performance - 提高 Ansible 性能

Question

我正在尝试提高 ansible playbook 的性能。我有一个测试剧本如下:

---
- name: Test
  hosts: localhost
  connection: local
  gather_facts: false
  tasks:
    - name: Creating an empty file
      file:
        path: /tmp/hello
        state: touch

    - name: Test
      command: "echo 'Hello, World!' >> /tmp/hello"
      with_sequence: start=1 end=500
      delegate_to: localhost

运行这需要惊人的 57 秒。与执行相同操作的 bash 脚本相比:
测试文件

#!/bin/bash
touch /tmp/hello
for i in {1..500}
do
  sh /home/admin/hello.sh
  echo "This is iteration $i"
done

你好.sh

#!/bin/bash
echo "Hello, World!" >> /tmp/hello

这需要大约 1.5 秒才能运行。
我已经对 ansible.cfg 做了一些更改文件

[ssh_connection]
ssh_args = -o ControlMaster=auto -o ControlPersist=18000s -o PreferredAuthentications=publickey
control_path = %(directory)s/ansible-ssh-%%h-%%p-%%r
pipelining = True

我还能做些什么来改善这种糟糕的表现？

Answer 1

使用您的代码，ansible 将连接到主机 500 次以运行命令。您可以先创建所需的文件，然后将其上传到主机。
剧本.yml

---
- name: Test
  hosts: localhost
  connection: local
  gather_facts: false
  tasks:
    - name: create 'hello' file
      ansible.builtin.template:
        src: "../templates/hello.j2"
        dest: "/tmp/hello"

你好.j2

{% for i in range(500) %}
Hello, World!
{% endfor %}