+extern void rrdcalctemplate_link_matching(RRDSET *st);
+extern RRDCALC *rrdcalc_find(RRDSET *st, const char *name);
+
+extern void health_init(void);
+extern void *health_main(void *ptr);
+
+extern void health_reload(void);
+
+extern int health_variable_lookup(const char *variable, uint32_t hash, RRDCALC *rc, calculated_number *result);
+extern void health_alarms2json(RRDHOST *host, BUFFER *wb, int all);
+extern void health_alarm_log2json(RRDHOST *host, BUFFER *wb, uint32_t after);
+
+void health_api_v1_chart_variables2json(RRDSET *st, BUFFER *buf);
+
+extern RRDVAR *rrdvar_custom_host_variable_create(RRDHOST *host, const char *name);
+extern void rrdvar_custom_host_variable_destroy(RRDHOST *host, const char *name);
+extern void rrdvar_custom_host_variable_set(RRDVAR *rv, calculated_number value);
+
+extern const char *rrdcalc_status2string(int status);
+
+
+extern int health_alarm_log_open(RRDHOST *host);
+extern void health_alarm_log_close(RRDHOST *host);
+extern void health_log_rotate(RRDHOST *host);
+extern void health_alarm_log_save(RRDHOST *host, ALARM_ENTRY *ae);
+extern ssize_t health_alarm_log_read(RRDHOST *host, FILE *fp, const char *filename);
+extern void health_alarm_log_load(RRDHOST *host);
+extern void health_alarm_log(
+ RRDHOST *host,
+ uint32_t alarm_id,
+ uint32_t alarm_event_id,
+ time_t when,
+ const char *name,
+ const char *chart,
+ const char *family,
+ const char *exec,
+ const char *recipient,
+ time_t duration,
+ calculated_number old_value,
+ calculated_number new_value,
+ int old_status,
+ int new_status,
+ const char *source,
+ const char *units,
+ const char *info,
+ int delay,
+ uint32_t flags
+);
+
+extern void health_readdir(RRDHOST *host, const char *path);
+extern char *health_config_dir(void);
+extern void health_reload_host(RRDHOST *host);
+extern void health_alarm_log_free(RRDHOST *host);
+
+extern void rrdcalc_free(RRDHOST *host, RRDCALC *rc);
+extern void rrdcalctemplate_free(RRDHOST *host, RRDCALCTEMPLATE *rt);
+
+#ifdef NETDATA_HEALTH_INTERNALS
+#define RRDVAR_MAX_LENGTH 1024
+
+extern int rrdcalc_exists(RRDHOST *host, const char *chart, const char *name, uint32_t hash_chart, uint32_t hash_name);
+extern uint32_t rrdcalc_get_unique_id(RRDHOST *host, const char *chart, const char *name, uint32_t *next_event_id);
+extern int rrdvar_fix_name(char *variable);
+
+extern RRDCALC *rrdcalc_create(RRDHOST *host, RRDCALCTEMPLATE *rt, const char *chart);
+extern void rrdcalc_create_part2(RRDHOST *host, RRDCALC *rc);
+
+extern RRDVAR *rrdvar_create_and_index(const char *scope, avl_tree_lock *tree, const char *name, int type, void *value);
+extern void rrdvar_free(RRDHOST *host, avl_tree_lock *tree, RRDVAR *rv);
+
+extern void health_alarm_log_free_one_nochecks_nounlink(ALARM_ENTRY *ae);
+
+#endif // NETDATA_HEALTH_INTERNALS