group_vars/all/ssh.yml

+---
+people:
+  - user: axx
+    editor: /usr/bin/vim
+    git_author_email: as@laquadrature.net
+    git_author_name: Axx
+    keys:
+      - key: ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILF4SziV0jbp6DqnAaOx7/1dGDosmrWGa5TDCBxPV4sm
+        comment: as@laquadrature.net
+  - user: Benjamin Sonntag
+    editor: /usr/bin/emacs
+    git_author_email: bs@laquadrature.net
+    git_author_name: Benjamin Sonntag
+    keys:
+      - key: ssh-rsa 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
+        comment: benjamin@mg
+  - user: Guinness
+    editor: /usr/bin/vim
+    git_author_email: oudin@crans.org
+    git_author_name: Rémi Oudin
+    keys:
+      - key: ecdsa-sha2-nistp521 AAAAE2VjZHNhLXNoYTItbmlzdHA1MjEAAAAIbmlzdHA1MjEAAACFBAEQkcf9ULA7Fkaa9yTDuhqQZCD4kycfd0bjYESPBpvBZuHWiyUiiofpOsYcdWZQ+fuz1Hv1GGU5zFh367d5piRL2QFVvTk7pwH+iUrkxnMyF6f7n3Y1ZyrrUP41Xf8FmqSm1pfVjtNGuqkH7jNF+/jg3cSi642gs8aMkaG4tTrdt8ksxQ==
+        comment: remi@olaf
+  - user: Mindiell
+    editor: /usr/bin/vim
+    git_author_email: tb@laquadrature.net
+    git_author_name: Mindiell
+    keys:
+      - key: ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAACAQCsEKH9T16VFIztigwiCWDEkgjW0F++NAHgh+MsiIPglcJ9VTmkw4nQDwbIS3cL4RMb6T30DAcxDG/k5YSh+KPC/G5xkmkS6/CVwCHBFvDByYDl6Dy0iGVExWE+I/ovnFOpoGRDMkGsyki5qXUcfDYW63fT2rPI6TgozAPrvLjIqoWSa686VcFtQGLP47xMhU3bPc1bchavyNAlSUKn6pXO07uab2ea327wMbkIU7JPj2IDuC08ZLgqE5EliRbvS7MUf4ewJXmHVahViCReAkboBvcfW9MVT22kifg+HikLU701PV2kCIfatL3/mcyI0G34yc1B7KSmS08CnKy9IzWW1SJdm6uM7zshtYFq0NmqamdV88btgh7aSxL8N73Kwk0thynTa1iX+QZpX49dH/kSRuwxUSeki172i1SHZT+9/cpymDumZDM4q9wZYZplHr69oJpcthToPaNPy8iFeNTNgOT+baPrY5qsigEsog4c/h9gkhr6M7wHzYJXoU7+eH+JF1xzZETSt/TlgQOzG4CDDWOrMfWH7VpbCIciKijdV5jnrT7/5AnVXBEInQD49xgxpjFHTq2hufdUUyuKydPN6x2c2J0r8XjiYFxLbGHsiNrmqh5WnsXc9ey3P5ztM81ODUs9WNTF8uX9MWMmWzSqgJFFLUCn1AWxd0esk6qNUQ==
+        comment: tb@laquadrature.net
+  - user: Porkepix
+    editor: /usr/bin/vim
+    git_author_email: porkepix@laquadrature.net
+    git_author_name: Porkepix
+    keys:
+      - key: ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOTdxSd3nkuMFk4e+NeBu7LQ02qTmOWkzC+Sox8kO1vi
+        comment: Porkepix - old mac key
+      - key: ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIG+3QjfxK8abDDD7u5IQWUAqlz13jhpvfMlxgZDmwA31
+        comment: clement@T470-clement

playbooks/common.yml

+---
+- hosts: all
+  roles:
+     - roles/common

roles/common/defaults/main.yml

+---
+default_editor: /usr/bin/vim

roles/common/tasks/main.yml

+---
+- name: Configure SSH access
+  include: ssh.yml

roles/common/tasks/ssh.yml

+---
+- name: Set authorized_keys2 file
+  template:
+    src: authorized_keys2.j2
+    dest: /root/.ssh/authorized_keys2
+    mode: 0600

roles/common/templates/authorized_keys2.j2

+{% for person in people %}
+{% for k in person['keys'] %}
+environment="SSHCLIENTUSER={{ person['user'] }}",environment="EDITOR={{ person['editor'] | default(default_editor) }}",environment="GIT_AUTHOR_EMAIL={{ person['git_author_email'] }}",environment="GIT_AUTHOR_NAME={{ person['git_author_name'] }}" {{ k['key'] }} {{ k['comment'] }}
+
+{% endfor %}
+{% endfor %}