Linux – validate all the files before copying to all the remote servers

I have an ansible playbook which is made up of two plays as shown below:

• First play validates everything on the localbox where I am running my ansible before invoking Play2. If my validation fails in Play1 then I don't want to start Play2 at all.
• Second play will only start if Play1 validation is successful and this play creates a directory on remoter server if it is not there and then copies process.tar.gz file in a particular directory on all remote servers.

Below is my playbook:

---
- name: Play 1
  hosts: 127.0.0.1
  tasks:
      - name: check whether we have all the necessary files
        shell: "ls files/ | wc -l"
        retries: 10
        delay: 10
        register: number_of_files
        until: "number_of_files.stdout == '10'"

      - name: Total number of files
        debug: msg="Total files {{ number_of_files.stdout }}"

      - name: check whether all the files are generated within a minute difference
        shell: "find files/ -mmin -1 -type f -print | wc -l"
        register: file_time
        failed_when: "file_time.stdout != '10'"

      - name: Total number of files
        debug: msg="Total files {{ file_time }}"

      - name: check whether success file was generated
        shell: "ls files/SUCCESS | wc -l"
        register: success_file
        failed_when: "success_file.stdout != '1'"

      - name: Success file
        debug: msg="{{ success_file }}"

      - name: compress all the files in tar.gz
        shell: "rm process.tar.gz; tar -czvf process.tar.gz -C files . --exclude='SUCCESS'"

- name: Play 2
  hosts: ALL_HOSTS
  serial: "{{ serial }}"
  tasks:
      - name: creates directory
        file: path=/data/taks/files/ state=directory

      - name: copy and untar process.tar.gz file
        unarchive: src=process.tar.gz dest=/data/taks/files/

      - name: sleep for few seconds
        pause: seconds=20

I wanted to see if there is any better way to write my above ansible? Since I recently started working with ansible so not sure I am following all the best practices.. I am running ansible version ansible 2.4.3.0. Also I always get a warning from ansible on this task:

- name: compress all the files in tar.gz
  shell: "rm process.tar.gz; tar -czvf process.tar.gz -C files . --exclude='SUCCESS'"

Here is the warning:

[WARNING]: Consider using file module with state=absent rather than running rm
[WARNING]: Consider using unarchive module rather than running tar

Update:

Below is my path where my ansible playbook is sitting and from this directory only, I execute my PLAYBOOK1. And files directory contains all the files including SUCCESS which I need to compress into tar.gz.

jenkins@machineA:~/jobs/processdata/workspace$ ls -lrth
total 145M
drwxr-xr-x 2 jenkins jenkins 4.0K Feb 19 17:36 files
-rw-r--r-- 1 jenkins root    1.6K Feb 19 19:32 PLAYBOOK1.yml
-rw-r--r-- 1 jenkins root    1.6K Feb 19 19:32 PLAYBOOK2.yml

Here is the error I am getting after I execute PLAYBOOK1 with your changes:

TASK [Check all files] **********************************************************************************************************************************************************************
fatal: [127.0.0.1]: FAILED! => {"changed": false, "examined": 0, "failed_when_result": true, "files": [], "matched": 0, "msg": "/files was skipped as it does not seem to be a valid directory or it cannot be accessed\n"}