As an Ansible newbie, I’m installing some packages on multiple Ubuntu machines using a loop, here’s my playbook:

---
- name: Install Software 
  hosts: all             
  become: true    
  tasks:                 
    - name: Update package cache 
      package:                    # Use the package module
        name: "{{ item }}"        
        state: present            
      with_items:                 # Loop over the package list
        - vim                      
        - tree                     
        - figlet                   
      ignore_errors: yes         # Ignore errors if packages fail to install
      retries: 3                 # Number of retries if task fails
      delay: 10                  # Delay between retries in seconds

At the first run the playbook fails on one of the hosts, here’s the error message:

failed: [serv01] (item=tree) => {“ansible_loop_var”: “item”,
“cache_update_time”: 1716373387, “cache_updated”: false, “changed”:
false, “item”: “tree”, “msg”: “‘/usr/bin/apt-get -y -o
“Dpkg::Options::=–force-confdef” -o
“Dpkg::Options::=–force-confold” install ‘tree=2.0.2-1”
failed: E: Could not get lock /var/lib/dpkg/lock-frontend. It is held
by process 1567 (apt-get)nE: Unable to acquire the dpkg frontend lock
(/var/lib/dpkg/lock-frontend), is another process using it?n”, “rc”:
100, “stderr”: “E: Could not get lock /var/lib/dpkg/lock-frontend. It
is held by process 1567 (apt-get)nE: Unable to acquire the dpkg
frontend lock (/var/lib/dpkg/lock-frontend), is another process using
it?n”, “stderr_lines”: [“E: Could not get lock
/var/lib/dpkg/lock-frontend. It is held by process 1567 (apt-get)”,
“E: Unable to acquire the dpkg frontend lock
(/var/lib/dpkg/lock-frontend), is another process using it?”],
“stdout”: “”, “stdout_lines”: []} failed: [serv01] (item=figlet) =>
{“ansible_loop_var”: “item”, “cache_update_time”: 1716373387,
“cache_updated”: false, “changed”: false, “item”: “figlet”, “msg”:
“‘/usr/bin/apt-get -y -o “Dpkg::Options::=–force-confdef” -o
“Dpkg::Options::=–force-confold” install ‘figlet=2.2.5-3”
failed: E: Could not get lock /var/lib/dpkg/lock-frontend. It is held
by process 1567 (apt-get)nE: Unable to acquire the dpkg frontend lock
(/var/lib/dpkg/lock-frontend), is another process using it?n”, “rc”:
100, “stderr”: “E: Could not get lock /var/lib/dpkg/lock-frontend. It
is held by process 1567 (apt-get)nE: Unable to acquire the dpkg
frontend lock (/var/lib/dpkg/lock-frontend), is another process using
it?n”, “stderr_lines”: [“E: Could not get lock
/var/lib/dpkg/lock-frontend. It is held by process 1567 (apt-get)”,
“E: Unable to acquire the dpkg frontend lock
(/var/lib/dpkg/lock-frontend), is another process using it?”],
“stdout”: “”, “stdout_lines”: []}
…ignoring

When I run the playbook again, it is successful on all hosts.

How do I tell Ansible to wait til the lock is released? Or is it possible to install packages concurrently?