ansible 各种常见小技能汇总

##使用指定用户hbase运行脚本

- name: "start hbase region server cluster"

  shell: "{{software_root_dir}}/{{hbase_foldername}}/bin/start-hbase.sh &"

  become: yes

  become_method: su

  become_user:  "{{hbase_cluster_config['hbase_username']}}"

##计算时间差

- set_fact: kafka_deploy_start_timestamp="{{lookup('pipe','date \"+%Y-%m-%d %H:%M:%S\"')}}"

- set_fact: kafka_deploy_finished_timestamp="{{lookup('pipe','date \"+%Y-%m-%d %H:%M:%S\"')}}"

- name: "kafka_deploy 开始时间: {{kafka_deploy_start_timestamp}} 结束时间: {{kafka_deploy_finished_timestamp}} 共耗时{{( (kafka_deploy_finished_timestamp | to_datetime) - (kafka_deploy_start_timestamp | to_datetime)).total_seconds()}}秒."

  debug: msg=" "

- name: "添加用户{{hbase_username}}到指定组hadoop "

  shell: "usermod -a -G hadoop  {{hbase_username}}"

##动态添加一个资源池到vmware vCenter

- name: "动态添加一个资源池到vmware vCenter"

  vmware_resource_pool:

    hostname: "{{vcenterconfig['vcenterhostname']}}"

    username: "{{vcenterconfig['vcenterusername']}}"

    password: "{{vcenterconfig['vcenterpassword']}}"

    datacenter: "{{vcenterconfig['datacenter']}}"

    validate_certs: no

    cluster: “test-cluster”  #这个参数是要实现在vcenter 里点击右键创建的

    resource_pool: "{{vcenterconfig['resource_pool']}}"

    mem_shares: normal

    mem_limit: -1

    mem_reservation: 0

    mem_expandable_reservations: True

    cpu_shares: normal

    cpu_limit: -1

    cpu_reservation: 0

    cpu_expandable_reservations: True

    state: present

##浮点数 取整  //

- debug: var="{{ (nificonfig['zookeeper_cluster_uri'].split(",") | length | int + 1) // 2 | int }}"

##批量合并列表合并对象

- name: "批量合并列表合并对象"

  set_fact: all_host_list="{{ all_host_list }} + {{ hostdict[item] }}"

  with_items: "{{hostdict.keys()}}"

用+,列表合并

# use case I: appending to LIST variable:

      - name: my appender

        set_fact:

          my_list_var: '{{my_list_myvar + new_items_list}}'

循环修改外层变量

{% set vars = {'foo': False} %}

{% for item in items %}

  {% if vars.update({'foo': True}) %} {% endif %}

  {% if vars.foo %} Ok(1)! {% endif %}

{% endfor %}

{% if vars.foo %} Ok(2)! {% endif %}

jinja2 字典可以用 keys(), values() 来直接访问里面的集合

{% for item  in ip_hostname_dict.values() %}

vagrant up {{item}} &

{%  endfor %}

{% for item  in ip_hostname_dict.keys() %}

ping -c 3 {{item}}

{%  endfor %}

##ansible 遍历字典的方法  多层for循环, 修改外层变量, dictionary map 使用方法 开心实战

{% set ip_hostname_dict={} %}

{% for key,dict_item  in hostdict.items() %}

    {%  for temphost  in  hostdict[key]  %}

        {%  if ip_hostname_dict[temphost.ip] is undefined %}

#{{temphost.name.split('.')[0]}}

        config.vm.define "{{temphost.name.split('.')[0]}}" do |web|

        web.vm.hostname = "{{temphost.name.split('.')[0]}}"

        web.vm.network :public_network, ip: "{{temphost.ip}}", bridge: "{{vm_bridge_nic_name}}", bootproto: "static", gateway: "{{gateway}}"

        web.vm.provider :virtualbox do |vb|

        vb.linked_clone = true

        vb.name = "{{temphost.name.split('.')[0]}}"

        vb.cpus = {{temphost.cpu}}

        vb.memory = {{temphost.memory}}

        vb.customize ["modifyvm", :id, "--nictype1", "virtio"]

        vb.customize ["modifyvm", :id, "--nictype2", "virtio"]

        end

        end

        {% endif %}

    {%   do ip_hostname_dict.update({temphost.ip : temphost.name})  %}

    {%  endfor %}

{%  endfor %}

#find 模块必须使用绝对路径,这里的 playbook_dir是当前role的main.yml的所在位置 这样用户不管拷贝这个文件夹到哪里部署都是正确的

- name: "查找{{ playbook_dir }}/roles/marathon-app-deploy/templates/marathon-apps files end with .json.j2,.json 文件"

  find:

    paths: "{{ playbook_dir }}/roles/marathon-app-deploy/templates/marathon-apps/"

    recurse: yes

    file_type: "file"

    patterns: '*.json.j2,*.JSON.J2,*.json'

  register: json_file_matched

  delegate_to: 127.0.0.1