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4.1 Module classy ¶

Main interface module of Classy application.

Note: business releases can install hooks by setting classy:setup_hooks application environment variable to a tuple {Module, Function, Args}. This MFA can contain calls to various classy:on_... functions.

See also: classy_site_metadata, classy_vote, classy_uid, classy_node_monitor, classy_boot.

• node_set()
• node_set_name()
• predefined_run_level()
• run_level()
• kick_intent()
• join_intent()
• cluster_info()
• site_metadata()
• info()
• peer_info()
• site()
• cluster_id()
• extra_sync_targets(Hook)
• fallback_get_peer_nodes(Hook)
• fallback_get_meta(Hook, Prio)
• fallback_get_cluster(Hook)
• fallback_get_site(Hook)
• on_metadata_change(Hook, Prio)
• enrich_site_info(Hook, Prio)
• on_run_level(Hook, Prio)
• pre_autocluster(Hook, Prio)
• pre_autoclean(Hook, Prio)
• on_leave(Hook, Prio)
• on_kick_decided(Hook, Prio)
• pre_kick(Hook, Prio)
• post_join(Hook, Prio)
• pre_join(Hook, Prio)
• on_node_classify(Hook, Prio)
• on_peer_restart(Hook, Prio)
• on_peer_node_change(Hook, Prio)
• on_peer_liveness_change(Hook, Prio)
• on_membership_change(Hook, Prio)
• on_peer_connection_change(Hook, Prio)
• on_create_site(Hook, Prio)
• on_create_cluster(Hook, Prio)
• on_prep_stop(Hook, Prio)
• on_node_init(Hook, Prio)
• fault_tolerance(N)
• quorum/1
• the_cluster_err()
• the_cluster()
• the_site_err()
• the_site()
• run_level()
• node_sets()
• nodes(Name)
• sites(SetName)
• sites()
• kick_node(Node, Intent)
• kick_site(Site, Intent)
• join_node(Node, Intent)
• node_of_site(Site, OnlyConnected)
• node_to_site()
• n_restarts(Site)
• n_restarts()
• get_meta(Site)
• info(Nodes)
• info()
• stop_system(Reason)
• stop_system()
• start_system()