{"id":474,"date":"2022-07-21T21:46:34","date_gmt":"2022-07-21T13:46:34","guid":{"rendered":"https:\/\/frogvps.com\/?p=474"},"modified":"2022-07-21T21:46:34","modified_gmt":"2022-07-21T13:46:34","slug":"ansible-playbook%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8when","status":"publish","type":"post","link":"https:\/\/frogvps.com\/?p=474","title":{"rendered":"ansible playbook\u5982\u4f55\u4f7f\u7528when"},"content":{"rendered":"\n<p>when\u8bed\u53e5\u53ef\u4ee5\u5b9e\u73b0\u6761\u4ef6\u6d4b\u8bd5\u3002\u5982\u679c\u9700\u8981\u6839\u636e\u53d8\u91cf\u3001facts\u6216\u6b64\u524d\u4efb\u52a1\u7684\u6267\u884c\u7ed3\u679c\u6765\u505a\u4e3a\u67d0\u4e2atask\u6267\u884c\u4e0e\u5426\u7684\u524d\u63d0\u65f6\u8981\u7528\u5230\u6761\u4ef6\u6d4b\u8bd5\u3002\u901a\u8fc7\u5728task\u540e\u6dfb\u52a0when\u5b50\u53e5\u5373\u53ef\u4f7f\u7528\u6761\u4ef6\u6d4b\u8bd5\uff0cjinja2\u7684\u8bed\u6cd5\u683c\u5f0f\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">when<\/h2>\n\n\n\n<p><strong>\u8303\u4f8b<\/strong><\/p>\n\n\n\n<p>\u91cd\u542f\u6240\u6709\u7684RedHat\u673a\u5668<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: webservers\n  tasks:\n    - name: reboot redhat vps\n      reboot:\n      when: ansible_os_family==\"RedHat\"<\/code><\/pre>\n\n\n\n<p>\u5bf9\u4e3b\u673a\u540d\u8fdb\u884c\u6761\u4ef6\u5224\u65ad<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: webservers\n  tasks:\n    - name: print hostname if it matches frog\n      shell: wall \"hostname is {{ ansible_facts.hostname }}\"\n      when: ansible_hostname is match (\"frog*\")<\/code><\/pre>\n\n\n\n<p>\u5982\u679c\u670d\u52a1\u6ca1\u6709\u542f\u52a8\u5c31\u542f\u52a8\u670d\u52a1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: webservers\n  tasks:\n    - name: Check nginx service \n      shell: systemctl is-active nginx\n      register: check_nginx\n      ignore_errors: yes\n    - name: start nginx \n      service: name=nginx state=started \n      when: check_nginx.rc &gt; 0<\/code><\/pre>\n\n\n\n<p>\u5173\u95edCentos7\u7248\u672c\u7684\u4e3b\u673a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: all\n  tasks: \n    - name: Shutdown centos7\n      shell: shutdown -t now\n      when:\n        - ansible_facts&#91;'distribution']=='CentOS'\n        - ansible_facts&#91;'distribution_major_version']=='7'<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u4e5f\u53ef\u4ee5\u5199\u6210<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: all\n  tasks: \n    - name: Shutdown centos7\n      shell: shutdown -t now\n      when: ansible_distribution=='CentOS' and ansible_distribution_major_version=='7'<\/code><\/pre>\n\n\n\n<p>\u5224\u65ad\u53d8\u91cf\u662f\u5426\u5b9a\u4e49<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: webservers\n  tasks:\n    - debug: msg=\"port is undefined\"\n      when: port is undefined<\/code><\/pre>\n\n\n\n<p>when\u548c\u5faa\u73af\u4e00\u8d77\u4f7f\u7528<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: webservers\n  tasks:\n    - name: echo item&gt;3\n      debug:\n        msg: \"{{ item }} &gt; 3\"\n      with_items: &#91;1,2,3,4,5,6]\n      when: item &gt; 3<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">failed_when<\/h2>\n\n\n\n<p>\u5f53failed_when\u540e\u9762\u7684\u6761\u4ef6\u6ee1\u8db3\u65f6\uff0c\u4efb\u52a1\u5931\u8d25<\/p>\n\n\n\n<p><strong>\u8303\u4f8b<\/strong><\/p>\n\n\n\n<p>\u5982\u679c\u6761\u4ef6\u6ee1\u8db3\uff0c\u4efb\u52a1\u5931\u8d25\uff0c\u4e0d\u6267\u884c\u540e\u7eed\u4efb\u52a1\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: webservers\n  tasks:\n    - shell: echo \"failed\"\n      register: result\n      failed_when: \"'failed' in result.stdout\"\n    - debug: msg=\"success\"<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">block<\/h2>\n\n\n\n<p>\u5f53\u60f3\u5728\u6ee1\u8db3\u4e00\u4e2a\u6761\u4ef6\u4e0b\uff0c\u6267\u884c\u591a\u4e2a\u4efb\u52a1\u65f6\uff0c\u5c31\u9700\u8981block\u5206\u7ec4\u4e86\u3002<\/p>\n\n\n\n<p><strong>\u8303\u4f8b<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: webservers\n  tasks:\n    - block: \n        - debug: msg=\"task1\"\n        - debug: msg=\"task2\"\n      when:\n        - ansible_distribution=='CentOS'\n        - ansible_distribution_major_version=='8'<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">changed_when<\/h2>\n\n\n\n<p>\u6709\u4e9b\u4efb\u52a1\uff08\u4f8b\u5982ps aux\uff09\u4e0d\u4f1a\u771f\u6b63\u4fee\u6539\u88ab\u63a7\u7aef\u4f46\u662f\u6267\u884c\u5b8c\u4f1a\u663e\u793a\u9ec4\u8272\u7684changed\u72b6\u6001\uff0c\u5bb9\u6613\u9020\u6210\u8bef\u89e3\uff0c\u53ef\u4ee5\u901a\u8fc7changed_when\u6765\u5173\u95ed\u3002<\/p>\n\n\n\n<p><strong>\u8303\u4f8b<\/strong><\/p>\n\n\n\n<p>\u5173\u95edchanged<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: webservers\n  tasks:\n    - shell: ps aux\n      changed_when: false<\/code><\/pre>\n\n\n\n<p>\u68c0\u67e5task\u8fd4\u56de\u7ed3\u679c\uff0c\u6210\u529f\u5219\u7ee7\u7eed\u5411\u4e0b\u6267\u884c\u3002\u68c0\u67e5nginx\u914d\u7f6e\u6587\u4ef6\uff0c\u6210\u529f\u624d\u7ee7\u7eed\u542f\u52a8\u670d\u52a1\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: webservers\n  tasks:\n    - name: Install nginx\n      yum:\n        name: nginx\n        state: present\n    - name: Create config\n      template: \n        src: nginx.conf.j2\n        dest: \/etc\/nginx\/nginx.conf\n      notify: Restart nginx service\n    - name: Syntax check\n      shell: nginx -t \n      register: result\n      changed_when: \n        - (result.stdout.find('success'))\n        - false\n    - name: Start nginx service\n      service:\n        name: nginx\n        state: started\n  handlers:\n    - name: Restart nginx service\n      service:\n        name: nginx\n        state: restarted      <\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">serial<\/h2>\n\n\n\n<p>\u89e3\u51b3ansible\u7531\u4e8e\u7ba1\u7406\u8282\u70b9\u8fc7\u591a\u9020\u6210\u7684\u8d85\u65f6\u95ee\u9898\u3002<\/p>\n\n\n\n<p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cAnsible\u5c06\u5c1d\u8bd5\u5e76\u884c\u7ba1\u7406playbook\u4e2d\u6240\u6709\u7684\u673a\u5668\u3002\u5bf9\u4e8e\u6eda\u52a8\u66f4\u65b0\u7528\u4f8b\uff0c\u53ef\u4ee5\u4f7f\u7528serial\u5173\u952e\u5b57\u5b9a\u4e49Ansible\u4e00\u6b21\u5e94\u7ba1\u7406\u591a\u5c11\u4e3b\u673a\uff0c\u8fd8\u53ef\u4ee5\u5c06serial\u5173\u952e\u5b57\u6307\u5b9a\u4e3a\u767e\u5206\u6bd4\uff0c\u8868\u793a\u6bcf\u6b21\u5e76\u884c\u6267\u884c\u7684\u4e3b\u673a\u6570\u5360\u603b\u6570\u7684\u6bd4\u4f8b\u3002<\/p>\n\n\n\n<p><strong>\u8303\u4f8b<\/strong><\/p>\n\n\n\n<p>\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u5047\u5982\u67093\u4e2atask\uff0cansible\u4f1a\u5148\u6267\u884c\u6240\u6709\u4e3b\u673a\u7684task1\uff0c\u7136\u540e\u6267\u884c\u6240\u6709\u4e3b\u673a\u7684task2\uff0c\u6700\u540e\u6267\u884c\u6240\u6709\u4e3b\u673a\u7684task3\u3002<\/p>\n\n\n\n<p>\u8bbe\u7f6eserial=1\uff0c\u53ef\u4ee5\u8ba9ansible\u6bcf\u6b21\u6267\u884c\u5b8c1\u53f0\u673a\u5668\u7684\u6240\u6709task\u540e\uff0c\u518d\u53bb\u6267\u884c\u5176\u4ed6\u673a\u5668\u7684task\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: all\n  serial: 1\n\n  tasks:\n    - debug: \n        msg: '\"{{ ansible_nodename }}\" running task1'\n    - debug: \n        msg: '\"{{ ansible_nodename }}\" running task2'\n    - debug: \n        msg: '\"{{ ansible_nodename }}\" running task3'<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">delegate_to<\/h2>\n\n\n\n<p>\u5229\u7528\u59d4\u6d3e\u6280\u672f\uff0c\u53ef\u4ee5\u5728\u975e\u5f53\u524d\u88ab\u63a7\u4e3b\u673a\u7684\u5176\u5b83\u4e3b\u673a\u4e0a\u6267\u884c\u6307\u5b9a\u64cd\u4f5c<\/p>\n\n\n\n<p><strong>\u8303\u4f8b<\/strong><\/p>\n\n\n\n<p>\u5728154.17.22.52\u4e0a\u6267\u884c\u547d\u4ee4\uff0c\u800c\u4e0d\u662f\u5728localhost<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: localhost\n  tasks:\n    - shell: wall hahaha\n      delegate_to: 154.17.22.52<\/code><\/pre>\n\n\n\n<p>\u5728\u672c\u5730\u6267\u884cifconfig<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: webservers\n  tasks:\n    - name: show ip\n      local_action: command ifconfig<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">run_once<\/h2>\n\n\n\n<p>\u5229\u7528run_once\u53ef\u4ee5\u8ba9\u4efb\u52a1\u53ea\u6267\u884c\u4e00\u6b21\uff0c\u800c\u4e0d\u662f\u5728\u6240\u6709\u4e3b\u673a\u90fd\u6267\u884c\u3002<\/p>\n\n\n\n<p><strong>\u8303\u4f8b<\/strong><\/p>\n\n\n\n<p>\u53ea\u663e\u793a\u5176\u4e2d\u4e00\u53f0\u4e3b\u673a\u7684\u540d\u5b57<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: all\n  tasks:\n    - debug: \n        msg: \"{{ ansible_nodename }}\"\n      run_once: true<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">environment<\/h2>\n\n\n\n<p>\u4e34\u65f6\u4fee\u6539\u88ab\u63a7\u7aef\u7684\u73af\u5883\u53d8\u91cf<\/p>\n\n\n\n<p><strong>\u8303\u4f8b<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: webservers\n  tasks:\n    - shell: echo $PATH &gt; \/tmp\/path.log\n      environment:\n        PATH: \/tmp:{{ ansible_env.PATH }}<\/code><\/pre>\n\n\n\n<p>\u6267\u884c\u7ed3\u679c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;root@frog448 \/tmp]#cat path.log \n\/tmp:\/usr\/local\/sbin:\/usr\/local\/bin:\/usr\/sbin:\/usr\/bin<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">wait_for<\/h2>\n\n\n\n<p>\u7b49\u5f85\u6761\u4ef6\u518d\u6267\u884c<\/p>\n\n\n\n<p><strong>\u7528\u6cd5<\/strong><\/p>\n\n\n\n<p>\u6682\u505c10s\u7b49\u5f85\u7aef\u53e380\u6253\u5f00<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>wait_for: port=80 delay=10<\/code><\/pre>\n\n\n\n<p>\u7b49\u5f85\u76f4\u5230\u9501\u5b9a\u6587\u4ef6\u88ab\u5220\u9664<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>wait_for: path=\/var\/lock\/file.lock state=absent<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">yaml\u6587\u4ef6\u7684\u76f8\u4e92\u8c03\u7528<\/h2>\n\n\n\n<p>\u5229\u7528include \u6216 include_tasks \u53ef\u4ee5\u5728\u67d0\u4e2atask\u4e2d\u8c03\u7528\u5176\u5b83\u7684<strong>\u53ea\u6709task\u5185\u5bb9<\/strong>\u7684yaml\u6587\u4ef6<\/p>\n\n\n\n<p><strong>\u8303\u4f8b<\/strong><\/p>\n\n\n\n<p>\u8c03\u7528b.yml<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: webservers \n\n  tasks:\n    - name: run job a\n      shell: wall job a\n    - name: run job b\n      include: b.yml<\/code><\/pre>\n\n\n\n<p>\u6587\u4ef6b.yml<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- name: run job b\n  shell: wall job b<\/code><\/pre>\n\n\n\n<p>\u4e5f\u53ef\u4ee5\u5c06\u591a\u4e2a\u5305\u542b\u5b8c\u6574\u5185\u5bb9\u7684yml\u6587\u4ef6\u7531\u4e00\u4e2ayml\u7edf\u4e00\u8c03\u7528<\/p>\n\n\n\n<p><strong>\u8303\u4f8b<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- import_playbook: task1.yml\n- import_playbook: task2.yml<\/code><\/pre>\n\n\n\n<p>\u6587\u4ef6task1.yml<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: webservers\n  tasks: \n    - name: run task1\n      shell: wall task1<\/code><\/pre>\n\n\n\n<p>\u6587\u4ef6task2.yml<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>---\n- hosts: dmit\n  tasks:\n    - name: run task2\n      shell: wall task2<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>when\u8bed\u53e5\u53ef\u4ee5\u5b9e\u73b0\u6761\u4ef6\u6d4b\u8bd5\u3002\u5982\u679c\u9700\u8981\u6839\u636e\u53d8\u91cf\u3001facts\u6216\u6b64\u524d\u4efb\u52a1\u7684\u6267\u884c\u7ed3\u679c\u6765\u505a\u4e3a\u67d0\u4e2atask\u6267\u884c\u4e0e\u5426\u7684\u524d\u63d0\u65f6\u8981\u7528\u5230\u6761\u4ef6\u6d4b\u8bd5\u3002\u901a\u8fc7\u5728task\u540e\u6dfb\u52a0when\u5b50\u53e5\u5373\u53ef\u4f7f\u7528\u6761\u4ef6\u6d4b\u8bd5\uff0cjinja2\u7684\u8bed\u6cd5\u683c\u5f0f\u3002 when \u8303\u4f8b \u91cd\u542f\u6240\u6709\u7684RedHa&#8230;<\/p>\n","protected":false},"author":1,"featured_media":439,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43],"tags":[44],"topic":[],"class_list":["post-474","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ansible","tag-ansible"],"_links":{"self":[{"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/posts\/474","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/frogvps.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=474"}],"version-history":[{"count":3,"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/posts\/474\/revisions"}],"predecessor-version":[{"id":477,"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/posts\/474\/revisions\/477"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/media\/439"}],"wp:attachment":[{"href":"https:\/\/frogvps.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=474"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/frogvps.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=474"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/frogvps.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=474"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/frogvps.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftopic&post=474"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}