Installation failed on Raspberry Pi

[svintuss]

Hi. I'm stuck with a weird "Failed to add repository" error on Raspberry Pi running Raspberry Pi OS:

TASK [common : Check apparmor support] *********************************************************************************
fatal: [localhost]: FAILED! => {"changed": false, "cmd": ["apparmor_status"], "delta": "0:00:00.009626", "end": "2021-10-23 17:20:14.950696", "msg": "non-zero return code", "rc": 3, "start": "2021-10-23 17:20:14.941070", "stderr": "apparmor filesystem is not mounted.", "stderr_lines": ["apparmor filesystem is not mounted."], "stdout": "apparmor module is loaded.", "stdout_lines": ["apparmor module is loaded."]}
...ignoring

TASK [common : Define facts] *******************************************************************************************
ok: [localhost]

TASK [common : Set facts] **********************************************************************************************
ok: [localhost]

TASK [common : Set IPv6 support as a fact] *****************************************************************************
ok: [localhost]

TASK [common : Check size of MTU] **************************************************************************************
ok: [localhost]

TASK [common : Set OS specific facts] **********************************************************************************
ok: [localhost]

TASK [common : Install tools] ******************************************************************************************
ok: [localhost]
included: /home/pi/algo/roles/common/tasks/iptables.yml for localhost

TASK [common : Iptables configured] ************************************************************************************
ok: [localhost] => (item={'src': 'rules.v4.j2', 'dest': '/etc/iptables/rules.v4'})

TASK [common : Sysctl tuning] ******************************************************************************************
ok: [localhost] => (item={'item': 'net.ipv4.ip_forward', 'value': 1})
ok: [localhost] => (item={'item': 'net.ipv4.conf.all.forwarding', 'value': 1})
included: /home/pi/algo/roles/dns/tasks/ubuntu.yml for localhost
FAILED - RETRYING: Add the repository (10 retries left).
FAILED - RETRYING: Add the repository (9 retries left).
FAILED - RETRYING: Add the repository (8 retries left).
FAILED - RETRYING: Add the repository (7 retries left).
FAILED - RETRYING: Add the repository (6 retries left).
FAILED - RETRYING: Add the repository (5 retries left).
FAILED - RETRYING: Add the repository (4 retries left).
FAILED - RETRYING: Add the repository (3 retries left).
FAILED - RETRYING: Add the repository (2 retries left).
FAILED - RETRYING: Add the repository (1 retries left).

TASK [dns : Add the repository] ****************************************************************************************
fatal: [localhost]: FAILED! => {"attempts": 10, "changed": false, "msg": "apt cache update failed"}
included: /home/pi/algo/playbooks/rescue.yml for localhost

TASK [debug] ***********************************************************************************************************
ok: [localhost] => {
    "fail_hint": [
        "Sorry, but something went wrong!",
        "Please check the troubleshooting guide.",
        "https://trailofbits.github.io/algo/troubleshooting.html"
    ]
}

TASK [Fail the installation] *******************************************************************************************
fatal: [localhost]: FAILED! => {"changed": false, "msg": "Failed as requested from task"}

PLAY RECAP *************************************************************************************************************
localhost                  : ok=51   changed=2    unreachable=0    failed=1    skipped=25   rescued=1    ignored=1   

Is there anything I can do?

[davidemyers]

You chose the option:

Install to existing Ubuntu 18.04 or 20.04 server (for more advanced users)

But Raspberry Pi OS is not Ubuntu Server.

[svintuss]

I mean, Algo scripts won't work on Raspberry OS / Debian and there is no means to overcome that?

[davidemyers]

As mentioned in Local Installation, Algo only supports converting newly installed instances of Ubuntu Server 18.04 and 20.04 into VPN servers. You can run the Algo scripts on other operating systems to deploy remotely to a supported cloud provider or to a remote system you created yourself.

You can run Ubuntu Server 20.04 on a Raspberry Pi.

[dpreviti]

Don't listen to other poster, I've been using algo to install a VPN on Debian for years now even though it's only advertised for Ubuntu.

1. In /home/pi/algo/roles/dns/tasks/ubuntu.yml
   REM out (add # to the beginning of the lines) the following lines. One installs the repo the other installs the package. these lines, sorry I can't get the sight to not bold my example.

• name: Add the repository
  apt_repository:
  state: present
  codename: "{{ ansible_distribution_release }}"
  repo: ppa:shevchuk/dnscrypt-proxy
  register: result
  until: result is succeeded
  retries: 10
  delay: 3

• name: Install dnscrypt-proxy
  apt:
  name: dnscrypt-proxy
  state: present
  update_cache: true"

Then run
sudo apt install dnscrypt-proxy

To make sure the package you need is installed and run your algo script again.

GOOD LUCK!