I have a script that uses rclone to download a file. Unfortunately executing the script hangs when the rclone command is executed:
postgresPostStartScript = ''
#!/bin/bash
export PATH=${pkgs.rclone}/bin:${pkgs.coreutils}/bin:${pkgs.findutils}/bin:${pkgs.gnugrep}/bin:${pkgs.gnused}/bin:${pkgs.gnutar}/bin:${pkgs.gzip}/bin:${pkgs.util-linux}/bin:${config.services.postgresql.package}/bin:$PATH
...
# script hangs here when executed via systemd
echo "Downloading dump file..."
${pkgs.rclone}/bin/rclone copyto \
-vv \
--config "/etc/rclone.conf" \
hetzner-s3:my-bucket/db.dump \
"$DUMP_FILE"
echo "downloaded dump file"
fi
...
'';
postgresql-poststart-script = pkgs.writeScriptBin "postgresql-poststart-script" postgresPostStartScript;
The systemd service definition is as follows:
systemd.services.postgresql-poststart = {
description = "PostgreSQL Post-Start Actions";
after = [ "postgresql.service" ];
wants = [ "postgresql.service" ];
serviceConfig = {
User = "bn";
Group = "bn";
EnvironmentFile = [ "${config.age.secrets.env-secret.path}" ];
Type = "oneshot";
ExecStart = "${pkgs.bash}/bin/bash ${postgresql-poststart-script}/bin/postgresql-poststart-script";
};
#wantedBy = [ "multi-user.target" ];
};
When I run sudo -u bn <environment variables> bash /nix/store/.../bin/postgresql-poststart-script the script runs successfully. I’ve checked that the EnvironmentFile is correctly decrypted by agenix, so that’s not the reason.
All I get when starting the systemd service is the Download dump file... and then it hangs. Does anybody have an idea of what could go wrong here? Also is it possible to flush the actual output of the rclone command to journal somehow? I’ve tried prepending ${pkgs.coreutils}/bin/stdbuf -oL -eL to the rclone command, but with no success.