Ansible playbook for installing Letta with an external pgvector database

playbook.yml

---
- name: Install Letta Server with Docker
  hosts: all
  become: true
  vars:
    letta_data_dir: /opt/letta/data
    postgres_password: ""
    anthropic_api_key: ""
    mistral_api_key: ""
    postgres_host: ""
    letta_server_secure: "true"
    letta_server_password: ""
    ollama_base_url: ""

  tasks:
    - name: Install required packages
      apt:
        name:
          - apt-transport-https
          - ca-certificates
          - curl
          - software-properties-common
          - python3-pip
        state: present
        update_cache: yes

    - name: Add Docker GPG key
      apt_key:
        url: https://download.docker.com/linux/ubuntu/gpg
        state: present

    - name: Add Docker repository
      apt_repository:
        repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu {{ ansible_distribution_release }} stable
        state: present

    - name: Install Docker
      apt:
        name: docker-ce
        state: present
        update_cache: yes

    - name: Create Letta directories
      file:
        path: "{{ item }}"
        state: directory
        mode: '0755'
      loop:
         - "{{ letta_data_dir }}"

    - name: Install Docker Python dependencies
      pip:
        name:
          - "docker>=3.0.0,<7.0.0"
          - "requests<2.32"
          - "dbus-python"
        state: present

    - name: Start Docker service
      service:
        name: docker
        state: started
        enabled: yes

    - name: Pull Letta Docker image
      docker_image:
        name: letta/letta
        source: pull
        tag: latest

    # https://github.com/letta-ai/letta/discussions/2276
    - name: Run Letta container
      docker_container:
        name: letta-server
        image: letta/letta:latest
        network_mode: host
        state: started
        restart_policy: unless-stopped
        volumes:
          - "{{ letta_data_dir }}:/data"
        env:
          SECURE: "{{ letta_server_secure }}"
          LETTA_SERVER_PASSWORD: "{{ letta_server_password }}"
          LETTA_DEBUG: "false"
          ANTHROPIC_API_KEY: "{{ anthropic_api_key }}"
          MISTRAL_API_KEY: "{{ mistral_api_key }}"
          OLLAMA_BASE_URL: "{{ ollama_base_url }}"
          LETTA_PG_URI: "postgresql://letta:{{ postgres_password }}@{{ postgres_host }}:5432/letta"
        ports:
          - "8283:8283"

    - name: Wait for Letta server to be ready
      wait_for:
        port: 8283
        timeout: 60

    - name: add vagrant to docker group
      ansible.builtin.user:
        name: USERNAME
        groups: docker
        append: true
        
  # You will need to expose the server IP to letta ADE
  # https://docs.letta.com/quickstart/docker#access-the-letta-ade-agent-development-environment