More content and playbooks

* more readme.md content
* imported basic roles
* commented said basic roles
* trimmed down playbooks to be understandable
* update requirements.txt deps

roles/base/tasks/main.yml

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+---
+# welcome to tbe base.yml role. As you can see, this is a collection of
+# tasks, which in turn is basically a structure like this one
+# name: "user friendly name of your task"
+# a_module_name:
+#   a_module_parameter: value
+#   another_module_parameter: value2
+
+# this installs packages, here we use the `apt` module
+# because we are on a debian-based distribution. If we were
+# using something like Fedora for instance, we would have used
+# the `dnf` module. Then just pass as arguments the names of
+# the packages you want to install just as you would pass them
+# to `apt install`.
+- name: "Install wanted packages"
+  apt:
+    name:
+      - apt-transport-https
+      - arptables
+      - bash-completion
+      - bridge-utils
+      - ca-certificates
+      - cmake
+      - coreutils
+      - curl
+      - dnsutils
+      - ebtables
+      - file
+      - gawk
+      - git
+      - glusterfs-client
+      - glusterfs-server
+      - gnupg
+      - htop
+      - iftop
+      - ifstat
+      - iputils-ping
+      - iptables
+      - iproute2
+      - jq
+      - libsqlite3-dev
+      - libffi-dev
+      - libpython3-dev
+      - libssl-dev
+      - locales-all
+      - lsb-release
+      - lsof
+      - lvm2
+      - mdadm
+      - minicom
+      - mtr-tiny
+      - netcat
+      - net-tools
+      - ntp
+      - open-iscsi
+      - openssl
+      - p7zip-full
+      - pwgen
+      - sqlite3
+      - strace
+      - sudo
+      - sysstat
+      - telnet
+      - tcpdump
+      - tmux
+      - uuid-runtime
+      - unzip
+      - vim-nox
+      - wget
+      - wipe
+      - zip
+    # state: latest will update the package everytime the
+    # role is ran against a host
+    state: latest
+    # Update the cache before trying to update ?
+    # You generally want this because it's not updating itself
+    update_cache: true
+    # force update it if it's been updated for longer than an hour
+    cache_valid_time: 3600
+  register: apt_res
+  # if running apt fails, retry to do it up to 5 times then give up and cry in the corner
+  retries: 5
+  until: apt_res is success
+# Same as above, except you *remove* packages instead of installing them
+- name: "Remove unanted packages"
+  apt:
+    name:
+      - ntpdate
+    # note the value of `state` here
+    state: absent
+# This renders a template, the `inventory_hostname` is a variable
+# that is golbally available. It will map to the hostname you
+# assigned your host in the `inventory` file
+- name: "Hard set hostname"
+  template:
+    src: hostname.j2
+    dest: /etc/hostname
+    owner: root
+    group: root
+    # you need to put it in string mode, and you need to
+    # have a leading `0`, otherwise ansible is going to interpret it weird
+    # more info https://docs.ansible.com/ansible/latest/collections/ansible/builtin/file_module.html#parameter-mode
+    mode: "0644"
+- name: "Setup motd"
+  template:
+    src: motd.j2
+    dest: /etc/motd
+    owner: root
+    group: root
+    mode: "0644"
+- name: "Setup hosts"
+  template:
+    src: hosts.j2
+    dest: /etc/hosts
+    owner: root
+    group: root
+    mode: "0644"
+# Note that you can also just `copy` files using the copy module:
+# https://docs.ansible.com/ansible/latest/collections/ansible/builtin/copy_module.html#examples
+# And finally you can create files and directories with the `file` module
+# https://docs.ansible.com/ansible/latest/collections/ansible/builtin/file_module.html#examples

roles/base/templates/hostname.j2

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+{{ inventory_hostname }}

roles/base/templates/hosts.j2

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+127.0.0.1       localhost
+{{ ansible_default_ipv4["address"] }} {{ inventory_hostname }}
+

roles/base/templates/motd.j2

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+            This is {{ ansible_fqdn }}
+
+System       : {{ ansible_distribution }} {{ ansible_distribution_version }} ({{ ansible_distribution_release }})
+
+Kernel       : {{ ansible_kernel }} {{ ansible_kernel_version }}
+CPU(s)       : {{ ansible_processor_cores }}
+RAM          : {{ ansible_memory_mb.real.total }}Mb
+Architecture : {{ ansible_architecture }}
+Address      : {{ ansible_default_ipv4.interface }} - {{ ansible_default_ipv4.address }}