Cannot install docker on RBPi 3 (strecht) through convenience script

Question

I am trying to install docker on my Raspberry Pi 3

$ cat /etc/os-release 
PRETTY_NAME="Raspbian GNU/Linux 9 (stretch)"
NAME="Raspbian GNU/Linux"
VERSION_ID="9"
VERSION="9 (stretch)"
VERSION_CODENAME=stretch
ID=raspbian
ID_LIKE=debian
HOME_URL="http://www.raspbian.org/"
SUPPORT_URL="http://www.raspbian.org/RaspbianForums"
BUG_REPORT_URL="http://www.raspbian.org/RaspbianBugs"

Following Docker's own guide, I use the convenience script as follows

$ curl -fsSL https://get.docker.com -o get-docker.sh
$ sudo sh get-docker.sh

But the installation does not complete. Instead, I get this error:

# Executing docker install script, commit: 26ff363bcf3b3f5a00498ac43694bf1c7d9ce16c
+ sh -c apt-get update -qq >/dev/null
W: GPG error: http://httpredir.debian.org/debian jessie Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7638D0442B90D010 NO_PUBKEY CBF8D6FD518E17E1
W: The repository 'http://httpredir.debian.org/debian jessie Release' is not signed.
E: Failed to fetch http://httpredir.debian.org/debian/dists/jessie/main/i18n/Translation-en  Could not open file /var/lib/apt/lists/partial/httpredir.debian.org_debian_dists_jessie_main_i18n_Translation-en.bz2 - open (13: Permission denied) [IP: 151.101.114.133 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.

Any idea how I could solve this?

EDIT 1: I am not sure the problem lays in the install script, becuase if I run sudo apt-get update I get a similar error (I added the "[--->]" for clarity)

Reading package lists... Done
W: GPG error: http://httpredir.debian.org/debian jessie Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7638D0442B90D010 NO_PUBKEY CBF8D6FD518E17E1
[--->] W: The repository 'http://httpredir.debian.org/debian jessie Release' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
N: Skipping acquire of configured file 'main/binary-armhf/Packages' as repository 'https://dl.packager.io/srv/deb/opf/openproject/stable/10/debian 9 InRelease' doesn't support architecture 'armhf'
[--->] E: Failed to fetch http://httpredir.debian.org/debian/dists/jessie/main/i18n/Translation-en  Could not open file /var/lib/apt/lists/partial/httpredir.debian.org_debian_dists_jessie_main_i18n_Translation-en.bz2 - open (13: Permission denied) [IP: 151.101.114.133 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.

Answer 1

You are using Raspbian Stretch but the installation script uses the repository of Raspbian Jessie. This cannot work.

You have to use an installation script for Stretch or modify yours to use the repository of Stretch. I don't know if this can be done easily.

By the way, Raspbian Jessie is deprecated since years and out of any support since 2020-01-01. Its repository has been moved to the archive repositories.

Answer 2

The problem was not the script but apt update

I solved it by 1) installing debian-archive-keyring[*]

sudo apt-get install debian-archive-keyring

And 2) removing the contents of /var/lib/apt/lists and /var/lib/apt/lists/partial

cd /var/lib/apt/lists
sudo rm *

## this will only remove files in the folder, but will not touch the partial folder, which needs to be accessed as root

su
root@****:/var/lib/apt# cd partial
root@****:/var/lib/apt/lists/partial# rm *
exit

# after that I just ran
sudo apt update

[*]I am not sure this step is necessary but since I did it I wanted to include it for clarity