要为每个主机生成递增间隔，可以使用Ansible的with_sequence循环和start参数来实现。下面是一个代码示例：

- name: Generate incremental interval for each host
  hosts: all
  gather_facts: false
  tasks:
    - name: Generate interval
      shell: echo "{{ hostvars[item].ansible_hostname }}: {{ (item|int * 10) + 10 }}"
      with_sequence: start=0
      register: interval_output

    - name: Print interval
      debug:
        var: interval_output.results

在上面的示例中，通过with_sequence循环从0开始生成一个递增序列。然后，使用shell模块将主机名和计算出的递增间隔打印出来，并将结果存储在interval_output变量中。最后，使用debug模块打印出interval_output.results。

运行以上示例的结果可能如下所示：

TASK [Print interval] **********************************************************
ok: [host1] => {
    "interval_output.results": [
        {
            "ansible_loop_var": "item",
            "changed": true,
            "cmd": "echo \"host1: 10\"",
            "delta": "0:00:00.002310",
            "end": "2021-07-01 09:00:00.000000",
            "failed": false,
            "invocation": {
                "module_args": {
                    "_raw_params": "echo \"host1: 10\"",
                    "_uses_shell": true,
                    "argv": null,
                    "chdir": null,
                    "creates": null,
                    "executable": null,
                    "removes": null,
                    "stdin": null,
                    "stdin_add_newline": true,
                    "strip_empty_ends": true,
                    "warn": true
                }
            },
            "item": "0",
            "rc": 0,
            "start": "2021-07-01 09:00:00.000000",
            "stderr": "",
            "stderr_lines": [],
            "stdout": "host1: 10",
            "stdout_lines": [
                "host1: 10"
            ]
        },
        {
            "ansible_loop_var": "item",
            "changed": true,
            "cmd": "echo \"host2: 20\"",
            "delta": "0:00:00.002295",
            "end": "2021-07-01 09:00:00.000000",
            "failed": false,
            "invocation": {
                "module_args": {
                    "_raw_params": "echo \"host2: 20\"",
                    "_uses_shell": true,
                    "argv": null,
                    "chdir": null,
                    "creates": null,
                    "executable": null,
                    "removes": null,
                    "stdin": null,
                    "stdin_add_newline": true,
                    "strip_empty_ends": true,
                    "warn": true
                }
            },
            "item": "1",
            "rc": 0,
            "start": "2021-07-01 09:00:00.000000",
            "stderr": "",
            "stderr_lines": [],
            "stdout": "host2: 20",
            "stdout_lines": [
                "host2: 20"
            ]
        }
    ]
}

从上面的示例输出中，我们可以看到每个主机都生成了递增的间隔，根据主机名和递增序列计算而来。