Run the terminal multiplexer under the sipwise user (to reuse the Sipwise .screenrc settings that are convenient for working in multiple windows):

screen -S ngcp-pre-upgrade-checks

Become root inside your screen session:

sudo -s

Check the overall system status:

ngcp-status --all

For the below steps, investigate and make sure you understand why the custom modifications were introduced and if they are still required after the software upgrade. If the custom modifications are not required anymore, remove them (e.g. if a bug was fixed in the target release and the existing patch becomes irrelevant).

Find the local changes to the template files:

ngcp-customtt-diff-helper

The script will also ask you if you would like to download the templates for your target release. To download the new templates separately, execute:

ngcp-customtt-diff-helper -d

In the tmp folder provided by the script, you can merge the current customtt with the new tt2 templates, creating the new customtt.tt2 files. Once this is done, archive the new customtt files to deploy the new templates after the software upgrade:

ngcp-customtt-diff-helper -t

Find all available script options with the "-h" parameter.

Check if there are any *.tt2.dpkg-dist files among the templates. They usually appear when tt2 files are modified directly instead of creating customtt files. If you find any *.tt2.dpkg-dist files, treat the corresponding tt2 files as if they were customtt.tt2 and introduce the changes from the existing tt2 files into the new templates (create associated *.customtt.tt2) before the software upgrade.

find /etc/ngcp-config -name \*.tt2.dpkg-dist

Note that in the end all *.tt2.dpkg-dist files must be removed before the software upgrade as they prevent the upgrade script from updating the tt2 files.

Check and remove dpkg files left from previous software upgrades.

Make sure that the list is empty before you continue:

find /etc/ngcp-config -name \*.tt2.dpkg\*

Changes made directly in tt2 templates will be lost after the software upgrade. Only custom changes made in customtt.tt2 files will be kept. Hence, check the system for locally modified tt2 files on all nodes:

ngcp-status --integrity

Check the configuration framework status on all nodes. All checks must show the "OK" result and there must be no actions required:

ngcpcfg status

Run "apt-get update" and ensure that you do not have any warnings and errors in the output.

Sipwise C5 introduces Maintenance Mode with its mr5.4.1 release. The maintenance mode of Sipwise C5 will disable some background services (for instance: mediator) during the software upgrade. It thus prevents the system from getting into an inconsistent state while the upgrade is being performed. You can activate maintenance mode by applying a simple configuration change as described later.

ngcpcfg set /etc/ngcp-config/config.yml "general.maintenance=yes"

ngcpcfg apply 'Enabling maintenance mode before the upgrade to mr6.4.2'

Execute the following commands as root:

echo "# Please visit /etc/apt/sources.list.d/ instead." > /etc/apt/sources.list

mkdir -p /etc/apt/sources.list.d
for file in /etc/apt/sources.list.d/*.list ; do mv "${file}" "${file}.DISABLED" ; done

NGCP_CURRENT_VERSION=$(cat /etc/ngcp_version)
cat > /etc/apt/sources.list.d/debian.list << EOF
# Debian repositories, deployed via upgrade ${NGCP_CURRENT_VERSION}->mr6.4.2
deb https://debian.sipwise.com/debian/ stretch main contrib non-free
#deb-src https://debian.sipwise.com/debian/ stretch main contrib non-free
#
deb https://debian.sipwise.com/debian-security/ stretch-security main contrib non-free
#deb-src https://debian.sipwise.com/debian-security/ stretch-security main contrib non-free
#
deb https://debian.sipwise.com/debian/ stretch-updates main contrib non-free
#deb-src https://debian.sipwise.com/debian/ stretch-updates main contrib non-free

deb https://debian.sipwise.com/debian-debug/ stretch-debug main contrib non-free
#deb-src https://debian.sipwise.com/debian-debug/ stretch-debug main contrib non-free
EOF

NGCP_CURRENT_VERSION=$(cat /etc/ngcp_version)
cat > /etc/apt/sources.list.d/sipwise.list << EOF
# NGCP_MANAGED_FILE
# Sipwise repository, deployed via upgrade ${NGCP_CURRENT_VERSION}->mr6.4.2
deb https://deb.sipwise.com/spce/${NGCP_CURRENT_VERSION}/ stretch main
#deb-src https://deb.sipwise.com/spce/${NGCP_CURRENT_VERSION}/ stretch main
EOF

To upgrade Sipwise C5 to release mr6.4.2, execute the following commands:

NGCP_CURRENT_VERSION=$(cat /etc/ngcp_version)
sed -i "s/${NGCP_CURRENT_VERSION}/mr6.4.2/" /etc/apt/sources.list.d/sipwise.list


apt-get update
apt-get install ngcp-upgrade-ce

Run the upgrade script as root like this:

ngcp-upgrade

The upgrade script will ask you to confirm that you want to start. Read the given information carefully, and if you agree, proceed with y.

The upgrade process will take several minutes, depending on your network connection and server performance. After everything has been updated successfully, it will finally ask you to reboot your system. Confirm to let the system reboot (it will boot with an updated kernel).

Once up again, double-check your config file /etc/ngcp-config/config.yml (sections will be rearranged now and will contain more parameters) and your domain/subscriber/peer configuration and test the setup.

In order to disable the maintenance mode, do the following:

ngcpcfg set /etc/ngcp-config/config.yml "general.maintenance=no"

ngcpcfg apply 'Disable the maintenance mode after the upgrade to mr6.4.2'

When everything has finished successfully, check that replication is running. Check ngcp-status. Finally, do a basic functionality test. Check the web interface, register two test subscribers and perform a test call between them to ensure call routing works.

ngcp-update

Merge/add the custom configuration templates if needed.

Apply the changes to configuration templates:

ngcpcfg apply 'applying customtt after installing the latest packages'

Execute the final checks as described in the Post-upgrade checks section.