{"id":1491,"date":"2018-07-22T15:04:24","date_gmt":"2018-07-22T07:04:24","guid":{"rendered":"https:\/\/chaifeng.com\/?p=1491"},"modified":"2018-07-22T18:07:26","modified_gmt":"2018-07-22T10:07:26","slug":"refactor-shell-check-java-version","status":"publish","type":"post","link":"https:\/\/chaifeng.com\/refactor-shell-check-java-version\/","title":{"rendered":"\u4e00\u4e2a\u5178\u578b\u7684 Shell \u811a\u672c\u7684\u8be6\u7ec6\u8bb2\u89e3\u548c\u91cd\u6784"},"content":{"rendered":"<div id=\"doc\" class=\"markdown-body container-fluid\">\n<h1 id=\"\u4e00\u4e2a\u5178\u578b\u7684-Shell-\u811a\u672c\u7684\u8be6\u7ec6\u8bb2\u89e3\u548c\u91cd\u6784\">\u4e00\u4e2a\u5178\u578b\u7684 Shell \u811a\u672c\u7684\u8be6\u7ec6\u8bb2\u89e3\u548c\u91cd\u6784<\/h1>\n<p>\u4e0a\u5468\u65e0\u610f\u4e2d\u770b\u5230\u4e86\u4e00\u4e2a Shell \u811a\u672c\uff0c\u662f\u4e00\u4e2a\u5f88\u5178\u578b\u7684\u5f00\u53d1\u5de5\u7a0b\u5e08\u601d\u7ef4\u7684\u811a\u672c\u3002\u6211\u5c06\u4f1a\u5148\u5206\u6b65\u8bb2\u89e3\u4e00\u4e0b\u8fd9\u4e2a\u770b\u4e0a\u53bb\u5f88\u7b80\u5355\u7684\u811a\u672c\uff0c\u968f\u540e\u518d\u770b\u5982\u4f55\u91cd\u6784\u3002<\/p>\n<p>\u811a\u672c\u7684\u5b8c\u6574\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre class=\"brush: bash; gutter: true\">PACKAGE=&quot;\\&quot;$1\\&quot;&quot;\r\n\r\nline=$(java -version 2&gt;&amp;1  | grep $PACKAGE | grep -iv openjdk | wc -l)\r\n#echo $line\r\n\r\nif [[ $line =~ 0 ]]; then\r\n  echo &#039;{ &quot;found&quot;: false , &quot;not_found&quot;: true  }&#039;\r\n\r\nelse\r\n  echo &#039;{ &quot;found&quot;: true  , &quot;not_found&quot;: false }&#039;\r\n\r\nfi\r\n<\/pre>\n<p><strong>TL;DR \u8b66\u544a\uff1a\u5982\u679c\u592a\u957f\u4e0d\u60f3\u770b\uff0c\u5c31\u7ffb\u5230\u6700\u540e\u770b\u91cd\u6784\u7ed3\u679c\u3002<\/strong><\/p>\n<h2 id=\"\u811a\u672c\u7684\u8be6\u7ec6\u8bb2\u89e3\">\u811a\u672c\u7684\u8be6\u7ec6\u8bb2\u89e3<\/h2>\n<p>\u8fd9\u6bb5\u811a\u672c\u7684\u9700\u6c42\u5c31\u662f\u5224\u65ad\u662f\u5426\u5df2\u7ecf\u5b89\u88c5\u4e86\u7279\u5b9a\u7248\u672c\u7684 Oracle JDK\u3002\u5728\u8c03\u7528\u7684\u65f6\u5019\u4f1a\u4f20\u5165 Java \u7684\u7248\u672c\u53f7\u7801\uff0c\u6bd4\u5982\uff1a<code>1.8.0_161<\/code>\uff0c\u8fd9\u5c31\u662f <code>$1<\/code> \u7684\u503c\u3002<\/p>\n<p>\u9996\u5148\u5b9a\u4e49\u4e86 PACKAGE \u8fd9\u4e2a\u53d8\u91cf\uff0c\u4e3a\u4ec0\u4e48\u5728\u628a <code>$1<\/code> \u8d4b\u503c\u7ed9 <code>PACKAGE<\/code> \u7684\u65f6\u5019\u8981\u8f6c\u4e49\u53cc\u5f15\u53f7\u5462\uff1f\u662f\u56e0\u4e3a <code>java -version<\/code> \u8fd9\u4e2a\u547d\u4ee4\u8f93\u51fa\u7684\u65f6\u5019\uff0c\u7248\u672c\u53f7\u7801\u662f\u6709\u53cc\u5f15\u53f7\u7684\u3002\u6240\u4ee5\u5b9a\u4e49\u8fd9\u4e2a <code>PACKAGE<\/code>\u00a0\u7684\u4f5c\u7528\u662f\u8981\u7cbe\u51c6\u5339\u914d java \u7684\u7248\u672c\u3002<\/p>\n<pre class=\"brush: bash; gutter: true\"># Oracle JDK\r\nchaifeng@local ~ $ java -version\r\njava version &quot;1.8.0_161&quot;\r\nJava(TM) SE Runtime Environment (build 1.8.0_161-b12)\r\nJava HotSpot(TM) 64-Bit Server VM (build 25.161-b12, mixed mode)\r\n\r\n# OpenJDK\r\nchaifeng@local ~ $ java -version\r\nopenjdk version &quot;1.8.0_144&quot;\r\nOpenJDK Runtime Environment (Zulu 8.23.0.3-macosx) (build 1.8.0_144-b01)\r\nOpenJDK 64-Bit Server VM (Zulu 8.23.0.3-macosx) (build 25.144-b01, mixed mode)\r\n<\/pre>\n<p>\u7136\u540e\u5c31\u5f00\u59cb\u6267\u884c\u5224\u65ad\uff0c\u5e76\u628a\u7ed3\u679c\u8d4b\u503c\u7ed9\u53d8\u91cf <code>line<\/code>\u3002\u8fd9\u884c\u811a\u672c\u770b\u4e0a\u53bb\u505a\u4e86\u5f88\u591a\u7684\u4e8b\u60c5\uff0c\u6211\u4eec\u6765\u62c6\u5f00\u770b\u4e00\u4e0b\u3002<\/p>\n<p><code>java -version<\/code> \u7528\u6765\u8f93\u51fa\u7248\u672c\u53f7\uff0c\u4f46\u662f\u8f93\u51fa\u5230\u4e86\u6807\u51c6\u9519\u8bef\u4e0a\u3002\u800c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6807\u51c6\u9519\u8bef\u662f\u65e0\u6cd5\u901a\u8fc7\u7ba1\u9053\u4f20\u9012\u7ed9\u4e0b\u4e00\u4e2a\u547d\u4ee4\u7684\u3002\u6240\u4ee5\u9700\u8981 <code>2&gt;&amp;1<\/code> \u6765\u628a\u6807\u51c6\u9519\u8bef\u7684\u5185\u5bb9\u91cd\u5b9a\u5411\u5230\u6807\u51c6\u8f93\u51fa\uff0c\u8fd9\u6837\u624d\u53ef\u4ee5\u628a java \u7684\u7248\u672c\u53f7\u7801\u4f20\u9012\u7ed9 <code>grep<\/code> \u547d\u4ee4\uff0c\u5426\u5219 <code>grep<\/code> \u662f\u65e0\u8bba\u5982\u4f55\u90fd\u65e0\u6cd5\u83b7\u53d6\u5230 <code>java -version<\/code>\u00a0\u7684\u8f93\u51fa\u7684\u3002<\/p>\n<p>\u7b2c\u4e00\u4e2a grep \u547d\u4ee4\u7528\u6765\u8fc7\u6ee4 <code>java -version<\/code> \u8f93\u51fa\u4e2d\u5305\u542b\u7248\u672c\u53f7\u7684\u6240\u6709\u884c\uff0c\u5e76\u4e14\u8fd9\u4e2a\u7248\u672c\u53f7\u662f\u7528\u53cc\u5f15\u53f7\u5305\u542b\u8d77\u6765\u7684\u3002\u6b63\u5e38\u60c5\u51b5\u4e0b\u5c06\u4f1a\u5f97\u5230 <code>java -version<\/code> \u547d\u4ee4\u8f93\u51fa\u7684\u7b2c\u4e00\u884c\u3002<\/p>\n<p>\u7136\u540e\u518d\u628a\u7ed3\u679c\u4f20\u9012\u7ed9 <code>grep -iv openjdk<\/code> \u547d\u4ee4\u3002<code>grep<\/code> \u7684 <code>-i<\/code> \u9009\u9879\u662f\u5339\u914d\u65f6\u5ffd\u7565\u5927\u5c0f\u5199\u3002<code>-v<\/code> \u9009\u9879\u662f\u6392\u9664\uff0c\u4e5f\u5c31\u662f\u53cd\u5411\u5339\u914d\uff0c\u5c06\u4f1a\u8f93\u51fa\u4e0d\u5339\u914d\u7684\u6240\u6709\u884c\u3002\u5982\u679c\u7cfb\u7edf\u4e2d\u6b63\u5728\u4f7f\u7528\u7684\u662f OpenJDK\uff0c\u524d\u4e00\u4e2a <code>grep<\/code> \u547d\u4ee4\u53ea\u662f\u5224\u65ad\u662f\u5426\u662f\u6307\u5b9a\u7248\u672c\u7684 JDK\uff0c\u5305\u62ec Oracle JDK \u548c OpenJDK\u3002\u8fd9\u4e2a <code>grep<\/code> \u547d\u4ee4\u5c06\u6392\u9664 OpenJDK \u7684\u8f93\u51fa\uff0c\u6240\u4ee5\u5982\u679c\u5f53\u524d\u7cfb\u7edf\u4e2d\u4f7f\u7528\u7684\u662f OpenJDK\uff0c\u8fd9\u4e2a\u547d\u4ee4\u6267\u884c\u4e4b\u540e\u53ef\u80fd\u4f1a\u5f97\u5230\u7a7a\u7684\u7ed3\u679c\u3002<\/p>\n<p>\u6700\u540e\u518d\u7528 <code>wc -l<\/code> \u547d\u4ee4\u6765\u5f97\u5230\u7ed3\u679c\u7684\u884c\u6570\u3002\u5982\u679c\u662f\u7279\u5b9a\u7248\u672c\u7684 Oracle JDK\uff0c\u90a3\u7ed3\u679c\u5c31\u662f\u4e00\u884c\u3002\u5982\u679c\u4e0d\u662f\u7279\u5b9a\u7248\u672c\u7684 Oracle JDK\uff0c\u6216\u8005\u662f OpenJDK\uff0c\u5c31\u4f1a\u8f93\u51fa\u7a7a\u7684\u7ed3\u679c\uff0c\u6240\u4ee5\u884c\u6570\u5c06\u4f1a\u662f <code>0<\/code>\u3002<\/p>\n<p><code>line<\/code> \u8fd9\u4e2a\u53d8\u91cf\u5c31\u4f1a\u4fdd\u5b58\u6700\u540e\u7ed3\u679c\u7684\u884c\u6570\uff0c\u5982\u679c\u662f <code>0<\/code> \u884c\u663e\u7136\u5c31\u662f\u7cfb\u7edf\u4e2d\u6ca1\u6709\u4f7f\u7528\u7279\u5b9a\u7248\u672c\u7684 Oracle JDK\u3002\u6240\u4ee5\u8fd9\u91cc\u7528\u4e86 <code>[[ $line =~ 0 ]]<\/code> \u6765\u5224\u65ad\u53d8\u91cf <code>line<\/code> \u662f\u5426\u4e3a <code>0<\/code>\u3002<\/p>\n<p>\u4e3a\u4ec0\u4e48\u6700\u540e\u4f1a\u6839\u636e <code>line<\/code> \u662f\u5426\u4e3a <code>0<\/code> \u6765\u8f93\u51fa\u4e00\u4e2a JSON \u7684\u5b57\u7b26\u4e32\u5462\uff1f\u662f\u56e0\u4e3a\u8fd9\u4e2a\u811a\u672c\u5c06\u5728 Ansible Playbook \u4e2d\u8c03\u7528\u3002\u76f8\u5173\u7684 Ansible \u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre class=\"brush: bash; gutter: true\">- name: copy scripts to server\r\n  copy: src=&quot;..\/files\/check-java-version.sh&quot;  dest=&quot;{{ java_download_path }}\/&quot;  mode=&quot;a+x&quot;\r\n\r\n- name: check if specific version of Oracle JDK is installed?\r\n  shell: LC_ALL=&quot;en_US.UTF-8&quot;  {{ java_download_path }}\/check-java-version.sh  &quot;{{ jdk_version }}&quot;\r\n  register: jdk_info\r\n  changed_when: false\r\n  failed_when: jdk_info.rc &gt; 0\r\n\r\n#- debug: var=jdk_info\r\n\r\n- include: install.yml\r\n  when: (jdk_info.stdout|from_json).not_found\r\n<\/pre>\n<p>\u8fd9\u91cc\u67093\u4e2a task\u3002\u7b2c\u4e00\u4e2a task \u662f\u628a\u811a\u672c\u590d\u5236\u5230\u670d\u52a1\u5668\u4e0a\uff0c\u5e76\u8bbe\u7f6e\u4e86\u6267\u884c\u6743\u9650\u3002\u7b2c\u4e8c\u4e2a task \u662f\u6267\u884c\u8fd9\u4e2a\u811a\u672c\uff0c\u5e76\u4e14\u4f20\u5165\u4e86 java \u7684\u7248\u672c\uff0c\u6700\u540e\u628a task \u7684\u6267\u884c\u7ed3\u679c\u4fdd\u5b58\u5230 Ansible \u53d8\u91cf <code>jdk_info<\/code> \u4e2d\u3002<code>jdk_info<\/code> \u7684 <code>stdout<\/code> \u5c31\u5c06\u662f Shell \u811a\u672c\u6700\u540e\u8f93\u51fa\u7684\u90a3\u4e2a JSON \u5b57\u7b26\u4e32\uff0c\u6bd4\u5982\uff1a<code>{ \"found\": false , \"not_found\": true }<\/code>\u3002\u7b2c\u4e09\u4e2a task \u662f\u628a\u7b2c\u4e8c\u4e2a task \u7684\u6267\u884c\u7ed3\u679c\u8f6c\u6362\u4e3a JSON \u5bf9\u8c61\uff0c\u5e76\u5224\u65ad\u8fd9\u4e2a\u5bf9\u8c61\u4e2d\u7684 <code>not_found<\/code> \u7684\u503c\u662f\u5426\u4e3a <code>true<\/code> \u6765\u51b3\u5b9a\u662f\u5426\u52a0\u8f7d <code>install.yml<\/code> \u8fd9\u4e2a\u6587\u4ef6\u3002<\/p>\n<h2 id=\"\u5f00\u59cb\u91cd\u6784\">\u5f00\u59cb\u91cd\u6784<\/h2>\n<p>\u6240\u6709\u76f8\u5173\u7684\u4ee3\u7801\u90fd\u5206\u6790\u5b8c\u4e86\uff0c\u6211\u4eec\u6765\u770b\u770b\u5982\u4f55\u91cd\u6784\uff0c\u4ee5\u53ca\u91cc\u9762\u6709\u54ea\u4e9b\u9700\u8981\u6ce8\u610f\u7684\u95ee\u9898\u3002<\/p>\n<p>\u4e4b\u524d\u4e5f\u7ed9\u51e0\u4f4d\u670b\u53cb\u770b\u8fc7\u8fd9\u4e2a\u811a\u672c\uff0c\u5927\u90e8\u5206\u4eba\u89c9\u5f97\u95ee\u9898\u4e3b\u8981\u5728\u6700\u540e\u7684 <code>if<\/code> \u90a3\u91cc\uff0c\u5c24\u5176\u662f\u8f93\u51fa JSON \u5b57\u7b26\u4e32\u7684\u65f6\u5019\u6709\u4e92\u4e3a\u76f8\u53cd\u7684 <code>found<\/code> \u548c <code>not_found<\/code> \u4e24\u4e2a\u503c\u3002<\/p>\n<p>\u5148\u8bf4\u5178\u578b\u95ee\u9898\uff0c\u9996\u5148\u5c31\u662f\u5728 Bash \u811a\u672c\u4e2d\uff0c\u5982\u679c\u4e0d\u662f\u7279\u522b\u9700\u8981\uff0c\u6240\u6709\u7684\u53d8\u91cf\u4e00\u5b9a\u8981\u52a0\u4e0a\u53cc\u5f15\u53f7\uff01\u6709\u6ca1\u6709\u53cc\u5f15\u53f7\u5728 Bash \u4e2d\u662f\u4e0d\u4e00\u6837\u7684\uff0c\u4e0d\u4ec5\u4ec5\u662f\u53cc\u5f15\u53f7\u91cc\u9762\u53d8\u91cf\u4f1a\u88ab\u66ff\u6362\uff0c\u800c\u5355\u5f15\u53f7\u4e0d\u66ff\u6362\u8fd9\u4e2a\u533a\u522b\u3002<\/p>\n<p>\u5176\u6b21 <code>if<\/code> \u7684\u6761\u4ef6\u5224\u65ad\u7528\u4e86 <code>=~<\/code> \u8fd9\u4e2a\u64cd\u4f5c\u7b26\uff0c\u8fd9\u662f Bash \u4e2d\u7684\u6b63\u5219\u5339\u914d\u7684\u5224\u65ad\u3002\u5224\u65ad\u8bed\u53e5 <code>[[ $line =~ 0 ]]<\/code> \u7684\u542b\u4e49\u662f\u5224\u65ad\u53d8\u91cf <code>line<\/code> \u8fd9\u4e2a\u5b57\u7b26\u4e32\u91cc\u9762\u662f\u5426\u5305\u542b\u5b57\u7b26 <code>0<\/code>\u3002\u6240\u4ee5\u5f53 <code>line<\/code> \u7684\u503c\u4e3a <code>10<\/code>, <code>201<\/code> \u90fd\u53ef\u4ee5\u6210\u529f\u5339\u914d\u7684\uff0c\u8fd9\u91cc\u663e\u7136\u4e0d\u662f\u671f\u671b\u8fd9\u4e48\u5224\u65ad\u7684\u3002\u5f53\u7136\u4e86\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c<code>line<\/code> \u7684\u503c\u8981\u4e48\u662f <code>1<\/code> \u8981\u4e48\u662f <code>0<\/code>\u3002\u6b63\u786e\u7684\u505a\u6cd5\u662f\uff0c\u8fd9\u91cc\u5e94\u8be5\u7528 <code>-eq<\/code> \u64cd\u4f5c\u7b26\u6765\u5224\u65ad <code>line<\/code> \u8fd9\u4e2a\u53d8\u91cf\u662f\u5426\u7b49\u4e8e\u6570\u503c <code>0<\/code>\u3002<\/p>\n<pre class=\"brush: bash; gutter: true\">[[ &quot;$line&quot; -eq 0 ]]\r\n<\/pre>\n<p>\u6700\u540e\u662f\u8fd9\u4e2a <code>if<\/code> \u5224\u65ad\u6709\u6ca1\u6709\u5fc5\u8981\u5462\uff1f<\/p>\n<p>\u901a\u5e38\u6211\u4eec\u5728 Java\u3001Python\u3001C \u7b49\u8bed\u8a00\u91cc\u9762\u51fd\u6570\u7684\u6267\u884c\u7ed3\u679c\u5c31\u662f\u5176\u8fd4\u56de\u503c\u3002\u5728 Shell \u811a\u672c\u4e2d\uff0c\u6bcf\u4e00\u4e2a\u547d\u4ee4\u7684\u6267\u884c\u7ed3\u679c\u5c31\u662f\u5176\u8f93\u51fa\u3002\u6240\u4ee5\uff0c\u5bf9\u4e8e\u521a\u4ece\u5f00\u53d1\u8f6c\u5230\u8fd0\u7ef4\u7684\u5de5\u7a0b\u5e08\u6765\u8bf4\uff0c\u5c31\u4f1a\u4e60\u60ef\u7684\u60f3\u5230\u6839\u636e\u547d\u4ee4\u7684\u8f93\u51fa\u7ed3\u679c\u6765\u5224\u65ad\u3002\u4f46 Shell \u4e2d\u8fd8\u6709\u4e00\u4e2a\u5f88\u5e38\u7528\u7684\u5224\u65ad\u65b9\u6cd5\u5c31\u662f\u6839\u636e\u547d\u4ee4\u7684\u9000\u51fa\u72b6\u6001\u3002\u5982\u679c\u547d\u4ee4\u6267\u884c\u6210\u529f\uff0c\u90a3\u9000\u51fa\u72b6\u6001\u5c31\u662f <code>0<\/code>\uff0c\u5426\u5219\u5c31\u662f\u975e <code>0<\/code>\u3002\u6839\u636e\u9000\u51fa\u72b6\u6001\u7684\u4e0d\u540c\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u77e5\u9053\u547d\u4ee4\u4e3a\u4ec0\u4e48\u4f1a\u6267\u884c\u5931\u8d25\u3002\u5728 Bash \u4e2d\uff0c\u5185\u90e8\u53d8\u91cf <code>$?<\/code> \u4fdd\u5b58\u7684\u5c31\u662f\u524d\u4e00\u4e2a\u547d\u4ee4\u7684\u9000\u51fa\u72b6\u6001\u3002\u5176\u5b9e Shell \u811a\u672c\u91cc\u7684\u9000\u51fa\u72b6\u6001\u4e5f\u53ef\u4ee5\u7c7b\u6bd4\u4e3a\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u4e2d\u7684\u629b\u51fa\u5f02\u5e38\u3002<\/p>\n<p>Shell \u811a\u672c\u7684\u9000\u51fa\u72b6\u6001\u5c31\u662f\u811a\u672c\u91cc\u9762\u6267\u884c\u7684\u6700\u540e\u4e00\u4e2a\u547d\u4ee4\u7684\u9000\u51fa\u72b6\u6001\u3002\u901a\u5e38\u6211\u4eec\u4e0d\u5728\u610f\u547d\u4ee4\u7684\u8f93\u51fa\uff0c\u800c\u53ea\u8981\u6839\u636e\u9000\u51fa\u72b6\u6001\u6765\u5224\u65ad\u6267\u884c\u7ed3\u679c\u5c31\u53ef\u4ee5\u4e86\u3002\u5bf9\u4e8e\u73b0\u5728\u91cd\u6784\u7684\u8fd9\u4e2a\u68c0\u67e5 Java \u7248\u672c\u7684\u811a\u672c\u4e5f\u4e00\u6837\uff0c\u5982\u679c\u9000\u51fa\u72b6\u6001\u662f <code>0<\/code> \u8bf4\u660e\u7cfb\u7edf\u4e2d\u662f\u7279\u5b9a\u7248\u672c\u7684 Oracle JDK\u3002\u5982\u679c\u9000\u51fa\u72b6\u6001\u4e3a\u975e <code>0<\/code> \u8bf4\u660e\u4e0d\u662f\u7279\u5b9a\u7248\u672c\u7684 Oracle JDK \u6216\u8005\u5b89\u88c5\u7684\u662f OpenJDK\u3002<\/p>\n<p>\u5982\u679c\u7528\u9000\u51fa\u72b6\u6001\u6765\u5224\u65ad Java \u7248\u672c\uff0c\u90a3\u5c31\u6ca1\u6709\u5fc5\u8981\u8f93\u51fa JSON \u683c\u5f0f\u7684\u7ed3\u679c\u4e86\u3002<code>if<\/code> \u7684\u90a35\u884c\u4ee3\u7801\u5c31\u53ef\u4ee5\u6362\u6210\u4e00\u884c\uff1a<\/p>\n<pre class=\"brush: bash; gutter: true\">[[ &quot;$line&quot; -eq 1 ]]\r\n<\/pre>\n<p>\u5982\u679c\u662f\u7279\u5b9a\u7248\u672c\u7684 Oracle JDK\uff0c\u90a3\u53d8\u91cf <code>line<\/code> \u7684\u503c\u5c31\u662f <code>1<\/code>\uff0c\u8fd9\u4e2a\u5224\u65ad\u5c31\u4f1a\u6210\u529f\uff0cShell \u7684\u9000\u51fa\u72b6\u6001\u5c31\u5c06\u662f <code>0<\/code>\uff0c\u5426\u5219\u662f <code>1<\/code>\u3002<\/p>\n<p>\u53ef\u4e0d\u53ef\u4ee5\u518d\u7b80\u5355\u4e00\u70b9\u513f\u5462\uff1f\u662f\u7684\uff0c\u8fd4\u56de\u7ed3\u679c\u7684\u884c\u6570\u4e5f\u662f\u6ca1\u5fc5\u8981\u7684\u3002\u5728\u83b7\u53d6\u884c\u6570\u90a3\u884c\u91cc\u9762<\/p>\n<pre class=\"brush: bash; gutter: true\">line=$(java -version 2&gt;&amp;1  | grep $PACKAGE | grep -iv openjdk | wc -l)\r\n<\/pre>\n<p>\u5176\u5b9e <code>java -version 2&gt;&amp;1 | grep $PACKAGE | grep -iv openjdk<\/code> \u5c31\u5df2\u7ecf\u5b8c\u6210\u4e86\u7279\u5b9a Oracle JDK \u7684\u5224\u65ad\u3002\u53ea\u6709\u5f53\u524d\u5c31\u662f\u7279\u5b9a\u7248\u672c\u7684 Oracle JDK \u7684\u65f6\u5019\uff0c\u8fd9\u4e2a\u7ba1\u9053\u547d\u4ee4\u7684\u9000\u51fa\u72b6\u6001\u624d\u662f <code>0<\/code>\uff0c\u5426\u5219\u5c31\u662f <code>1<\/code>\u3002\u90a3\u8fd9\u4e2a\u811a\u672c\u5c31\u53ef\u4ee5\u6539\u5199\u4e3a 1 \u884c\uff1a<\/p>\n<pre class=\"brush: bash; gutter: true\">java -version 2&gt;&amp;1  | grep &quot;\\&quot;$1\\&quot;&quot; | grep -iv openjdk\r\n<\/pre>\n<p>\u65e2\u7136\u6211\u4eec\u6539\u7528\u9000\u51fa\u72b6\u6001\u6765\u5224\u65ad\u7ed3\u679c\u4e86\uff0c\u90a3 Ansible \u7684 3 \u4e2a task \u4e5f\u8981\u4fee\u6539\u4e00\u4e0b\u3002\u7531\u4e8e\u811a\u672c\u5df2\u7ecf\u88ab\u6539\u5199\u4e3a 1 \u884c\uff0c\u5176\u5b9e\u4e5f\u6ca1\u5fc5\u8981\u653e\u5230\u4e00\u4e2a\u811a\u672c\u4e2d\u4e13\u95e8\u6267\u884c\u4e86\uff0c\u6240\u4ee5\u5c31\u53ef\u4ee5\u628a\u7b2c\u4e00\u4e2a task \u5220\u9664\u6389\u3002<\/p>\n<p>\u7b2c 2 \u4e2a task\uff0c\u539f\u5148\u662f\uff1a<\/p>\n<pre class=\"brush: bash; gutter: true\">- name: check if specific version of Oracle JDK is installed?\r\n  shell: LC_ALL=&quot;en_US.UTF-8&quot;  {{ java_download_path }}\/check-java-version.sh  &quot;{{ jdk_version }}&quot;\r\n  register: jdk_info\r\n  changed_when: false\r\n  failed_when: jdk_info.rc &gt; 0\r\n<\/pre>\n<p>\u6700\u540e\u6709\u4e00\u884c <code>failed_when: jdk_info.rc &gt; 0<\/code>\uff0c\u8fd9\u884c\u7684\u542b\u4e49\u5c31\u662f\u5982\u679c\u547d\u4ee4\u6267\u884c\u5931\u8d25\u5c31\u6807\u8bb0\u8fd9\u4e2a task \u4e3a\u5931\u8d25\u3002\u7c7b\u4f3c\u4e8e\u4e0b\u9762\u7684\u4ee3\u7801\uff1a<\/p>\n<pre class=\"brush: bash; gutter: true\">if(jdk_info.rc == false)\r\n  return false;\r\nelse\r\n  return true;\r\n<\/pre>\n<p>\u6240\u4ee5\u5176\u5b9e\u8fd9\u884c\u672c\u8eab\u5c31\u662f\u6ca1\u6709\u7528\u5904\u7684\u3002\u4f46\u662f\u73b0\u5728\u6211\u4eec\u8981\u5728 Ansible \u4e2d\u6839\u636e\u8fd9\u4e2a\u65b0\u7684\u547d\u4ee4\u7684\u9000\u51fa\u72b6\u6001\u6765\u5224\u65ad\u662f\u5426\u9700\u8981\u5b89\u88c5 Oracle JDK\uff0c\u6240\u4ee5\u9700\u8981\u5ffd\u7565\u8fd9\u4e2a task \u7684\u5931\u8d25\u3002\u56e0\u4e3a Ansible \u5728\u9047\u5230\u4efb\u4f55 task \u6267\u884c\u5931\u8d25\u540e\u90fd\u4f1a\u7ec8\u6b62\u6267\u884c\u5269\u4f59\u7684 task\u3002<\/p>\n<p>\u6539\u5199\u540e\u7684 Ansible \u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre class=\"brush: bash; gutter: true\">- name: check if specific version of Oracle JDK is installed?\r\n  shell: LC_ALL=&quot;en_US.UTF-8&quot; java -version 2&gt;&amp;1 | grep  &#039;&quot;{{ jdk_version }}&quot;&#039; | grep -iv openjdk\r\n  register: check_jdk\r\n  changed_when: false\r\n  ignore_errors: true\r\n\r\n- include: install.yml\r\n  when: ansible_check_mode or check_jdk is failed\r\n<\/pre>\n<p>\u6700\u540e\u7528\u5230\u4e86 Ansible \u7684\u5185\u90e8\u53d8\u91cf <code>ansible_check_mode<\/code>\uff0c\u7528\u6765\u5224\u65ad\u662f\u5426\u8fd0\u884c\u5728\u68c0\u67e5\u6a21\u5f0f\u4e0b\u3002\u56e0\u4e3a Ansible \u7684 <code>shell<\/code> \u6a21\u5757\u4e0d\u652f\u6301\u68c0\u67e5\u6a21\u5f0f\uff0c\u6240\u4ee5\u5f53 Ansible \u8fd0\u884c\u5728\u68c0\u67e5\u6a21\u5f0f\u4e0b\u7684\u65f6\u5019\uff0c\u8fd9\u4e2a task \u4f1a\u88ab\u5ffd\u7565\u3002\u5bfc\u81f4 <code>check_jdk<\/code> \u8fd9\u4e2a\u53d8\u91cf\u6ca1\u6709\u88ab\u5b9a\u4e49\uff0c\u4e0b\u4e00\u4e2a task \u5c31\u4f1a\u6267\u884c\u5931\u8d25\u3002<\/p>\n<h2 id=\"\u91cd\u6784\u7ed3\u679c\">\u91cd\u6784\u7ed3\u679c<\/h2>\n<p>\u5220\u6389\u4e86\u4e00\u4e2a\u811a\u672c\u548c\u4e00\u4e2a Ansible \u7684 task\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u539f\u5148\u811a\u672c\u4e2d\u7684\u00a0<code>java -version 2&gt;&amp;1 | grep $PACKAGE | grep -iv openjdk<\/code> \u8fd9\u884c\u5c31\u8db3\u591f\u4e86\uff0c\u5176\u5b83\u4ee3\u7801\u90fd\u4e0d\u9700\u8981\u3002Ansible \u7684 3 \u4e2a\u76f8\u5173 task \u4e5f\u53ef\u4ee5\u5220\u6389 1 \u4e2a\u3002<\/p>\n<p>\u4ee3\u7801\u8d8a\u591a\uff0cBug \u4e5f\u8d8a\u591a\u3002<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u4e2a\u5178\u578b\u7684 Shell \u811a\u672c\u7684\u8be6\u7ec6\u8bb2\u89e3\u548c\u91cd\u6784 \u4e0a\u5468\u65e0\u610f\u4e2d\u770b\u5230\u4e86\u4e00\u4e2a Shell \u811a\u672c\uff0c\u662f\u4e00\u4e2a\u5f88\u5178\u578b\u7684\u5f00\u53d1\u5de5\u7a0b\u5e08\u601d\u7ef4\u7684\u811a\u672c\u3002\u6211\u5c06\u4f1a\u5148\u5206\u6b65\u8bb2\u89e3\u4e00\u4e0b\u8fd9\u4e2a\u770b\u4e0a\u53bb\u5f88\u7b80\u5355\u7684\u811a\u672c\uff0c\u968f\u540e\u518d\u770b\u5982\u4f55\u91cd\u6784\u3002 \u811a\u672c\u7684\u5b8c\u6574\u4ee3\u7801\u5982\u4e0b\uff1a PACKAGE=&quot;\\&quot;$1\\&quot;&quot; line=$(java -version 2&gt;&amp;1 | grep $PACKAGE | grep -iv openjdk | wc -l) #echo $line if [[ $line =~ 0 ]]; then echo &#039;{ &quot;found&quot;: false , &quot;not_found&quot;: true }&#039; else echo &#039;{ &quot;found&quot;: true , &quot;not_found&quot;: false }&#039; fi TL;DR \u8b66\u544a\uff1a\u5982\u679c\u592a\u957f\u4e0d\u60f3\u770b\uff0c\u5c31\u7ffb\u5230\u6700\u540e\u770b\u91cd\u6784\u7ed3\u679c\u3002 \u811a\u672c\u7684\u8be6\u7ec6\u8bb2\u89e3 \u8fd9\u6bb5\u811a\u672c\u7684\u9700\u6c42\u5c31\u662f\u5224\u65ad\u662f\u5426\u5df2\u7ecf\u5b89\u88c5\u4e86\u7279\u5b9a\u7248\u672c\u7684 Oracle JDK\u3002\u5728\u8c03\u7528\u7684\u65f6\u5019\u4f1a\u4f20\u5165 Java [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-1491","post","type-post","status-publish","format-standard","hentry","category-6"],"_links":{"self":[{"href":"https:\/\/chaifeng.com\/wp-json\/wp\/v2\/posts\/1491","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chaifeng.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chaifeng.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chaifeng.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chaifeng.com\/wp-json\/wp\/v2\/comments?post=1491"}],"version-history":[{"count":8,"href":"https:\/\/chaifeng.com\/wp-json\/wp\/v2\/posts\/1491\/revisions"}],"predecessor-version":[{"id":1505,"href":"https:\/\/chaifeng.com\/wp-json\/wp\/v2\/posts\/1491\/revisions\/1505"}],"wp:attachment":[{"href":"https:\/\/chaifeng.com\/wp-json\/wp\/v2\/media?parent=1491"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chaifeng.com\/wp-json\/wp\/v2\/categories?post=1491"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chaifeng.com\/wp-json\/wp\/v2\/tags?post=1491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}