Synology Update to 7.2, Deinstallation of PACS fails

[Rainer Egle]

After update to 7.2, I figured that Docker is not longer supported. Can't deinstall Docker, can't deinstall DCM4CHE. Logfile: Failed to uninstall package. [PACS]

Needless to say, that repair does not work either. How can I install PACS manually? 

Regards,

Rainer

[Lubo]

I had issues installing PACS ever since upgrading to DSM 7, which broke the PACS package upgradability. The lack of PACS support for Synology left the issue unresolved for years. The Docker deprecation just added to the queue of problems I needed to resolve, but I hadn't had time to investigate further until now. Since I couldn't find much help online, I decided to document my solution here.

Step 1: Enable SSH Access

To troubleshoot effectively, you need SSH access to your Synology NAS:

1. Open the Control Panel in DSM.

2. Navigate to Terminal & SNMP.

3. Check Enable SSH service (port 22) and apply changes.

Step 2: Connect via SSH

Using a Windows command prompt (or terminal on Linux/Mac), connect to your NAS:

ssh <your-NAS-IP>

Enter your root password when prompted.

Step 3: Attempt Uninstallation

Run the following command to uninstall PACS:

sudo synopkg uninstall PACS

If the uninstall fails, you might see an error message like:

{"action":"prepare","error":{"code":314,"description":"failed to run preuninst script"},"stage":"prepare","success":false}

This means there’s a script issue blocking the uninstallation.

Step 4: Locate the Uninstall Scripts

Navigate to the package scripts directory:

cd /var/packages/PACS/scripts

If you encounter missing environment variables, define them manually. For example, set DCM4CHEE_SHARE_LINK:

export DCM4CHEE_SHARE_LINK=/volume1/pacs

Verify the variable is set correctly:

echo $DCM4CHEE_SHARE_LINK

This should return:

/volume1/pacs

Step 5: Fix Missing Config Files

Check if the config folder exists inside /var/packages/PACS/etc:

ls -al /var/packages/PACS/etc/

If the config folder is missing, create it from backup_config:

cp /var/packages/PACS/etc/backup_config /var/packages/PACS/etc/config

chmod 644 /var/packages/PACS/etc/config

Verify the permissions:

ls -al /var/packages/PACS/etc/

Expected output:

drwxr-xr-x 1 root root   38 Feb 17 15:28 .

drwxr-xr-x 1 root root 1226 Jan 20 11:13 ..

-rw-r--r-- 1 root root  203 Jun 24  2022 backup_config

-rw-r--r-- 1 root root  203 Feb 17 15:28 config

Step 6: Retry Uninstallation

Once the config issue is resolved, run the uninstall command again:

sudo synopkg uninstall PACS

If successful, you should see:

{"action":"prepare","error":{"code":0},"stage":"prepare","success":true}

Step 7: Close SSH and Disable SSH Access

Exit the SSH session:

exit

Then, disable SSH in DSM for security purposes:

1. Open Control Panel in DSM.

2. Navigate to Terminal & SNMP.

3. Uncheck Enable SSH service.

This should successfully uninstall PACS, allowing you to proceed with a fresh installation if needed. If you have any additional issues, feel free to comment below!