+}
+
+congress_add_rule() {
+ name=$1
+ policy=$2
+ rule=$3
+
+ if ! openstack congress policy rule list $policy | grep -q -e "// Name: $name$" ; then
+ openstack congress policy rule create --name $name $policy "$rule"
+ fi
+}
+
+congress_del_rule() {
+ name=$1
+ policy=$2
+
+ if openstack congress policy rule list $policy | grep -q -e "^// Name: $name$" ; then
+ openstack congress policy rule delete $policy $name
+ fi
+}
+
+congress_setup_rules() {
+ congress_add_rule host_down classification \
+ 'host_down(host) :-
+ doctor:events(hostname=host, type="compute.host.down", status="down")'
+
+ congress_add_rule active_instance_in_host classification \
+ 'active_instance_in_host(vmid, host) :-
+ nova:servers(id=vmid, host_name=host, status="ACTIVE")'
+
+ congress_add_rule host_force_down classification \
+ 'execute[nova:services.force_down(host, "nova-compute", "True")] :-
+ host_down(host)'
+
+ congress_add_rule error_vm_states classification \
+ 'execute[nova:servers.reset_state(vmid, "error")] :-
+ host_down(host),
+ active_instance_in_host(vmid, host)'