{"id":1225,"date":"2019-05-07T02:28:26","date_gmt":"2019-05-07T02:28:26","guid":{"rendered":"http:\/\/www.ipcpu.com\/?p=1225"},"modified":"2019-11-11T08:01:43","modified_gmt":"2019-11-11T08:01:43","slug":"docker-k8s-etc-hosts","status":"publish","type":"post","link":"https:\/\/c.ipcpu.com\/2019\/05\/docker-k8s-etc-hosts\/","title":{"rendered":"\u5982\u4f55\u5728docker\u5bb9\u5668\u3001Kubernetes\u7684Pod\u4e2d\u6dfb\u52a0\/etc\/hosts\u914d\u7f6e"},"content":{"rendered":"<p>\u5982\u4f55\u5728docker\u5bb9\u5668\u3001Kubernetes\u7684Pod\u4e2d\u6dfb\u52a0\/etc\/hosts\u914d\u7f6e.md<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-1223\" src=\"\/\/www.ipcpu.com\/wp-content\/uploads\/2019\/06\/a262a1418bfde41d9fed1229ae1f103c_aece151a-ac66-4c5c-b2bf-73f1a12bd251.jpg\" alt=\"\" width=\"251\" height=\"124\" \/><\/p>\n<h2 id=\"\u4e00\u3001\u6982\u8ff0\">\u4e00\u3001\u6982\u8ff0<\/h2>\n<p>\u5728\u5b9e\u9645\u4e1a\u52a1\u573a\u666f\u4e2d\uff0c\u7ecf\u5e38\u4f1a\u51fa\u73b0\u9700\u8981\u914d\u7f6e\/etc\/hosts \u5185\u5bb9\u7684\u60c5\u51b5\uff0c\u5373\u4f7f\u73b0\u5728\u5411docker\u548ck8s\u65b9\u5411\u8f6c\u53d8\uff0c\u4ecd\u7136\u662f\u5b58\u5728\u5c0f\u90e8\u5206\u8fd9\u6837\u7684\u9700\u6c42\u7684\u3002\u5047\u5982\u5165\u5185\u7f51\u91cc\u9762\u6709\u4e13\u7528\u7684\u5185\u90e8DNS\u670d\u52a1\u5668\u7684\u8bdd\uff0c\u914d\u7f6e\u5230\u5185\u7f51DNS\u670d\u52a1\u5668\u624d\u662f\u6700\u597d\u7684\u9009\u62e9\uff0c\u5982\u679c\u771f\u6ca1\u6709\uff0c\u90a3\u4e48\u8fd9\u5c31\u544a\u8bc9\u4f60\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u5982\u4f55\u914d\u7f6e\/etc\/hosts\u3002<\/p>\n<h2 id=\"\u4e8c\u3001\u76f4\u63a5dockerrun\u7684\u5bb9\u5668\">\u4e8c\u3001\u76f4\u63a5docker run\u7684\u5bb9\u5668<\/h2>\n<p>\u76f4\u63a5docker run\u7684\u5bb9\u5668\uff0c\u53ef\u4ee5\u901a\u8fc7docker run\u7684\u65f6\u5019\u6307\u5b9a--add-host\u53c2\u6570\uff0c\u5c31\u53ef\u4ee5\u5b9e\u73b0\uff0c\u5982\u4e0b<\/p>\n<div>\n<pre><code>docker run -itd --add-host www.baidu.com:202.102.1.1 centos:7<\/code><\/pre>\n<\/div>\n<p>\u8fdb\u5165\u5bb9\u5668\u540e\u53ef\u4ee5\u770b\u5230\/etc\/hosts\u5185\u5bb9<\/p>\n<div>\n<pre><code>[root@iZ2zegjjeracuigce27w49Z ~]# docker exec -it d9fe \/bin\/bash\r\n[root@d9fe9a36af37 \/]# cat \/etc\/hosts\r\n127.0.0.1   localhost\r\n::1 localhost ip6-localhost ip6-loopback\r\nfe00::0 ip6-localnet\r\nff00::0 ip6-mcastprefix\r\nff02::1 ip6-allnodes\r\nff02::2 ip6-allrouters\r\n202.102.1.1 www.baidu.com\r\n169.254.123.2   d9fe9a36af37\r\n[root@d9fe9a36af37 \/]# <\/code><\/pre>\n<\/div>\n<h2 id=\"\u4e09\u3001\u4f7f\u7528docker-compose\u7f16\u6392\">\u4e09\u3001\u4f7f\u7528docker-compose\u7f16\u6392<\/h2>\n<p>\u4f7f\u7528docker-compose\u65f6\uff0c\u6dfb\u52a0\u5982\u4e0b\u53c2\u6570\u5c31\u53ef\u4ee5\u5b9e\u73b0<br \/>\n\u9700\u8981\u6ce8\u610f\u4e0b\u6587\u4ef6\u683c\u5f0f\u7684\u7248\u672c\uff0c\u76ee\u524d2\u7248\u672c\u517c\u5bb9\u6027\u6700\u597d<\/p>\n<div>\n<pre><code>extra_hosts:\r\n - \"somehost:162.242.195.82\"\r\n - \"otherhost:50.31.209.229\"<\/code><\/pre>\n<\/div>\n<h2 id=\"\u56db\u3001Kubernetes\">\u56db\u3001Kubernetes<\/h2>\n<p>Kubernetes\u5728\u5b98\u65b9\u6587\u6863\u4e2d\u7ed9\u51fa\u4e86\u5982\u4f55\u7ed9Pod\u8bbe\u7f6e\/etc\/hosts\u6761\u76ee\u7684\u65b9\u6cd5\uff0c\u4f46\u662f\u6211\u4eec\u4e00\u822c\u662f\u7528deployment\u6765\u90e8\u7f72\u5e94\u7528\u7684\uff0c\u9700\u8981\u6309\u7167\u5982\u4e0b\u7684\u65b9\u6cd5\u914d\u7f6e<\/p>\n<div>\n<pre><code>---\r\nkind: Deployment\r\napiVersion: extensions\/v1beta1\r\nmetadata:\r\n  name: stilton\r\n  labels:\r\n    app: cheese\r\nspec:\r\n  replicas: 2\r\n  selector:\r\n    matchLabels:\r\n      app: cheese\r\n  template:\r\n    metadata:\r\n      labels:\r\n        app: cheese\r\n    spec:\r\n      containers:\r\n      - name: cheese\r\n        image: errm\/cheese:stilton\r\n        ports:\r\n        - containerPort: 80\r\n      hostAliases:\r\n        - ip: 127.0.0.1\r\n          hostnames:\r\n          - myadded.examplehostname<\/code><\/pre>\n<\/div>\n<p>\u6ce8\u610fhostAliases\u8fd9\u4e00\u884c\u548ccontainers\u4ee5\u53carestartPolicy\u662f\u540c\u4e00\u7ea7\u7684\uff0cjson\u683c\u5f0f\u5982\u4e0b<\/p>\n<div>\n<pre><code>        \"restartPolicy\": \"Always\",\r\n        \"terminationGracePeriodSeconds\": 30,\r\n        \"dnsPolicy\": \"ClusterFirst\",\r\n        \"hostAliases\": [\r\n          {\r\n            \"ip\": \"127.0.0.1\",\r\n            \"hostnames\": [\r\n              \"myadded.examplehostname\"\r\n            ]\r\n          }\r\n        ]<\/code><\/pre>\n<\/div>\n<p>\u767b\u9646\u5230pod\u91cc\u9762\u53ef\u4ee5\u770b\u5230\u6dfb\u52a0\u7684\u5185\u5bb9<\/p>\n<div>\n<pre><code> # cat \/etc\/hosts \r\n# Kubernetes-managed hosts file.\r\n127.0.0.1 localhost\r\n::1 localhost ip6-localhost ip6-loopback\r\nfe00::0 ip6-localnet\r\nfe00::0 ip6-mcastprefix\r\nfe00::1 ip6-allnodes\r\nfe00::2 ip6-allrouters\r\n10.210.1.138 micro-ipsvr-web-5b855cc4d6-wz24x\r\n\r\n# Entries added by HostAliases.\r\n127.0.0.1 myadded.examplehostname<\/code><\/pre>\n<\/div>\n<p>\u6216\u8bb8\u4f1a\u6709\u4eba\u60f3\uff1a\u53ef\u4e0d\u53ef\u4ee5\u76f4\u63a5\u628a\u8fd9\u4e9b\u57df\u540d\u6620\u5c04\u5173\u7cfb\u914d\u7f6e\u5230kube-dns(coredns)\u91cc\u9762\uff0c\u8fd9\u6837\u6240\u6709\u7684Pod\u90fd\u53ef\u4ee5\u540c\u6b65kube-dns\u83b7\u53d6\u5230\u4e86\uff1f<br \/>\n\u7ffb\u9605\u4e86\u4e00\u4e0b\u76f8\u5173\u7684\u6587\u6863\uff0c\u76ee\u524d\u8fd8\u662f\u5b9e\u73b0\u4e0d\u4e86\u7684\u3002<\/p>\n<h2 id=\"\u53c2\u8003\u8d44\u6599\">\u53c2\u8003\u8d44\u6599<\/h2>\n<p><a href=\"https:\/\/docs.docker.com\/compose\/compose-file\/compose-file-v2\/\">https:\/\/docs.docker.com\/compose\/compose-file\/compose-file-v2\/<\/a><br \/>\n<a href=\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/services-networking\/add-entries-to-pod-etc-hosts-with-host-aliases\/\">https:\/\/kubernetes.io\/zh\/docs\/concepts\/services-networking\/add-entries-to-pod-etc-hosts-with-host-aliases\/<\/a><\/p>\n<p>&nbsp;<\/p>\n<div id=\"wiz-table-col-line\" style=\"display: none;\"><\/div>\n<div id=\"wiz-table-row-line\" style=\"display: none;\"><\/div>\n<div id=\"wiz-table-range-border_start\" style=\"display: none;\">\n<div id=\"wiz-table-range-border_start_top\"><\/div>\n<div id=\"wiz-table-range-border_start_right\"><\/div>\n<div id=\"wiz-table-range-border_start_bottom\"><\/div>\n<div id=\"wiz-table-range-border_start_left\"><\/div>\n<div id=\"wiz-table-range-border_start_dot\"><\/div>\n<\/div>\n<div id=\"wiz-table-range-border_range\" style=\"display: none;\">\n<div id=\"wiz-table-range-border_range_top\"><\/div>\n<div id=\"wiz-table-range-border_range_right\"><\/div>\n<div id=\"wiz-table-range-border_range_bottom\"><\/div>\n<div id=\"wiz-table-range-border_range_left\"><\/div>\n<div id=\"wiz-table-range-border_range_dot\"><\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<p>\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1a<a href=\"https:\/\/c.ipcpu.com\">IPCPU-\u7f51\u7edc\u4e4b\u8def<\/a> &raquo; <a href=\"https:\/\/c.ipcpu.com\/2019\/05\/docker-k8s-etc-hosts\/\">\u5982\u4f55\u5728docker\u5bb9\u5668\u3001Kubernetes\u7684Pod\u4e2d\u6dfb\u52a0\/etc\/hosts\u914d\u7f6e<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u5728docker\u5bb9\u5668\u3001Kubernetes\u7684Pod\u4e2d\u6dfb\u52a0\/etc\/hosts\u914d\u7f6e.md \u4e00\u3001\u6982\u8ff0 \u5728\u5b9e\u9645\u4e1a\u52a1\u573a\u666f\u4e2d\uff0c\u7ecf\u5e38\u4f1a\u51fa\u73b0\u9700\u8981\u914d\u7f6e\/etc\/hosts \u5185\u5bb9\u7684\u60c5\u51b5\uff0c\u5373\u4f7f\u73b0\u5728\u5411docker\u548ck8s\u65b9\u5411\u8f6c\u53d8\uff0c\u4ecd\u7136\u662f\u5b58\u5728\u5c0f\u90e8\u5206\u8fd9\u6837\u7684\u9700\u6c42\u7684\u3002\u5047\u5982\u5165\u5185\u7f51\u91cc\u9762\u6709\u4e13\u7528\u7684\u5185\u90e8DNS\u670d\u52a1\u5668\u7684\u8bdd\uff0c\u914d\u7f6e\u5230\u5185\u7f51DNS\u670d\u52a1\u5668\u624d\u662f\u6700\u597d\u7684\u9009\u62e9\uff0c\u5982\u679c\u771f\u6ca1\u6709\uff0c\u90a3\u4e48\u8fd9\u5c31\u544a\u8bc9\u4f60\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u5982\u4f55\u914d\u7f6e\/etc\/hosts\u3002 \u4e8c\u3001\u76f4\u63a5docker run\u7684\u5bb9\u5668 \u76f4\u63a5docker run\u7684\u5bb9\u5668\uff0c\u53ef\u4ee5\u901a\u8fc7docker run\u7684\u65f6\u5019\u6307\u5b9a&#8211;add-host\u53c2\u6570\uff0c\u5c31\u53ef\u4ee5\u5b9e\u73b0\uff0c\u5982\u4e0b docker run -itd &#8211;add-host www.baidu.com:202.102.1.1 centos:7 \u8fdb\u5165\u5bb9\u5668\u540e\u53ef\u4ee5\u770b\u5230\/etc\/hosts\u5185\u5bb9 [root@iZ2zegjjeracuigce27w49Z ~]# docker exec -it d9fe \/bin\/bash [root@d9fe9a36af37 \/]# cat \/etc\/hosts 127.0.0.1 localhost ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters 202.102.1.1 www.baidu.com 169.254.123.2 d9fe9a36af37 [root@d9fe9a36af37 \/]# \u4e09\u3001\u4f7f\u7528docker-compose\u7f16\u6392 \u4f7f\u7528docker-compose\u65f6\uff0c\u6dfb\u52a0\u5982\u4e0b\u53c2\u6570\u5c31\u53ef\u4ee5\u5b9e\u73b0 \u9700\u8981\u6ce8\u610f\u4e0b\u6587\u4ef6\u683c\u5f0f\u7684\u7248\u672c\uff0c\u76ee\u524d2\u7248\u672c\u517c\u5bb9\u6027\u6700\u597d extra_hosts: &#8211; &#8220;somehost:162.242.195.82&#8221; &#8211; &#8220;otherhost:50.31.209.229&#8221; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[13],"tags":[68,129],"_links":{"self":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts\/1225"}],"collection":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/comments?post=1225"}],"version-history":[{"count":3,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts\/1225\/revisions"}],"predecessor-version":[{"id":1261,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts\/1225\/revisions\/1261"}],"wp:attachment":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/media?parent=1225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/categories?post=1225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/tags?post=1225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}