{"id":9143,"date":"2022-06-16T17:36:03","date_gmt":"2022-06-16T09:36:03","guid":{"rendered":"https:\/\/blog.ywdevops.cn\/?p=9143"},"modified":"2023-04-07T14:38:21","modified_gmt":"2023-04-07T06:38:21","slug":"networkpolicy","status":"publish","type":"post","link":"https:\/\/blog.ywdevops.cn\/index.php\/2022\/06\/16\/networkpolicy\/","title":{"rendered":"k8s\u4e4b\u7f51\u7edc\u7b56\u7565"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u7f51\u7edc\u7b56\u7565\u662f\u63a7\u5236Pod\u8d44\u6e90\u7ec4\u95f4\u4ee5\u53ca\u4e0e\u5176\u4ed6\u7f51\u7edc\u7aef\u70b9\u95f4\u5982\u4f55\u8fdb\u884c\u901a\u4fe1\u7684\u89c4\u8303\uff0c\u5b83\u4f7f\u7528\u6807\u7b7e\u6765\u5206\u7ec4Pod\uff0c\u5e76\u5728\u8be5\u7ec4Pod\u4e4b\u4e0a\u5b9a\u4e49\u89c4\u5219\u6765\u7ba1\u63a7\u5176\u6d41\u91cf\uff0c\u4ece\u800c\u4e3aKubernetes\u63d0\u4f9b\u66f4\u4e3a\u7cbe\u7ec6\u7684\u6d41\u91cf\u63a7\u5236\u4ee5\u53ca\u79df\u6237\u9694\u79bb\u673a\u5236<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kubernetes\u81ea\u8eab\u4ec5\u5b9e\u73b0\u4e86NetworkPolicy API\u7684\u89c4\u8303\uff0c\u5177\u4f53\u7684\u7b56\u7565\u5b9e\u65bd\u8981\u9760CNI\u7f51\u7edc\u63d2\u4ef6\u5b8c\u6210\uff0c\u4f8b\u5982\uff0cCalico\u3001Antrea\u3001Canal\u548cWeave\u7b49\uff0cFlannel\u4e0d\u652f\u6301\u7f51\u7edc\u7b56\u7565\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Calico\u7684calico-kube-controllers\u662f\u8be5\u9879\u76ee\u4e2d\u7528\u4e8e\u5c06\u7528\u6237\u5b9a\u4e49\u7684\u7f51\u7edc\u7b56\u7565\u4e88\u4ee5\u5b9e\u73b0\u7684\u7ec4\u4ef6\uff0c\u5b83\u4e3b\u8981\u4f9d\u8d56\u4e8e\u5728\u8282\u70b9\u4e0a\u6784\u5efaiptables\u89c4\u5219\u5b9e\u73b0\u8bbf\u95ee\u63a7\u5236\u529f\u80fd\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0ckubernetes\u6ca1\u6709\u5bf9pod\u505a\u4efb\u4f55\u9694\u79bb\u9650\u5236<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NetworkPolicy\u662f\u540d\u79f0\u7a7a\u95f4\u7ea7\u522b\u7684\u8d44\u6e90\uff0c\u5141\u8bb8\u7528\u6237\u4f7f\u7528\u6807\u7b7e\u9009\u62e9\u5668\u5728\u7b5b\u9009\u51fa\u7684\u4e00\u7ec4Pod\u5bf9\u8c61\u4e0a\u5206\u522b\u7ba1\u7406Ingress\u548cEgress\u6d41\u91cf\uff0c\u4e00\u65e6\u5c06Network Policy\u5f15\u5165\u5230\u540d\u79f0\u7a7a\u95f4\u4e2d\uff0c\u5219\u88ab\u6807\u7b7e\u9009\u62e9\u5668\u201c\u9009\u4e2d\u201d\u7684Pod\u5c06\u9ed8\u8ba4\u62d2\u7edd\u6240\u6709\u6d41\u91cf\uff0c\u800c\u4ec5\u653e\u884c\u7531\u7279\u5b9a\u7684NetworlPolicy\u8d44\u6e90\u660e\u786e\u201c\u5141\u8bb8\u201d\u7684\u6d41\u91cf\uff0c\u672a\u88ab\u4efb\u4f55NetworkPolicy\u8d44\u6e90\u7684\u6807\u7b7e\u9009\u62e9\u5668\u9009\u4e2d\u7684Pod\u5bf9\u8c61\u7684\u6d41\u91cf\u5219\u4e0d\u53d7\u5f71\u54cd\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b98\u65b9\u63d0\u4f9b\u7684\u6a21\u677f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>apiVersion: networking.k8s.io\/v1\nkind: NetworkPolicy\nmetadata:\n  name: test-network-policy\n  namespace: default\nspec:\n  podSelector:                   #\u8be5\u7b56\u7565\u9002\u7528\u4e8e\u7684pod\u4e3a\u9ed8\u8ba4\u547d\u540d\u7a7a\u95f4\u4e0b\u6807\u7b7e\u4e3arole:db\u7684pod\n    matchLabels:                 #\u5982\u679c\u4e3apodSelector{}\u8868\u793a\u8be5\u7b56\u7565\u4f5c\u7528\u4e8e\u6b64\u547d\u540d\u7a7a\u95f4\u4e0b\u7684\u6240\u6709pod\n      role: db\n  policyTypes:                   #\u8bbe\u7f6e\u7b56\u7565\u7c7b\u578b\uff0c\u6709\u5165\u6808(Ingress)\u548c\u51fa\u6808(Egress)\u7c7b\u578b\uff0c\u5982\u679c\u4e0d\u8bbe\u7f6e\u9ed8\u8ba4\u4e3a\u5165\u6808(Ingress)\n    - Ingress\n    - Egress\n  ingress:                       #\u914d\u7f6e\u5165\u6808\u89c4\u5219\uff0c\u901a\u8fc7from\n    - from:\n        - ipBlock:               #IP\u89c4\u5219\n            cidr: 172.17.0.0\/16\n            except:\n              - 172.17.1.0\/24\n        - namespaceSelector:     #\u547d\u540d\u7a7a\u95f4\u89c4\u5219\n            matchLabels:\n              project: myproject\n        - podSelector:           #Pod\u89c4\u5219\n            matchLabels:\n              role: frontend\n      ports:\n        - protocol: TCP\n          port: 6379\n  egress:                        #\u51fa\u6808\u89c4\u5219\uff0c\u901a\u8fc7to\n    - to:\n        - ipBlock:\n            cidr: 10.0.0.0\/24\n      ports:\n        - protocol: TCP\n          port: 5978<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8ff0\u7f51\u7edc\u7b56\u7565\u8bf4\u660e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6b64\u7b56\u7565\u4f5c\u7528\u4e8e\u9ed8\u8ba4\u547d\u540d\u7a7a\u95f4\u4e2d\u6807\u7b7e\u4e3arole:db\u7684pod<\/li>\n\n\n\n<li>\u5165\u7ad9\u89c4\u5219\u5141\u8bb8IP\u5730\u5740\u9664\u4e86172.17.1.0\/24 \u4e4b\u5916\u7684\u6240\u6709172.17.0.0\/16\u6bb5\u3001\u6807\u7b7e\u4e3aproject:myproject\u7684\u547d\u540d\u7a7a\u95f4\u3001\u9ed8\u8ba4\u547d\u540d\u7a7a\u95f4\u4e0b\u6807\u7b7e\u4e3arole:frontend\u7684pod\u8bbf\u95ee\u6807\u7b7e\u4e3arole:db\u7684pod\u7684TCP  6379\u7aef\u53e3<\/li>\n\n\n\n<li>\u51fa\u7ad9\u89c4\u5219\u5141\u8bb8\u9ed8\u8ba4\u547d\u540d\u7a7a\u95f4\u4e2d\u6807\u7b7e\u4e3arole:db\u7684pod\u8bbf\u95ee10.0.0.0\/24\u7684TCP 5978\u7aef\u53e3<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">1\u3001\u5728default\u547d\u540d\u7a7a\u95f4\u4e2d\u62d2\u7edd\u6240\u6709\u5165\u7ad9\u6d41\u91cf\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>apiVersion: networking.k8s.io\/v1\nkind: NetworkPolicy\nmetadata:\n  name: default-deny-ingress\nspec:\n  podSelector: {}        #\u8868\u793a\u9488\u5bf9\u9ed8\u8ba4\u547d\u540d\u7a7a\u95f4\u4e0b\u7684\u6240\u6709pod\n  policyTypes:\n  - Ingress              #\u672a\u914d\u7f6eingress\uff0c\u8868\u793a\u62d2\u7edd\u6240\u6709<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">2\u3001\u5141\u8bb8\u6240\u6709\u5165\u7ad9\u6d41\u91cf\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>apiVersion: networking.k8s.io\/v1\nkind: NetworkPolicy\nmetadata:\n  name: allow-all-ingress\nspec:\n  podSelector: {}        #\u8868\u793a\u9488\u5bf9\u9ed8\u8ba4\u547d\u540d\u7a7a\u95f4\u4e0b\u7684\u6240\u6709pod\n  ingress:               #\u914d\u7f6e\u4e86ingress{}\uff0c\u8868\u793a\u5141\u8bb8\u6240\u6709\n  - {}\n  policyTypes:\n  - Ingress<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">3\u3001\u9ed8\u8ba4\u62d2\u7edd\u6240\u6709\u51fa\u7ad9\u6d41\u91cf\uff0c\u5bf9\u5165\u7ad9\u6ca1\u6709\u5f71\u54cd\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>apiVersion: networking.k8s.io\/v1\nkind: NetworkPolicy\nmetadata:\n  name: default-deny-egress\nspec:\n  podSelector: {}\n  policyTypes:\n  - Egress<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">4\u3001\u5141\u8bb8\u6240\u6709\u51fa\u7ad9\u6d41\u91cf\uff0c\u5bf9\u5165\u7ad9\u6ca1\u6709\u5f71\u54cd\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>apiVersion: networking.k8s.io\/v1\nkind: NetworkPolicy\nmetadata:\n  name: allow-all-egress\nspec:\n  podSelector: {}\n  egress:\n  - {}\n  policyTypes:\n  - Egress<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">5\u3001\u9ed8\u8ba4\u62d2\u7edd\u6240\u6709\u5165\u7ad9\u548c\u6240\u6709\u51fa\u7ad9\u6d41\u91cf\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>apiVersion: networking.k8s.io\/v1\nkind: NetworkPolicy\nmetadata:\n  name: default-deny-all\nspec:\n  podSelector: {}\n  policyTypes:\n  - Ingress\n  - Egress<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u662f\u4e00\u9053cks\u8003\u8bd5\u771f\u9898\uff0c\u5173\u4e8e\u7f51\u7edc\u7b56\u7565\u7684<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u521b\u5efa\u4e00\u4e2a\u540d\u4e3apod-restriction&nbsp;\u7684NetworkPolicy\u6765\u9650\u5236\u5bf9\u5728namespace&nbsp;dev-team\u4e2d\u8fd0\u884c\u7684Pod&nbsp;products-service\u7684\u8bbf\u95ee\uff0c\u53ea\u5141\u8bb8\u4ee5\u4e0b\u7684pod\u8fde\u63a5\u5230products-service\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>namespace&nbsp;qa\u4e2d\u7684Pod<\/li>\n\n\n\n<li>\u4f4d\u4e8e\u4efb\u4f55namespace\uff0c\u5e26\u6709\u6807\u7b7eenvironment: testing\u7684Pod<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u7f51\u7edc\u7b56\u7565pod-restriction\u7684\u6e05\u5355\u6587\u4ef6\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>apiVersion: networking.k8s.io\/v1\nkind: NetworkPolicy\nmetadata:\n  name: pod-restriction\n  namespace: dev-team\nspec:\n  podSelector:\n    matchLabels:\n      app: products                 #\u6839\u636e\u6807\u7b7e\u5339\u914d\uff0c\u53ef\u81ea\u5b9a\u4e49\u6253\u6807\u7b7e\n  policyTypes:\n    - Ingress\n  ingress:\n    - from:                         #\u7b2c\u4e00\u4e2afrom\n        - namespaceSelector:\n            matchLabels:\n              app: qa               #\u7ed9\u547d\u540d\u7a7a\u95f4qa\u6253\u4e0a\u6807\u7b7e\uff0c\u53ef\u81ea\u5b9a\u4e49\u6807\u7b7e\u540d\n    - from:\n        - namespaceSelector: {}     #\u8868\u793a\u6765\u81ea\u6240\u6709\u7684\u547d\u540d\u7a7a\u95f4\n          podSelector:\n            matchLabels:\n              environment: testing  #\u4efb\u4f55\u547d\u540d\u7a7a\u95f4\u4e2d\u5e26\u6709\u6b64\u6807\u7b7e\u7684pod\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u7f51\u7edc\u7b56\u7565\u662f\u63a7\u5236Pod\u8d44\u6e90\u7ec4\u95f4\u4ee5\u53ca\u4e0e\u5176\u4ed6\u7f51\u7edc\u7aef\u70b9\u95f4\u5982\u4f55\u8fdb\u884c\u901a\u4fe1\u7684\u89c4\u8303\uff0c\u5b83\u4f7f\u7528\u6807\u7b7e\u6765\u5206\u7ec4Pod\uff0c\u5e76\u5728\u8be5\u7ec4Pod\u4e4b\u4e0a [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":9154,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[93,23],"tags":[],"class_list":["post-9143","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kubernetes","category-rong"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":8}},"_links":{"self":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/9143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/comments?post=9143"}],"version-history":[{"count":22,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/9143\/revisions"}],"predecessor-version":[{"id":12894,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/9143\/revisions\/12894"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/media\/9154"}],"wp:attachment":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/media?parent=9143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/categories?post=9143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/tags?post=9143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}