microstack/snap/hooks/install

#!/bin/bash
set -ex


# Initialize config
set-default-config

# TODO(dmitriis): disable other services and only enable them once the
# prerequisites are met instead of allowing snapd to start them and make them fail.
# snapd starts all non-disabled services by default which may lead to errors such as
# a module loading error in case of ovs-vswitchd. The sequence is as follows:
# 1. The snap is installed;
# 2. Non-disabled services are started;
# 3. Interfaces that do not have auto-connection enabled are manually connected by
#    an operator (connecting openvswitch-support loads the openvswitch kernel module
#    but auto-connection is not enabled for openvswitch-support).
snapctl stop --disable $SNAP_INSTANCE_NAME.ovsdb-server
snapctl stop --disable $SNAP_INSTANCE_NAME.ovn-ovsdb-server-sb
snapctl stop --disable $SNAP_INSTANCE_NAME.ovn-ovsdb-server-nb
snapctl stop --disable $SNAP_INSTANCE_NAME.ovs-vswitchd
snapctl stop --disable $SNAP_INSTANCE_NAME.ovn-northd
snapctl stop --disable $SNAP_INSTANCE_NAME.ovn-controller

snapctl stop --disable $SNAP_INSTANCE_NAME.iscsid
snapctl stop --disable $SNAP_INSTANCE_NAME.target

# No meaningful default backend is available yet.
snapctl stop --disable $SNAP_INSTANCE_NAME.cinder-backup
# Will only be enabled based on the answers during initialization.
snapctl stop --disable $SNAP_INSTANCE_NAME.setup-lvm-loopdev
# Will only be enabled if a backend is chosen to be configured by the user.
snapctl stop --disable $SNAP_INSTANCE_NAME.cinder-volume


mkdir -p $SNAP_DATA/lib/libvirt/images
mkdir -p ${SNAP_COMMON}/log/libvirt/qemu
# NOTE(dmitriis): there is currently no way to make sure this directory gets
# recreated on reboot which would normally be done via systemd-tmpfiles.
mkdir -p /run/lock/snap.$SNAP_INSTANCE_NAME

# Copy TEMPLATE.qemu into the common directory. Libvirt generates additional
# policy dynamically which is why its apparmor directory is writeable under $SNAP_COMMON.
# Also copy other abstractions that are used by this template.
rsync -rh $SNAP/etc/apparmor.d $SNAP_COMMON/etc

# MySQL snapshot for speedy install
# snapshot is a mysql data dir with
# rocky keystone,nova,glance,neutron dbs.
mkdir -p ${SNAP_COMMON}/lib

# Put cirros (and potentially other) images in a user writeable place.
mkdir -p ${SNAP_COMMON}/images
cp ${SNAP}/images/* ${SNAP_COMMON}/images/

# Install conf.d configuration from snap for db etc
echo "Installing configuration for OpenStack Services"
for project in neutron nova keystone glance; do
    mkdir -p ${SNAP_COMMON}/etc/${project}/${project}.conf.d
    cp -r ${SNAP}/etc/${project}/${project}.conf.d/* ${SNAP_COMMON}/etc/${project}/${project}.conf.d || true # Skip conf files that have been moved into templates
done
# Make a place for our horizon config overrides to live
mkdir -p ${SNAP_COMMON}/etc/horizon/local_settings.d

# ----- OVN -----
# Lay out directories used for OVN configuration and persistent data
for dir in etc/ovn var/lib/ovn var/log/ovn var/run/ovn; do
    if [ ! -d $SNAP_COMMON/$dir ]; then
        mkdir -p $SNAP_COMMON/$dir
    fi
done

# Prepare access to the hosting systems Open vSwitch instance
# NOTE end user must execute `snap connect ovn:openvswitch` for this to work
ln -s /var/run/openvswitch $SNAP_COMMON/var/run/openvswitch

# The `ovn-ctl` script does not have enough knobs for useful tailoring of
# execution of the `ovn-northd` daemon.  Instead it provides a file to pass
# arguments directly to the `ovn-northd` process.
#
# We fill the `args_northd` with necessary defaults and link to the file
# `ovn-ctl` looks for.
#
# For other daemons the corrensponding args_* file is used to pass arguments to
# `ovn-ctl`.
cat << EOF > $SNAP_COMMON/args_northd
--ovnnb-db=unix:$SNAP_COMMON/run/ovn/ovnnb_db.sock
--ovnsb-db=unix:$SNAP_COMMON/run/ovn/ovnsb_db.sock
EOF
ln -s $SNAP_COMMON/args_northd $SNAP_COMMON/etc/ovn/ovn-northd-db-params.conf
# ----- END OVN -----

snap-openstack setup  # Sets up templates for the first time.