| # lib/rpc_backend |
| # Interface for interactig with different rpc backend |
| # rpc backend settings |
| |
| # Dependencies: |
| # |
| # - ``functions`` file |
| # - ``RABBIT_{HOST|PASSWORD}`` must be defined when RabbitMQ is used |
| |
| # ``stack.sh`` calls the entry points in this order: |
| # |
| # - check_rpc_backend |
| # - install_rpc_backend |
| # - restart_rpc_backend |
| # - iniset_rpc_backend |
| |
| # Save trace setting |
| XTRACE=$(set +o | grep xtrace) |
| set +o xtrace |
| |
| |
| # Functions |
| # --------- |
| |
| |
| # Make sure we only have one rpc backend enabled. |
| # Also check the specified rpc backend is available on your platform. |
| function check_rpc_backend { |
| local c svc |
| |
| local rpc_needed=1 |
| # We rely on the fact that filenames in lib/* match the service names |
| # that can be passed as arguments to is_service_enabled. |
| # We check for a call to iniset_rpc_backend in these files, meaning |
| # the service needs a backend. |
| rpc_candidates=$(grep -rl iniset_rpc_backend $TOP_DIR/lib/ | awk -F/ '{print $NF}') |
| for c in ${rpc_candidates}; do |
| if is_service_enabled $c; then |
| rpc_needed=0 |
| break |
| fi |
| done |
| local rpc_backend_cnt=0 |
| for svc in qpid zeromq rabbit; do |
| is_service_enabled $svc && |
| ((rpc_backend_cnt++)) |
| done |
| if [ "$rpc_backend_cnt" -gt 1 ]; then |
| echo "ERROR: only one rpc backend may be enabled," |
| echo " set only one of 'rabbit', 'qpid', 'zeromq'" |
| echo " via ENABLED_SERVICES." |
| elif [ "$rpc_backend_cnt" == 0 ] && [ "$rpc_needed" == 0 ]; then |
| echo "ERROR: at least one rpc backend must be enabled," |
| echo " set one of 'rabbit', 'qpid', 'zeromq'" |
| echo " via ENABLED_SERVICES." |
| fi |
| |
| if is_service_enabled qpid && ! qpid_is_supported; then |
| die $LINENO "Qpid support is not available for this version of your distribution." |
| fi |
| } |
| |
| # clean up after rpc backend - eradicate all traces so changing backends |
| # produces a clean switch |
| function cleanup_rpc_backend { |
| if is_service_enabled rabbit; then |
| # Obliterate rabbitmq-server |
| uninstall_package rabbitmq-server |
| sudo killall epmd || sudo killall -9 epmd |
| if is_ubuntu; then |
| # And the Erlang runtime too |
| apt_get purge -y erlang* |
| fi |
| elif is_service_enabled qpid; then |
| if is_fedora; then |
| uninstall_package qpid-cpp-server |
| elif is_ubuntu; then |
| uninstall_package qpidd |
| else |
| exit_distro_not_supported "qpid installation" |
| fi |
| elif is_service_enabled zeromq; then |
| if is_fedora; then |
| uninstall_package zeromq python-zmq redis |
| elif is_ubuntu; then |
| uninstall_package libzmq1 python-zmq redis-server |
| elif is_suse; then |
| uninstall_package libzmq1 python-pyzmq redis |
| else |
| exit_distro_not_supported "zeromq installation" |
| fi |
| fi |
| } |
| |
| # install rpc backend |
| function install_rpc_backend { |
| if is_service_enabled rabbit; then |
| # Install rabbitmq-server |
| install_package rabbitmq-server |
| elif is_service_enabled qpid; then |
| if is_fedora; then |
| install_package qpid-cpp-server |
| if [[ $DISTRO =~ (rhel6) ]]; then |
| # RHEL6 leaves "auth=yes" in /etc/qpidd.conf, it needs to |
| # be no or you get GSS authentication errors as it |
| # attempts to default to this. |
| sudo sed -i.bak 's/^auth=yes$/auth=no/' /etc/qpidd.conf |
| fi |
| elif is_ubuntu; then |
| install_package qpidd |
| sudo sed -i '/PLAIN/!s/mech_list: /mech_list: PLAIN /' /etc/sasl2/qpidd.conf |
| sudo chmod o+r /etc/qpid/qpidd.sasldb |
| else |
| exit_distro_not_supported "qpid installation" |
| fi |
| elif is_service_enabled zeromq; then |
| # NOTE(ewindisch): Redis is not strictly necessary |
| # but there is a matchmaker driver that works |
| # really well & out of the box for multi-node. |
| if is_fedora; then |
| install_package zeromq python-zmq redis |
| elif is_ubuntu; then |
| install_package libzmq1 python-zmq redis-server |
| elif is_suse; then |
| install_package libzmq1 python-pyzmq redis |
| else |
| exit_distro_not_supported "zeromq installation" |
| fi |
| # Necessary directory for socket location. |
| sudo mkdir -p /var/run/openstack |
| sudo chown $STACK_USER /var/run/openstack |
| fi |
| } |
| |
| # restart the rpc backend |
| function restart_rpc_backend { |
| if is_service_enabled rabbit; then |
| # Start rabbitmq-server |
| echo_summary "Starting RabbitMQ" |
| # NOTE(bnemec): Retry initial rabbitmq configuration to deal with |
| # the fact that sometimes it fails to start properly. |
| # Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1059028 |
| local i |
| for i in `seq 10`; do |
| if is_fedora || is_suse; then |
| # service is not started by default |
| restart_service rabbitmq-server |
| fi |
| # change the rabbit password since the default is "guest" |
| sudo rabbitmqctl change_password guest $RABBIT_PASSWORD && break |
| [[ $i -eq "10" ]] && die $LINENO "Failed to set rabbitmq password" |
| done |
| if is_service_enabled n-cell; then |
| # Add partitioned access for the child cell |
| if [ -z `sudo rabbitmqctl list_vhosts | grep child_cell` ]; then |
| sudo rabbitmqctl add_vhost child_cell |
| sudo rabbitmqctl set_permissions -p child_cell guest ".*" ".*" ".*" |
| fi |
| fi |
| elif is_service_enabled qpid; then |
| echo_summary "Starting qpid" |
| restart_service qpidd |
| fi |
| } |
| |
| # iniset cofiguration |
| function iniset_rpc_backend { |
| local package=$1 |
| local file=$2 |
| local section=$3 |
| if is_service_enabled zeromq; then |
| iniset $file $section rpc_backend ${package}.openstack.common.rpc.impl_zmq |
| iniset $file $section rpc_zmq_matchmaker \ |
| ${package}.openstack.common.rpc.matchmaker_redis.MatchMakerRedis |
| # Set MATCHMAKER_REDIS_HOST if running multi-node. |
| MATCHMAKER_REDIS_HOST=${MATCHMAKER_REDIS_HOST:-127.0.0.1} |
| iniset $file matchmaker_redis host $MATCHMAKER_REDIS_HOST |
| elif is_service_enabled qpid || [ -n "$QPID_HOST" ]; then |
| iniset $file $section rpc_backend ${package}.openstack.common.rpc.impl_qpid |
| iniset $file $section qpid_hostname ${QPID_HOST:-$SERVICE_HOST} |
| if is_ubuntu; then |
| QPID_PASSWORD=`sudo strings /etc/qpid/qpidd.sasldb | grep -B1 admin | head -1` |
| iniset $file $section qpid_password $QPID_PASSWORD |
| iniset $file $section qpid_username admin |
| fi |
| elif is_service_enabled rabbit || { [ -n "$RABBIT_HOST" ] && [ -n "$RABBIT_PASSWORD" ]; }; then |
| iniset $file $section rpc_backend ${package}.openstack.common.rpc.impl_kombu |
| iniset $file $section rabbit_hosts $RABBIT_HOST |
| iniset $file $section rabbit_password $RABBIT_PASSWORD |
| fi |
| } |
| |
| # Check if qpid can be used on the current distro. |
| # qpid_is_supported |
| function qpid_is_supported { |
| if [[ -z "$DISTRO" ]]; then |
| GetDistro |
| fi |
| |
| # Qpid is not in openSUSE |
| ( ! is_suse ) |
| } |
| |
| |
| # Restore xtrace |
| $XTRACE |
| |
| # Tell emacs to use shell-script-mode |
| ## Local variables: |
| ## mode: shell-script |
| ## End: |