kapatabilir.<\/li>\n<\/ul>\n<h3 id=\"tehdit-savunmasi\"><strong>Tehdit Savunmas\u0131<\/strong><\/h3>\n<p>Kubernetes k\u00fcmesindeki k\u00f6t\u00fc niyetli faaliyetler, bilgisayar korsanlar\u0131n\u0131n konteynerlerde \u00e7al\u0131\u015fan bile\u015fenlerdeki g\u00fcvenlik a\u00e7\u0131klar\u0131ndan yararlanmas\u0131n\u0131, g\u00fcvensiz yap\u0131land\u0131rmalardan faydalanmas\u0131n\u0131 veya d\u00fc\u011f\u00fcmlere, podlara veya Kubernetes kontrol d\u00fczlemine k\u00f6t\u00fc niyetli trafik y\u00f6nlendirmesini i\u00e7erebilir.<\/p>\n<p>Bir Kubernetes k\u00fcmesini tehditlere kar\u015f\u0131 savunmak i\u00e7in iki temel yetene\u011fe ihtiyac\u0131n\u0131z vard\u0131r:<\/p>\n<ul>\n<li><strong>\u0130zinsiz giri\u015f tespiti<\/strong>\u00a0&#8211; Verileri analiz etme, anormallikleri belirleme ve g\u00fcvenlik olaylar\u0131n\u0131 \u00f6nceliklendirme becerisi.<\/li>\n<li><strong>\u0130zinsiz giri\u015f \u00f6nleme<\/strong>\u00a0&#8211; K\u00f6t\u00fc niyetli etkinlikleri engelleme ve siber sald\u0131r\u0131lara yan\u0131t verme becerisi.<\/li>\n<\/ul>\n<p>\u0130zinsiz giri\u015fleri tespit etmeye \u00e7al\u0131\u015f\u0131rken kar\u015f\u0131la\u015f\u0131lan \u00f6nemli bir zorluk, Kubernetes k\u00fcmesinin \u00e7ok b\u00fcy\u00fck miktarlarda g\u00fcnl\u00fck verisi olu\u015fturmas\u0131d\u0131r. Verileri daha y\u00f6netilebilir hale getirmek ve g\u00fcvenlik i\u00e7g\u00f6r\u00fcleri elde etmek i\u00e7in a\u015fa\u011f\u0131daki y\u00f6nergeleri kullanman\u0131z gerekir:<\/p>\n<ul>\n<li><strong>Pod&#8217;lara g\u00f6re toplama<\/strong>\u00a0&#8211; Geleneksel 5&#8217;li tekni\u011fi (Kaynak IP, Kaynak Port, Hedef IP, Hedef Port, Protokol) kullanmak yerine, belirli bir port \u00fczerinden ileti\u015fim kuran &#8220;benzer&#8221; pod&#8217;lar\u0131 bir araya getirin.<\/li>\n<li><strong>Makine \u00f6\u011freniminden yararlan\u0131n<\/strong>\u00a0&#8211; Anormallikleri tespit etmek i\u00e7in pod trafi\u011fi metriklerini otomatik olarak analiz edebilen ara\u00e7lar kullan\u0131n.<\/li>\n<li><strong>Tehdit istihbarat\u0131n\u0131 kullan\u0131n<\/strong>\u00a0&#8211; K\u00fcmenizdeki k\u00f6t\u00fc ama\u00e7l\u0131 trafi\u011fi tan\u0131mlamak i\u00e7in bilinen k\u00f6t\u00fc ama\u00e7l\u0131 IP&#8217;lerin ve alan adlar\u0131n\u0131n veri tabanlar\u0131ndan yararlan\u0131n.<\/li>\n<\/ul>\n<h1 id=\"kubernetes-guvenlik-cozumleri\"><strong>Kubernetes G\u00fcvenlik \u00c7\u00f6z\u00fcmleri<\/strong><\/h1>\n<p>Geleneksel g\u00fcvenlik ara\u00e7lar\u0131, Kubernetes gibi s\u00fcrekli olarak yeni konteynerler da\u011f\u0131tan ve eskilerini kullan\u0131mdan kald\u0131ran son derece dinamik bir ortamla, \u00f6zellikle de b\u00fcy\u00fck \u00f6l\u00e7ekte ba\u015fa \u00e7\u0131kamaz. \u00d6rne\u011fin, t\u00fcm uygulama i\u00e7in tek bir \u00e7evresel g\u00fcvenlik duvar\u0131 kullanmak sizi daha b\u00fcy\u00fck risklere maruz b\u0131rakabilir, \u00e7\u00fcnk\u00fc bilgisayar korsanlar\u0131 g\u00fcvenlik duvar\u0131n\u0131 a\u015ft\u0131\u011f\u0131nda t\u00fcm sisteme eri\u015fim kazan\u0131r.<\/p>\n<p>Konteynerlerin dinamik do\u011fas\u0131na ek olarak, g\u00fcvenlik standartlar\u0131 da s\u00fcrekli de\u011fi\u015fime u\u011framakta ve genellikle geleneksel g\u00fcvenlik \u00e7\u00f6z\u00fcmlerinin ayak uydurabilece\u011finden daha h\u0131zl\u0131 bir \u015fekilde y\u00fckseltilmektedir. Bu s\u00fcrekli de\u011fi\u015fen ortam\u0131 y\u00f6netmenize yard\u0131mc\u0131 olacak geli\u015fmi\u015f g\u00fcvenlik ara\u00e7lar\u0131na ihtiyac\u0131n\u0131z vard\u0131r.<\/p>\n<p>Kubernetes varsay\u0131lan olarak, IP tabanl\u0131 g\u00fcvenlik sa\u011flamak i\u00e7in k\u00fcmedeki her pod&#8217;a bir IP adresi atar. Bununla birlikte, yaln\u0131zca temel g\u00fcvenlik \u00f6nlemlerini i\u00e7erir, bu da y\u00f6neticilerin genellikle Kubernetes y\u0131\u011f\u0131n\u0131n\u0131n g\u00fcvenli\u011fini sa\u011flamak i\u00e7in tasarlanm\u0131\u015f \u00fc\u00e7\u00fcnc\u00fc taraf ara\u00e7lar\u0131 kullanarak geli\u015fmi\u015f g\u00fcvenlik izleme ve uyumluluk uygulamalar\u0131n\u0131 ele almalar\u0131 gerekti\u011fi anlam\u0131na gelir.<\/p>\n<p>Geli\u015fmi\u015f Kubernetes g\u00fcvenlik ara\u00e7lar\u0131, g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 tespit etmek ve her bir konteynerin ama\u00e7land\u0131\u011f\u0131 gibi \u00e7al\u0131\u015fmas\u0131n\u0131 sa\u011flamak gibi \u00e7e\u015fitli yetenekler sunar. Konteyner g\u00fcvenlik s\u00fcre\u00e7leri, konteyner ana bilgisayar\u0131n\u0131, y\u00f6netim y\u0131\u011f\u0131n\u0131n\u0131 ve a\u011f trafi\u011fini korumak i\u00e7in s\u00fcrekli olarak \u00e7al\u0131\u015fmal\u0131 ve ayn\u0131 zamanda yap\u0131 hatt\u0131n\u0131n b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc ve uygulaman\u0131n g\u00fcvenli\u011fini izlemelidir.<\/p>\n<h1 id=\"baslica-kubernetes-guvenlik-sorunlari-nelerdir\"><strong>Ba\u015fl\u0131ca Kubernetes G\u00fcvenlik Sorunlar\u0131 Nelerdir?<\/strong><\/h1>\n<p>A\u015fa\u011f\u0131da Kubernetes \u00fcretim da\u011f\u0131t\u0131mlar\u0131n\u0131n kar\u015f\u0131 kar\u015f\u0131ya oldu\u011fu ana risklerden baz\u0131lar\u0131n\u0131 bulabilirsiniz:<\/p>\n<h2 id=\"1-guvenligi-tehlikede-olan-goruntuler-ve-goruntu-kayitlari\"><strong>1. G\u00fcvenli\u011fi Tehlikede Olan G\u00f6r\u00fcnt\u00fcler ve G\u00f6r\u00fcnt\u00fc Kay\u0131tlar\u0131<\/strong><\/h2>\n<p>G\u00f6r\u00fcnt\u00fclerin g\u00fcvenli\u011fini sa\u011flamak i\u00e7in i\u015fletmelerin, g\u00f6r\u00fcnt\u00fclerin g\u00fcvenli bir \u015fekilde olu\u015fturulmas\u0131n\u0131 ve g\u00fcvenilir kay\u0131tlarda saklanmas\u0131n\u0131 sa\u011flayan g\u00fc\u00e7l\u00fc y\u00f6netim politikalar\u0131 uygulamas\u0131 gerekir. \u00d6rne\u011fin i\u015fletmeler, konteyner g\u00f6r\u00fcnt\u00fclerinin, sorunlara ve g\u00fcvenlik a\u00e7\u0131klar\u0131na kar\u015f\u0131 d\u00fczenli olarak taranmas\u0131 gereken, \u00f6nceden onaylanm\u0131\u015f ve g\u00fcvenli temel g\u00f6r\u00fcnt\u00fcler kullan\u0131larak olu\u015fturuldu\u011fundan emin olmal\u0131d\u0131r.<\/p>\n<p>\u0130\u015fletmeler, kullan\u0131m\u0131na izin verilen g\u00f6r\u00fcnt\u00fc kay\u0131tlar\u0131n\u0131n bir listesini olu\u015fturarak kay\u0131tlar\u0131 standartla\u015ft\u0131rmal\u0131d\u0131r. Kurcalamay\u0131 \u00f6nlemek i\u00e7in, bir Kubernetes k\u00fcmesinde kapsay\u0131c\u0131lar olu\u015fturmak i\u00e7in kullan\u0131lmadan \u00f6nce g\u00f6r\u00fcnt\u00fcler her zaman taranmal\u0131d\u0131r.<\/p>\n<h2 id=\"2-guvenligi-tehlikeye-giren-konteynerler-veya-kotu-amacli-trafik\"><strong>2. G\u00fcvenli\u011fi Tehlikeye Giren Konteynerler veya K\u00f6t\u00fc Ama\u00e7l\u0131 Trafik<\/strong><\/h2>\n<p>Normal operasyonlar\u0131n bir par\u00e7as\u0131 olarak konteynerlerin ve podlar\u0131n birbirleriyle ileti\u015fim kurmas\u0131 gerekir. Ancak bu ileti\u015fim bilgisayar korsanlar\u0131 taraf\u0131ndan istismar edilebilir. \u0130hlal edilen bir konteyner di\u011fer konteynerleri ve podlar\u0131 etkileyebilir.<\/p>\n<p>\u0130leti\u015fimin g\u00fcvenli oldu\u011fundan emin olmak i\u00e7in i\u015fletmeler, ileti\u015fimi i\u015f y\u00fcklerinin \u00e7al\u0131\u015fmas\u0131 i\u00e7in gereken minimum d\u00fczeyde s\u0131n\u0131rlayan a\u011f politikalar\u0131n\u0131 uygulamaya koymal\u0131d\u0131r. Buna k\u00fcme i\u00e7indeki hem kuzey-g\u00fcney trafi\u011fi (giri\u015f\/\u00e7\u0131k\u0131\u015f trafi\u011fi) hem de do\u011fu-bat\u0131 trafi\u011fi dahildir. Verimlili\u011fe zarar vermemelerini sa\u011flamak i\u00e7in a\u011f politikalar\u0131 otomatik olarak ayarlanmal\u0131d\u0131r.<\/p>\n<h2 id=\"3-gorunurluk-eksikligi\"><strong>3. G\u00f6r\u00fcn\u00fcrl\u00fck Eksikli\u011fi<\/strong><\/h2>\n<p>G\u00fcvenli\u011fin s\u00fcrd\u00fcr\u00fclmesini sa\u011flamak i\u00e7in g\u00f6r\u00fcn\u00fcrl\u00fck kritik \u00f6neme sahiptir. Ancak karma\u015f\u0131k, da\u011f\u0131t\u0131lm\u0131\u015f, kapsay\u0131c\u0131ya al\u0131nm\u0131\u015f ortamlarda g\u00f6r\u00fcn\u00fcrl\u00fck elde etmek zor olabilir.<\/p>\n<ul>\n<li>Planlanan, da\u011f\u0131t\u0131lan ve sonland\u0131r\u0131lan \u00e7ok say\u0131da konteyner olabilir; bunlar\u0131n hepsinin izlenmesi ve y\u00f6netilmesi gerekir.<\/li>\n<li>Konteynerli i\u015f y\u00fck\u00fcn\u00fcn da\u011f\u0131t\u0131lm\u0131\u015f ve dinamik yap\u0131s\u0131, ilgili \u00f6l\u00e7\u00fcmlerin toplanmas\u0131n\u0131, izlenmesini ve anla\u015f\u0131lmas\u0131n\u0131 zorla\u015ft\u0131r\u0131r.<\/li>\n<li>Kubernetes, \u00e7oklu bulut veya hibrit bulut ortamlar\u0131nda devreye al\u0131nabilir. Her bulut sat\u0131c\u0131s\u0131 kendi izleme ve g\u00f6r\u00fcn\u00fcrl\u00fck ara\u00e7lar\u0131n\u0131 sa\u011flar ve ortamlar aras\u0131nda tutarl\u0131 g\u00f6r\u00fcn\u00fcrl\u00fc\u011fe izin vermek \u00e7ok zorla\u015f\u0131r.<\/li>\n<\/ul>\n<p>G\u00f6r\u00fcn\u00fcrl\u00fck olmadan uygulamalar\u0131n g\u00fcvenli\u011fini sa\u011flamak zor, hatta imkans\u0131z olabilir. G\u00f6r\u00fcn\u00fcrl\u00fck olmadan, bilgisayar korsanlar\u0131 bunlar\u0131 kullanmadan \u00f6nce kritik g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 tespit etmek veya yanl\u0131\u015f yap\u0131land\u0131rmalar\u0131 ke\u015ffetmek m\u00fcmk\u00fcn de\u011fildir. G\u00f6r\u00fcn\u00fcrl\u00fck, siber sald\u0131r\u0131lar\u0131 tespit etmek amac\u0131yla \u00e7al\u0131\u015fma zaman\u0131nda konteynerleri izlemek ve art\u0131k kullan\u0131lmayan konteynerleri bir sorumluluk haline gelmeden \u00f6nce uygun \u015fekilde kullan\u0131mdan kald\u0131rmak amac\u0131yla takip etmek i\u00e7in de kritik \u00f6neme sahiptir.<\/p>\n<h2 id=\"4-guvenli-olmayan-varsayilan-yapilandirmalar\"><strong>4. G\u00fcvenli Olmayan Varsay\u0131lan Yap\u0131land\u0131rmalar<\/strong><\/h2>\n<p>Kubernetes, uygulamalar\u0131n da\u011f\u0131t\u0131m\u0131n\u0131 h\u0131zland\u0131rmak, operasyonlar\u0131 ve y\u00f6netimi basitle\u015ftirmek i\u00e7in geli\u015ftirilmi\u015ftir. Kubernetes, i\u015fletmelerin k\u00fcme ve uygulamalar\u0131 etkili bir \u015fekilde g\u00fcvence alt\u0131na almas\u0131na yard\u0131mc\u0131 olabilecek geni\u015f bir denetim yelpazesi sunsa da, kullan\u0131ma haz\u0131r g\u00fcvenli yap\u0131land\u0131rmalar sa\u011flamaz.<\/p>\n<p>\u00d6rne\u011fin, Kubernetes a\u011f ilkeleri g\u00fcvenlik duvar\u0131 kurallar\u0131na benzer \u015fekilde davranarak podlar\u0131n birbirleriyle ve di\u011fer u\u00e7 noktalarla nas\u0131l ileti\u015fim kurabilece\u011fini kontrol eder. Bir pod&#8217;a bir a\u011f ilkesi atand\u0131\u011f\u0131nda, yaln\u0131zca a\u011f ilkesinde bildirilen varl\u0131klarla ileti\u015fim kurmas\u0131na izin verilir. Ancak Kubernetes varsay\u0131lan olarak podlara a\u011f ilkeleri uygulamaz. Bu, da\u011f\u0131t\u0131ld\u0131ktan sonra t\u00fcm podlar\u0131n Kubernetes ortam\u0131ndaki di\u011fer t\u00fcm podlarla konu\u015fabilece\u011fi anlam\u0131na gelir. Bu, t\u00fcm k\u00fcme kaynaklar\u0131n\u0131n uygun g\u00fcvenlik politikalar\u0131na sahip olmas\u0131n\u0131 sa\u011flamay\u0131 kritik hale getirir.<\/p>\n<p>Bir ba\u015fka endi\u015fe de gizli y\u00f6netimdir. Gizli diziler, anahtarlar ve kimlik bilgileri gibi hassas bilgilere nas\u0131l eri\u015filece\u011fini ve bu bilgilerin nas\u0131l saklanaca\u011f\u0131n\u0131 tan\u0131mlar. Gizli dizileri y\u00f6netirken, bunlar\u0131n ortam de\u011fi\u015fkenleri olarak kullan\u0131lmad\u0131\u011f\u0131ndan veya imajlar i\u00e7inde sabit kodlanmad\u0131\u011f\u0131ndan emin olmak \u00e7ok \u00f6nemlidir. Bu noktada gizli diziler, s\u0131rlar\u0131 yetkisiz taraflardan korumak i\u00e7in dikkatli eri\u015fim kontrol\u00fc ile konteynerlere harici olarak y\u00f6netilmelidir.<\/p>\n","protected":false},"excerpt":{"rendered":"Kubernetes\u00a0ortamlar\u0131n\u0131n dinamik yap\u0131s\u0131, \u00f6zel savunma stratejileri ve ara\u00e7lar\u0131 gerektiren benzersiz g\u00fcvenlik risklerini de beraberinde getirir. Bu y\u00fczden daha&hellip;\n","protected":false},"author":1,"featured_media":4368,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_singular_sidebar":"","csco_page_header_type":"","csco_appearance_grid":"","csco_page_load_nextpost":"","csco_post_video_location":[],"csco_post_video_location_hash":"","csco_post_video_url":"","csco_post_video_bg_start_time":0,"csco_post_video_bg_end_time":0},"categories":[7,1,11],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Kubernetes G\u00fcvenli\u011fi \u0130\u00e7in Bilmeniz Gereken En \u0130yi Uygulamalar - Bulutistan Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bulutistan.com\/blog\/kubernetes-guvenligi-icin-bilmeniz-gereken-en-iyi-uygulamalar\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kubernetes G\u00fcvenli\u011fi \u0130\u00e7in Bilmeniz Gereken En \u0130yi Uygulamalar - Bulutistan Blog\" \/>\n<meta property=\"og:description\" content=\"Kubernetes\u00a0ortamlar\u0131n\u0131n dinamik yap\u0131s\u0131, \u00f6zel savunma stratejileri ve ara\u00e7lar\u0131 gerektiren benzersiz g\u00fcvenlik risklerini de beraberinde getirir. 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