{"id":86311,"date":"2020-06-24T01:42:11","date_gmt":"2020-06-23T23:42:11","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/lomaem-klaster-kubernetes-cherez-helm-v2-tiller"},"modified":"2020-06-24T01:42:11","modified_gmt":"2020-06-23T23:42:11","slug":"lomaem-klaster-kubernetes-cherez-helm-v2-tiller","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/administrirovanie\/lomaem-klaster-kubernetes-cherez-helm-v2-tiller","title":{"rendered":"A Kubernetes klaszter megt\u00f6r\u00e9se Helm v2 tiller seg\u00edts\u00e9g\u00e9vel","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"A Kubernetes klaszter megt\u00f6r\u00e9se Helm v2 tiller seg\u00edts\u00e9g\u00e9vel\" src=\"\/wp-content\/uploads\/2020\/06\/9fced786f84d95b0291c33eef4012828.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>A Helm \u2014 csomagkezel\u0151 Kuberneteshez, valami hasonl\u00f3 <code>apt-get<\/code> az Ubuntu sz\u00e1m\u00e1ra. Ebben a jegyzetben az el\u0151z\u0151 helm verzi\u00f3t (v2) fogjuk megn\u00e9zni, amelynek alap\u00e9rtelmezett szolg\u00e1ltat\u00e1sa a tiller, amely lehet\u0151v\u00e9 teszi a klaszterhez val\u00f3 hozz\u00e1f\u00e9r\u00e9st.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p>K\u00e9sz\u00edts\u00fck el\u0151 a klasztert, ehhez futtassuk a parancsot:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">kubectl run --rm --restart=Never -it --image=madhuakula\/k8s-goat-helm-tiller -- bash<\/code><\/pre>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"A Kubernetes klaszter megt\u00f6r\u00e9se Helm v2 tiller seg\u00edts\u00e9g\u00e9vel\" src=\"\/wp-content\/uploads\/2020\/06\/6b5ac23e43a57548ee7a0a90e0d1a3f5.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<h2 id=\"demonstraciya\">Demonstr\u00e1ci\u00f3<\/h2>\n<p><\/p>\n<ul>\n<li>Ha semmit nem \u00e1ll\u00edtunk be k\u00fcl\u00f6n, a helm v2 elind\u00edt egy tiller szolg\u00e1ltat\u00e1st, amelynek teljes adminisztr\u00e1tori jogosults\u00e1gai vannak a klaszterhez.<\/li>\n<li>A telep\u00edt\u00e9s ut\u00e1n a namespace-ben <code>kube-system<\/code> egy gomb, amely lehet\u0151v\u00e9 teszi a proxy haszn\u00e1lat\u00e1nak aktiv\u00e1l\u00e1s\u00e1t \u00e9s deakt\u00e1l\u00e1s\u00e1t, valamint az \u00e1llapot ellen\u0151rz\u00e9s\u00e9t. A Private Network funkci\u00f3 tesztel\u00e9se csak az amerikai Firefox asztali verzi\u00f3j\u00fa felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra \u00e9rhet\u0151 el. A tesztel\u00e9s sor\u00e1n a szolg\u00e1ltat\u00e1s ingyenesen \u00e1ll rendelkez\u00e9sre, de a v\u00e9gs\u0151 szolg\u00e1ltat\u00e1s val\u00f3sz\u00edn\u0171leg <code>tiller-deploy<\/code>, valamint megny\u00edlik a 44134-es port, amely a 0.0.0.0-hoz van k\u00f6tve. Ezt a telnet seg\u00edts\u00e9g\u00e9vel ellen\u0151rizhetj\u00fck.<\/li>\n<\/ul>\n<p><\/p>\n<pre><code class=\"plaintext\">$ telnet tiller-deploy.kube-system 44134<\/code><\/pre>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"A Kubernetes klaszter megt\u00f6r\u00e9se Helm v2 tiller seg\u00edts\u00e9g\u00e9vel\" src=\"\/wp-content\/uploads\/2020\/06\/9f6dccf8380ef5cba905bcd0f2785778.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<ul>\n<li>Most csatlakozhatunk a tiller szolg\u00e1ltat\u00e1shoz. A helm bin\u00e1ris\u00e1t fogjuk haszn\u00e1lni a tiller szolg\u00e1ltat\u00e1ssal val\u00f3 kommunik\u00e1ci\u00f3hoz:<\/li>\n<\/ul>\n<p><\/p>\n<pre><code class=\"plaintext\">$ helm --host tiller-deploy.kube-system:44134 version<\/code><\/pre>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"A Kubernetes klaszter megt\u00f6r\u00e9se Helm v2 tiller seg\u00edts\u00e9g\u00e9vel\" src=\"\/wp-content\/uploads\/2020\/06\/34d6abdc649f21b3124b0569779e2e40.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<ul>\n<li>Pr\u00f3b\u00e1ljuk meg lek\u00e9rdezni a Kubernetes klaszter titkait a namespace-b\u0151l <code>kube-system<\/code>:<\/li>\n<\/ul>\n<p><\/p>\n<pre><code class=\"plaintext\">$ kubectl get secrets -n kube-system<\/code><\/pre>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"A Kubernetes klaszter megt\u00f6r\u00e9se Helm v2 tiller seg\u00edts\u00e9g\u00e9vel\" src=\"\/wp-content\/uploads\/2020\/06\/7c4d24f4fb518574e2c41d51239d5466.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<ul>\n<li>Most l\u00e9trehozhatjuk a saj\u00e1t chartunkat, amelyben l\u00e9trehozunk egy adminisztr\u00e1tori jogokkal rendelkez\u0151 szerepet, \u00e9s ezt a szerepet hozz\u00e1rendelj\u00fck az alap\u00e9rtelmezett szolg\u00e1ltat\u00e1si fi\u00f3knak. Ennek a szolg\u00e1ltat\u00e1si fi\u00f3knak a tokenj\u00e9t haszn\u00e1lva teljes hozz\u00e1f\u00e9r\u00e9st kaptunk a klaszter\u00fcnkh\u00f6z.<\/li>\n<\/ul>\n<p><\/p>\n<pre><code class=\"plaintext\">$ helm --host tiller-deploy.kube-system:44134 install \/pwnchart<\/code><\/pre>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"A Kubernetes klaszter megt\u00f6r\u00e9se Helm v2 tiller seg\u00edts\u00e9g\u00e9vel\" src=\"\/wp-content\/uploads\/2020\/06\/103412d1497efb0370f5faf7087b66d1.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<ul>\n<li>Most, hogy a <code>pwnchart<\/code> telep\u00edtve van, az alap\u00e9rtelmezett szolg\u00e1ltat\u00e1si fi\u00f3knak teljes adminisztr\u00e1tori hozz\u00e1f\u00e9r\u00e9se van. Ellen\u0151rizz\u00fck \u00fajra a titkok lek\u00e9rdez\u00e9s\u00e9t <code>kube-system<\/code><\/li>\n<\/ul>\n<p><\/p>\n<pre><code class=\"plaintext\">$ kubectl get secrets -n kube-system<\/code><\/pre>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"A Kubernetes klaszter megt\u00f6r\u00e9se Helm v2 tiller seg\u00edts\u00e9g\u00e9vel\" src=\"\/wp-content\/uploads\/2020\/06\/58fc4da5f4e5a4d8c4117e9298e2740f.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>A forgat\u00f3k\u00f6nyv sikeres v\u00e9grehajt\u00e1sa att\u00f3l f\u00fcgg, hogyan telep\u00edtett\u00e9k a tillert; n\u00e9ha az adminisztr\u00e1torok egy k\u00fcl\u00f6n namespace-en m\u00e1s jogosults\u00e1gokkal telep\u00edtik. A Helm 3 nem szenved ilyen sebezhet\u0151s\u00e9gekt\u0151l, mivel nem tartalmaz tillert.<\/p>\n<p><\/p>\n<p><em><strong>Ford\u00edt\u00f3 megjegyz\u00e9se:<\/strong> A h\u00e1l\u00f3zati politik\u00e1k haszn\u00e1lata a forgalom kisz\u0171r\u00e9s\u00e9re a klaszterben seg\u00edt megv\u00e9deni az ilyen t\u00edpus\u00fa sebezhet\u0151s\u00e9gekt\u0151l. <\/em><\/p>\n<p>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/southbridge\/blog\/507656\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>Helm \u2014 \u043f\u0430\u043a\u0435\u0442\u043d\u044b\u0439 \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440 \u0434\u043b\u044f Kubernetes, \u0447\u0442\u043e-\u0442\u043e \u0432\u0440\u043e\u0434\u0435 apt-get \u0434\u043b\u044f Ubuntu. \u0412 \u044d\u0442\u043e\u0439 \u0437\u0430\u043c\u0435\u0442\u043a\u0435 \u043c\u044b \u0443\u0432\u0438\u0434\u0438\u043c \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0443\u044e \u0432\u0435\u0440\u0441\u0438\u044e helm (v2) \u0441 \u0441\u0435\u0440\u0432\u0438\u0441\u043e\u043c tiller, \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043d\u044b\u043c \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e, \u0447\u0435\u0440\u0435\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u043e\u043b\u0443\u0447\u0438\u043c \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u043a\u043b\u0430\u0441\u0442\u0435\u0440\u0443. \u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u0438\u043c \u043a\u043b\u0430\u0441\u0442\u0435\u0440, \u0434\u043b\u044f \u044d\u0442\u043e\u0433\u043e \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u043c \u043a\u043e\u043c\u0430\u043d\u0434\u0443: kubectl run &#8212;rm &#8212;restart=Never -it &#8212;image=madhuakula\/k8s-goat-helm-tiller &#8212; bash \u0414\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0430\u0446\u0438\u044f \u0415\u0441\u043b\u0438 \u043d\u0438\u0447\u0435\u0433\u043e \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u043d\u0435 \u043d\u0430\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0442\u044c, helm v2 \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0435\u0442 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":86312,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-86311","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Helm \u2014 \u043f\u0430\u043a\u0435\u0442\u043d\u044b\u0439 \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440 \u0434\u043b\u044f.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" 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