Sipwise NGCP introduced Maintenance Mode with its mr5.4.1 release. The maintenance mode of NGCP 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.

Enable maintenance mode:

general:
  maintenance: yes

Disabling background services. These tasks are for systems currently running NGCP release older than mr5.4.1. The maintenance mode of NGCP is not available in your system prior to the software upgrade. It is therefore necessary to manually disable the following background services to avoid a potential system inconsistency:

Execute the following:

Please don’t forget to reverse the manual changes after the software upgrade as described in Enabling background services section of the handbook!

For all NGCP systems, regardless of their version:

Apply configuration changes by executing :

ngcpcfg apply 'Enabling maintenance mode before the upgrade to mr5.5.6'

These commands are for systems currently running previous LTS release mr4.5.*

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}->mr5.5.6
deb https://debian.sipwise.com/debian/ jessie main contrib non-free
#deb-src https://debian.sipwise.com/debian/ jessie main contrib non-free
#
deb https://debian.sipwise.com/debian-security/ jessie-security main contrib non-free
#deb-src https://debian.sipwise.com/debian-security/ jessie-security main contrib non-free
#
deb https://debian.sipwise.com/debian/ jessie-updates main contrib non-free
#deb-src https://debian.sipwise.com/debian/ jessie-updates 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 ${NGCP_CURRENT_VERSION}->mr5.5.6
deb https://deb.sipwise.com/spce/${NGCP_CURRENT_VERSION}/ jessie main
#deb-src https://deb.sipwise.com/spce/${NGCP_CURRENT_VERSION}/ jessie main
EOF

These commands are for systems currently running previous build mr5.5.*

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}->mr5.5.6
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 ${NGCP_CURRENT_VERSION}->mr5.5.6
deb https://deb.sipwise.com/spce/${NGCP_CURRENT_VERSION}/ stretch main
#deb-src https://deb.sipwise.com/spce/${NGCP_CURRENT_VERSION}/ stretch main
EOF

Run "apt-get update" and ensure you have no warnings/errors here.

To upgrade the sip:provider CE to release mr5.5.6, execute the following commands:

NGCP_CURRENT_VERSION=$(cat /etc/ngcp_version)
sed -i "s/$NGCP_CURRENT_VERSION/mr5.5.6/" /etc/apt/sources.list.d/sipwise.list
sed -i "s/jessie/stretch/g" /etc/apt/sources.list.d/sipwise.list /etc/apt/sources.list.d/debian.list
grep -q "debian-debug" /etc/apt/sources.list.d/debian.list || \
  echo "deb https://debian.sipwise.com/debian-debug/ stretch-debug main contrib non-free" >> /etc/apt/sources.list.d/debian.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"

Enabling background services. If you upgraded from NGCP release earlier than mr5.4.1, you have to manually reverse the changes you applied before the upgrade in the (Disabling background services) section.

For all NGCP systems, regardless of their previous version:

ngcpcfg apply 'Disable the maintenance mode after the upgrade to mr5.5.6'

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.