c4: License package "license:v8-byol" is cleaned up after an update

Detail name	Value
Changelog Number	20984
Type	Bug
Status	Resolved
Affected Versions	Exasol 8.28.0
Fix Versions	Exasol 8.28.4
Resolution Date	2024-06-25

Description

When database is updated to version 8.28.0 or newer, then system will not start after further subsequent c4 services restarts.

In c4 ps output nodes will stay in stage b1.

The command

sudo journalctl -u c4_cloud_command

will be containing error

Failed to run ('c4', 'fetch', '@license:v8-byol')

The problem applies only to On-Prem installations and AWS installations without internet access or access to AWS metadata service.

Workaround

Execute the following commands on every node:

mkdir -p ~/.ccc/x/u/branchr/v8-byol-20230601

touch ~/.ccc/x/u/branchr/v8-byol-20230601/.exasol-build.json

touch ~/.ccc/x/u/branchr/v8-byol-20230601/.synced

echo '{"Alias":"branchr-v8-byol-20230601","BuildID":"99273163-b563-408f-8bba-e81d96946a74","UUID":"343bb4e7-0735-448c-83d1-b240ca3d4e1d","Arch":"linux-amd64","Compile-Type":"release","Date-Epoch":1685641991,"Date":"Thu, 01 Jun 2023 19:53:11 CEST","Environment":"standard","Last-Revision":"e54f9c1745320e2951d10dd3c36f1abd7670fcd7","Local-Linkdir":"/x/u/branchr/v8-byol-20230601","Prefix":"release","Provides":["saas "],"Server-Port":13004,"Server":"ws64-2.dev.exasol.com","Target-System":"linux-x86_64-fedora-28","User":"branchr"}' > ~/.ccc/x/u/branchr/v8-byol-20230601.json

echo "branchr-v8-byol-20230601" > ~/.ccc/x/.registry/tag/license:v8-byol

and then restart:

sudo systemctl restart c4_cloud_command --no-block

Fix

c4 no longer cleans up the Exasol license package during an update.