discourse_docker リポジトリに基づいて、Vagrant マシン内でそれを使用するための自動化スクリプトを少し書きました（実際に何が行われているかを確認するには set -x で実行してください）
バックアップを間違った場所にコピーしてしまいましたか？
また、以下のログ行
Making sure /var/www/discourse/tmp/restores/default/2020-05-13-190832 exists...
の意味は何ですか？
~/infra/discourse on master! ⌚ 21:14:07
$ pwd
/home/pihentagy/infra/discourse
~/infra/discourse on master! ⌚ 21:01:14
$ ./wl.sh start
+ set -e
+ VAGRANT_MACHINE_NAME=guest
+ cd discourse
+ case "$1" in
+ init
+ printf 'Checking out and updating repo…\n'
Checking out and updating repo…
+ cd ..
+ git clone https://github.com/discourse/discourse_docker.git discourse
fatal: destination path 'discourse' already exists and is not an empty directory.
+ printf 'Repo already there\n'
Repo already there
+ cd discourse
+ printf 'Updating repo…\n'
Updating repo…
+ git pull -r
remote: Enumerating objects: 6, done.
remote: Counting objects: 100% (6/6), done.
remote: Compressing objects: 100% (4/4), done.
remote: Total 6 (delta 2), reused 5 (delta 2), pack-reused 0
Unpacking objects: 100% (6/6), done.
From https://github.com/discourse/discourse_docker
3e465a2..49ed141 master -> origin/master
Created autostash: 36aae80
HEAD is now at 3e465a2 Remove all pg12 traces so pg_wrapper doesn't get confused
First, rewinding head to replay your work on top of it...
Fast-forwarded master to 49ed14152971f7f4a7437657987952be44c33c0a.
Applying autostash resulted in conflicts.
Your changes are safe in the stash.
You can run "git stash pop" or "git stash drop" at any time.
+ printf 'Copying config file…\n'
Copying config file…
+ cp ../resources/discourse.yml containers/
+ echo 'Starting Vagrant machine...'
Starting Vagrant machine...
+ vagrant up
Bringing machine 'dockerhost' up with 'virtualbox' provider...
==> dockerhost: Checking if box 'ubuntu/xenial64' is up to date...
==> dockerhost: Machine already provisioned. Run `vagrant provision` or use the `--provision`
==> dockerhost: flag to force provisioning. Provisioners marked to run always will still run.
+ vagrant ssh -c 'cd /vagrant;sudo ./launcher start discourse'
2627afdfbaac
Nothing to do, your container has already started!
Connection to 127.0.0.1 closed.
+ exit 0
~/infra/discourse on master! ⌚ 21:07:56
$ ./wl.sh restore /home/pihentagy/infra/icontest-2020-05-12-033823-v20200506044956.tar.gz
+ set -e
+ VAGRANT_MACHINE_NAME=guest
+ cd discourse
+ case "$1" in
+ shift
+ backup=/home/pihentagy/infra/icontest-2020-05-12-033823-v20200506044956.tar.gz
+ discourse_backup_dir=shared/standalone/backups/default
+ mkdir --parents shared/standalone/backups/default
+ rsync -P --verbose /home/pihentagy/infra/icontest-2020-05-12-033823-v20200506044956.tar.gz shared/standalone/backups/default
icontest-2020-05-12-033823-v20200506044956.tar.gz
390,774,609 100% 317.41MB/s 0:00:01 (xfr#1, to-chk=0/1)
sent 390,870,133 bytes received 35 bytes 156,348,067.20 bytes/sec
total size is 390,774,609 speedup is 1.00
+ vagrant ssh -c 'sudo docker exec -w /var/www/discourse -i discourse discourse enable_restore'
Restore are now permitted. Disable them with `disable_restore`
Connection to 127.0.0.1 closed.
+ vagrant ssh -c 'sudo docker exec -w /var/www/discourse -i discourse discourse restore'
You must provide a filename to restore. Did you mean one of the following?
Connection to 127.0.0.1 closed.
+ vagrant ssh -c 'sudo docker exec -w /var/www/discourse -i discourse discourse restore icontest-2020-05-12-033823-v20200506044956.tar.gz'
Starting restore: icontest-2020-05-12-033823-v20200506044956.tar.gz
[STARTED]
'system' has started the restore!
Marking restore as running...
Making sure /var/www/discourse/tmp/restores/default/2020-05-13-190832 exists...
Copying archive to tmp directory...
EXCEPTION: lib/discourse.rb:90:in `exec': Failed to copy archive to tmp directory.
cp: cannot stat '/var/www/discourse/public/backups/default/icontest-2020-05-12-033823-v20200506044956.tar.gz': No such file or directory
lib/discourse.rb:100:in `execute_command'
lib/discourse.rb:90:in `exec'
lib/discourse.rb:40:in `execute_command'
/var/www/discourse/lib/backup_restore/local_backup_store.rb:42:in `download_file'
/var/www/discourse/lib/backup_restore/backup_file_handler.rb:61:in `copy_archive_to_tmp_directory'
/var/www/discourse/lib/backup_restore/backup_file_handler.rb:21:in `decompress'
/var/www/discourse/lib/backup_restore/restorer.rb:42:in `run'
script/discourse:143:in `restore'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/thor-1.0.1/lib/thor/command.rb:27:in `run'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/thor-1.0.1/lib/thor/invocation.rb:127:in `invoke_command'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/thor-1.0.1/lib/thor.rb:392:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/thor-1.0.1/lib/thor/base.rb:485:in `start'
script/discourse:284:in `<top (required)>'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:63:in `load'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:63:in `kernel_load'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:28:in `run'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/cli.rb:476:in `exec'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor.rb:399:in `dispatch'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/cli.rb:30:in `dispatch'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/base.rb:476:in `start'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/cli.rb:24:in `start'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/exe/bundle:46:in `block in <top (required)>'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/friendly_errors.rb:123:in `with_friendly_errors'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/exe/bundle:34:in `<top (required)>'
/usr/local/bin/bundle:23:in `load'
/usr/local/bin/bundle:23:in `<main>'
Trying to rollback...
There was no need to rollback
Cleaning stuff up...
Removing tmp '/var/www/discourse/tmp/restores/default/2020-05-13-190832' directory...
Unpausing sidekiq...
Marking restore as finished...
Notifying 'system' of the end of the restore...
Finished!
[FAILED]
Restore done.
Connection to 127.0.0.1 closed.
+ vagrant ssh -c 'sudo docker exec -w /var/www/discourse -i discourse discourse restore'
You must provide a filename to restore. Did you mean one of the following?
Connection to 127.0.0.1 closed.
+ vagrant ssh -c 'sudo docker exec -w /var/www/discourse -i discourse discourse restore icontest-2020-05-12-033823-v20200506044956.tar.gz'
Starting restore: icontest-2020-05-12-033823-v20200506044956.tar.gz
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