def try_launch_container(cls, user_id, max_hop=False): sessname = unique_sessname(user_id) cont = SessContainer.get_by_name(sessname) cls.log_debug("have existing container for %s: %r", sessname, None != cont) if cont is not None: cls.log_debug("container running: %r", cont.is_running()) if max_hop: self_load = Compute.get_instance_stats(Compute.get_instance_id(), 'Load') if self_load < 100: SessContainer.invalidate_container(sessname) JBoxAsyncJob.async_launch_by_name(sessname, user_id, True) return True is_leader = is_proposed_cluster_leader() if ((cont is None) or (not cont.is_running())) and ( not Compute.should_accept_session(is_leader)): if cont is not None: SessContainer.invalidate_container(cont.get_name()) JBoxAsyncJob.async_backup_and_cleanup(cont.dockid) return False SessContainer.invalidate_container(sessname) JBoxAsyncJob.async_launch_by_name(sessname, user_id, True) return True
def is_cluster_leader(): self_id = Compute.get_instance_id() cluster = Compute.get_install_id() instances = Compute.get_all_instances() leader = JBoxDynConfig.get_cluster_leader(cluster) img_recentness = Compute.get_image_recentness() JBoxDB.log_debug("cluster: %s. instances: %s. leader: %s. image recentness: %d", cluster, repr(instances), repr(leader), img_recentness) # if none set, or set instance is dead elect self as leader, but wait till next cycle to prevent conflicts if (leader is None) or (leader not in instances) and (img_recentness >= 0): JBoxDB.log_info("setting self (%s) as cluster leader", self_id) try: JBoxDynConfig.set_cluster_leader(cluster, self_id) except: JBoxDB.log_info("error setting self (%s) as cluster leader, will retry", self_id) return False is_leader = (leader == self_id) # if running an older ami, step down from cluster leader if (img_recentness < 0) and is_leader: JBoxDB.log_info("unmarking self (%s) as cluster leader", self_id) JBoxDynConfig.unset_cluster_leader(cluster) return False return is_leader
def is_cluster_leader(): self_id = Compute.get_instance_id() cluster = Compute.get_install_id() instances = Compute.get_all_instances() leader = JBoxDynConfig.get_cluster_leader(cluster) img_recentness = Compute.get_image_recentness() JBoxDB.log_debug( "cluster: %s. instances: %s. leader: %s. image recentness: %d", cluster, repr(instances), repr(leader), img_recentness) # if none set, or set instance is dead elect self as leader, but wait till next cycle to prevent conflicts if (leader is None) or (leader not in instances) and (img_recentness >= 0): JBoxDB.log_info("setting self (%s) as cluster leader", self_id) try: JBoxDynConfig.set_cluster_leader(cluster, self_id) except: JBoxDB.log_info( "error setting self (%s) as cluster leader, will retry", self_id) return False is_leader = (leader == self_id) # if running an older ami, step down from cluster leader if (img_recentness < 0) and is_leader: JBoxDB.log_info("unmarking self (%s) as cluster leader", self_id) JBoxDynConfig.unset_cluster_leader(cluster) return False return is_leader
def redirect_to_logged_in_instance(self, user_id): loggedin_instance = self.find_logged_in_instance(user_id) if loggedin_instance is not None \ and loggedin_instance != Compute.get_instance_id() \ and loggedin_instance != 'localhost': # redirect to the instance that has the user's session self.log_info("Already logged in to %s. Redirecting", loggedin_instance) redirect_ip = Compute.get_instance_local_ip(loggedin_instance) self.set_redirect_instance_id(redirect_ip) self.redirect('/') return True self.log_info("Logged in %s", "nowhere" if loggedin_instance is None else "here already") return False
def redirect_to_logged_in_instance(self, user_id): loggedin_instance = self.find_logged_in_instance(user_id) if loggedin_instance is not None \ and loggedin_instance != Compute.get_instance_id() \ and loggedin_instance != 'localhost': # redirect to the instance that has the user's session self.log_info("Already logged in to %s. Redirecting", loggedin_instance) redirect_ip = Compute.get_instance_local_ip(loggedin_instance) self.set_redirect_instance_id(redirect_ip) self.redirect('/') return True self.log_info( "Logged in %s", "nowhere" if loggedin_instance is None else "here already") return False
def try_launch_container(cls, user_id, max_hop=False): sessname = unique_sessname(user_id) cont = SessContainer.get_by_name(sessname) cls.log_debug("have existing container for %s: %r", sessname, None != cont) if cont is not None: cls.log_debug("container running: %r", cont.is_running()) if max_hop: self_load = Compute.get_instance_stats(Compute.get_instance_id(), 'Load') if self_load < 100: SessContainer.invalidate_container(sessname) JBoxAsyncJob.async_launch_by_name(sessname, user_id, True) return True is_leader = is_proposed_cluster_leader() if ((cont is None) or (not cont.is_running())) and (not Compute.should_accept_session(is_leader)): if cont is not None: SessContainer.invalidate_container(cont.get_name()) JBoxAsyncJob.async_backup_and_cleanup(cont.dockid) return False SessContainer.invalidate_container(sessname) JBoxAsyncJob.async_launch_by_name(sessname, user_id, True) return True
def is_proposed_cluster_leader(): cluster = Compute.get_install_id() leader = JBoxDynConfig.get_cluster_leader(cluster) return leader == Compute.get_instance_id()