deploy ssh key from master to minion via salt pillars

Solution 1:

The Salt Pillar system does not have an init.sls file. Both states and pillars has a top.sls file. States that are subdirectories may have an init.sls file.

Step 1: Define your users in /srv/pillar/users.sls

users:

  - name: fred
    fullname: Fred Flintstone
    email: [email protected]
    uid: 4001
    gid: 4001
    shell: /bin/bash
    groups:
      - bowling
    shadow: $6$Sasdf/Ss$asdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfsadfasdfsadfsadfsdf
    authkey: ssh-dss AAAAasdfasdfsadfsadfsadfsadfasdfasdfsdafsdafaasdfasdfasdfasdfasdfsadfsadfsadfsadfasdfasdfsdafsdafaasdfasdfasdfasdfasdfsadfsadfsadfsadfasdfasdfsdafsdafaasdfasdfasdfasdfasdfsadfsadfsadfsadfasdfasdfsdafsdafa = [email protected]
    sshpub: ssh-dss AAAAasdfasdfsadfsadfsadfsadfasdfasdfsdafsdafaasdfasdfasdfasdfasdfsadfsadfsadfsadfasdfasdfsdafsdafaasdfasdfasdfasdfasdfsadfsadfsadfsadfasdfasdfsdafsdafaasdfasdfasdfasdfasdfsadfsadfsadfsadfasdfasdfsdafsdafa = [email protected]

  - name: barney
    fullname: Barney Rubble
    email: [email protected]
    uid: 4002
    gid: 4002
    shell: /bin/bash
    groups:
      - bowling
    shadow: $6$Suiop/Ss$uiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopsadfuiopsadfsadfsdf
    authkey: ssh-dss AAAAuiopuiopsadfsadfsadfsadfuiopuiopsdafsdafauiopuiopuiopuiopuiopsadfsadfsadfsadfuiopuiopsdafsdafauiopuiopuiopuiopuiopsadfsadfsadfsadfuiopuiopsdafsdafauiopuiopuiopuiopuiopsadfsadfsadfsadfuiopuiopsdafsdafa = [email protected]
    sshpub: ssh-dss AAAAuiopuiopsadfsadfsadfsadfuiopuiopsdafsdafauiopuiopuiopuiopuiopsadfsadfsadfsadfuiopuiopsdafsdafauiopuiopuiopuiopuiopsadfsadfsadfsadfuiopuiopsdafsdafauiopuiopuiopuiopuiopsadfsadfsadfsadfuiopuiopsdafsdafa = [email protected]

Step 2: Add the new pillar to /srv/pillar/top.sls

base:
  'testminion':
    - users

Step 3: Use jinja to map pillar to states in /srv/salt/user/init.sls

{% for user in pillar['users'] %}
user_{{user.name}}:
  group.present:
    - name: {{user.name}}
    - gid: {{user.gid}}

  user.present:
    - name: {{user.name}}
    - fullname: {{user.fullname}}
    - password: {{user.shadow}}
    - shell: {{user.shell}}
    - uid: {{user.uid}}
    - gid: {{user.gid}}
    {% if user.groups %}
    - optional_groups:
      {% for group in user.groups %}
      - {{group}}
      {% endfor %}
    {% endif %}
    - require:
      - group: user_{{user.name}}

  file.directory:
    - name: /home/{{user.name}}
    - user: {{user.name}}
    - group: {{user.name}}
    - mode: 0751
    - makedirs: True

user_{{user.name}}_forward:
  file.append:
    - name: /home/{{user.name}}/.forward
    - text: {{user.email}}

user_{{user.name}}_sshdir:
  file.directory:
    - name: /home/{{user.name}}/.ssh
    - user: {{user.name}}
    - group: {{user.name}}
    - mode: 0700

{% if 'authkey' in user %}
user_{{user.name}}_authkeys:
  ssh_auth.present:
    - user: {{user.name}}
    - name: {{user.authkey}}
{% endif %}

{% if 'sshpriv' in user %}
user_{{user.name}}_sshpriv:
  file.managed:
    - name: /home/{{user.name}}/.ssh/id_rsa
    - user: {{user.name}}
    - group: {{user.name}}
    - mode: 0600
    - contents_pillar: {{user.sshpriv}}
{% endif %}

{% if 'sshpub' in user %}
user_{{user.name}}_sshpub:
  file.managed:
    - name: /home/{{user.name}}/.ssh/id_rsa.pub
    - user: {{user.name}}
    - group: {{user.name}}
    - mode: 0600
    - contents_pillar: {{user.sshpub}}
{% endif %}
{% endfor %} # user in users
# vim: ft=yaml tabstop=2 sts=2 sw=2 et ai si

Don't forget to sync the minions with the new pillars!

salt targetminions saltutil.refresh_pillar

Solution 2:

It should probably be noted that in relation to the original question, there's another simple solution if source: salt://... format doesn't work with file.managed - as it still happened with salt-ssh because of bug https://github.com/saltstack/salt/issues/38458 that was since fixed - and that is to switch to contents: with the file tree external pillar, which is also backed by files on the master.

The file_tree ext_pillar is documented at https://docs.saltstack.com/en/latest/ref/pillar/all/salt.pillar.file_tree.html#module-salt.pillar.file_tree nowadays. It has existed since version 2015.5.0 so it's newer than the original question and answer, yet it is a solution that is reasonably well available today.

Indeed, it is also in the FAQ at https://docs.saltstack.com/en/latest/faq.html#is-it-possible-to-deploy-a-file-to-a-specific-minion-without-other-minions-having-access-to-it