health_config.c

// SPDX-License-Identifier: GPL-3.0-or-later

#include "health.h"

#define HEALTH_CONF_MAX_LINE 4096

#define HEALTH_ALARM_KEY "alarm"
#define HEALTH_TEMPLATE_KEY "template"
#define HEALTH_ON_KEY "on"
#define HEALTH_HOST_KEY "hosts"
#define HEALTH_OS_KEY "os"
#define HEALTH_FAMILIES_KEY "families"
#define HEALTH_LOOKUP_KEY "lookup"
#define HEALTH_CALC_KEY "calc"
#define HEALTH_EVERY_KEY "every"
#define HEALTH_GREEN_KEY "green"
#define HEALTH_RED_KEY "red"
#define HEALTH_WARN_KEY "warn"
#define HEALTH_CRIT_KEY "crit"
#define HEALTH_EXEC_KEY "exec"
#define HEALTH_RECIPIENT_KEY "to"
#define HEALTH_UNITS_KEY "units"
#define HEALTH_INFO_KEY "info"
#define HEALTH_DELAY_KEY "delay"
#define HEALTH_OPTIONS_KEY "options"

static inline int rrdcalc_add_alarm_from_config(RRDHOST *host, RRDCALC *rc) {
    if(!rc->chart) {
        error("Health configuration for alarm '%s' does not have a chart", rc->name);
        return 0;
    }

    if(!rc->update_every) {
        error("Health configuration for alarm '%s.%s' has no frequency (parameter 'every'). Ignoring it.", rc->chart?rc->chart:"NOCHART", rc->name);
        return 0;
    }

    if(!RRDCALC_HAS_DB_LOOKUP(rc) && !rc->calculation && !rc->warning && !rc->critical) {
        error("Health configuration for alarm '%s.%s' is useless (no db lookup, no calculation, no warning and no critical expressions)", rc->chart?rc->chart:"NOCHART", rc->name);
        return 0;
    }

    if (rrdcalc_exists(host, rc->chart, rc->name, rc->hash_chart, rc->hash))
        return 0;

    rc->id = rrdcalc_get_unique_id(host, rc->chart, rc->name, &rc->next_event_id);

    debug(D_HEALTH, "Health configuration adding alarm '%s.%s' (%u): exec '%s', recipient '%s', green " CALCULATED_NUMBER_FORMAT_AUTO ", red " CALCULATED_NUMBER_FORMAT_AUTO ", lookup: group %d, after %d, before %d, options %u, dimensions '%s', update every %d, calculation '%s', warning '%s', critical '%s', source '%s', delay up %d, delay down %d, delay max %d, delay_multiplier %f",
            rc->chart?rc->chart:"NOCHART",
            rc->name,
            rc->id,
            (rc->exec)?rc->exec:"DEFAULT",
            (rc->recipient)?rc->recipient:"DEFAULT",
            rc->green,
            rc->red,
            (int)rc->group,
            rc->after,
            rc->before,
            rc->options,
            (rc->dimensions)?rc->dimensions:"NONE",
            rc->update_every,
            (rc->calculation)?rc->calculation->parsed_as:"NONE",
            (rc->warning)?rc->warning->parsed_as:"NONE",
            (rc->critical)?rc->critical->parsed_as:"NONE",
            rc->source,
            rc->delay_up_duration,
            rc->delay_down_duration,
            rc->delay_max_duration,
            rc->delay_multiplier
    );

    rrdcalc_create_part2(host, rc);
    return 1;
}

static inline int rrdcalctemplate_add_template_from_config(RRDHOST *host, RRDCALCTEMPLATE *rt) {
    if(unlikely(!rt->context)) {
        error("Health configuration for template '%s' does not have a context", rt->name);
        return 0;
    }

    if(unlikely(!rt->update_every)) {
        error("Health configuration for template '%s' has no frequency (parameter 'every'). Ignoring it.", rt->name);
        return 0;
    }

    if(unlikely(!RRDCALCTEMPLATE_HAS_DB_LOOKUP(rt) && !rt->calculation && !rt->warning && !rt->critical)) {
        error("Health configuration for template '%s' is useless (no calculation, no warning and no critical evaluation)", rt->name);
        return 0;
    }

    RRDCALCTEMPLATE *t, *last = NULL;
    for (t = host->templates; t ; last = t, t = t->next) {
        if(unlikely(t->hash_name == rt->hash_name
                    && !strcmp(t->name, rt->name)
                    && !strcmp(t->family_match?t->family_match:"*", rt->family_match?rt->family_match:"*")
        )) {
            error("Health configuration template '%s' already exists for host '%s'.", rt->name, host->hostname);
            return 0;
        }
    }

    debug(D_HEALTH, "Health configuration adding template '%s': context '%s', exec '%s', recipient '%s', green " CALCULATED_NUMBER_FORMAT_AUTO ", red " CALCULATED_NUMBER_FORMAT_AUTO ", lookup: group %d, after %d, before %d, options %u, dimensions '%s', update every %d, calculation '%s', warning '%s', critical '%s', source '%s', delay up %d, delay down %d, delay max %d, delay_multiplier %f",
            rt->name,
            (rt->context)?rt->context:"NONE",
            (rt->exec)?rt->exec:"DEFAULT",
            (rt->recipient)?rt->recipient:"DEFAULT",
            rt->green,
            rt->red,
            (int)rt->group,
            rt->after,
            rt->before,
            rt->options,
            (rt->dimensions)?rt->dimensions:"NONE",
            rt->update_every,
            (rt->calculation)?rt->calculation->parsed_as:"NONE",
            (rt->warning)?rt->warning->parsed_as:"NONE",
            (rt->critical)?rt->critical->parsed_as:"NONE",
            rt->source,
            rt->delay_up_duration,
            rt->delay_down_duration,
            rt->delay_max_duration,
            rt->delay_multiplier
    );

    if(likely(last)) {
        last->next = rt;
    }
    else {
        rt->next = host->templates;
        host->templates = rt;
    }

    return 1;
}

static inline int health_parse_duration(char *string, int *result) {
    // make sure it is a number
    if(!*string || !(isdigit(*string) || *string == '+' || *string == '-')) {
        *result = 0;
        return 0;
    }

    char *e = NULL;
    calculated_number n = str2ld(string, &e);
    if(e && *e) {
        switch (*e) {
            case 'Y':
                *result = (int) (n * 86400 * 365);
                break;
            case 'M':
                *result = (int) (n * 86400 * 30);
                break;
            case 'w':
                *result = (int) (n * 86400 * 7);
                break;
            case 'd':
                *result = (int) (n * 86400);
                break;
            case 'h':
                *result = (int) (n * 3600);
                break;
            case 'm':
                *result = (int) (n * 60);
                break;

            default:
            case 's':
                *result = (int) (n);
                break;
        }
    }
    else
        *result = (int)(n);

    return 1;
}

static inline int health_parse_delay(
        size_t line, const char *filename, char *string,
        int *delay_up_duration,
        int *delay_down_duration,
        int *delay_max_duration,
        float *delay_multiplier) {

    char given_up = 0;
    char given_down = 0;
    char given_max = 0;
    char given_multiplier = 0;

    char *s = string;
    while(*s) {
        char *key = s;

        while(*s && !isspace(*s)) s++;
        while(*s && isspace(*s)) *s++ = '\0';

        if(!*key) break;

        char *value = s;
        while(*s && !isspace(*s)) s++;
        while(*s && isspace(*s)) *s++ = '\0';

        if(!strcasecmp(key, "up")) {
            if (!health_parse_duration(value, delay_up_duration)) {
                error("Health configuration at line %zu of file '%s': invalid value '%s' for '%s' keyword",
                        line, filename, value, key);
            }
            else given_up = 1;
        }
        else if(!strcasecmp(key, "down")) {
            if (!health_parse_duration(value, delay_down_duration)) {
                error("Health configuration at line %zu of file '%s': invalid value '%s' for '%s' keyword",
                        line, filename, value, key);
            }
            else given_down = 1;
        }
        else if(!strcasecmp(key, "multiplier")) {
            *delay_multiplier = strtof(value, NULL);
            if(isnan(*delay_multiplier) || isinf(*delay_multiplier) || islessequal(*delay_multiplier, 0)) {
                error("Health configuration at line %zu of file '%s': invalid value '%s' for '%s' keyword",
                        line, filename, value, key);
            }
            else given_multiplier = 1;
        }
        else if(!strcasecmp(key, "max")) {
            if (!health_parse_duration(value, delay_max_duration)) {
                error("Health configuration at line %zu of file '%s': invalid value '%s' for '%s' keyword",
                        line, filename, value, key);
            }
            else given_max = 1;
        }
        else {
            error("Health configuration at line %zu of file '%s': unknown keyword '%s'",
                    line, filename, key);
        }
    }

    if(!given_up)
        *delay_up_duration = 0;

    if(!given_down)
        *delay_down_duration = 0;

    if(!given_multiplier)
        *delay_multiplier = 1.0;

    if(!given_max) {
        if((*delay_max_duration) < (*delay_up_duration) * (*delay_multiplier))
            *delay_max_duration = (int)((*delay_up_duration) * (*delay_multiplier));

        if((*delay_max_duration) < (*delay_down_duration) * (*delay_multiplier))
            *delay_max_duration = (int)((*delay_down_duration) * (*delay_multiplier));
    }

    return 1;
}

static inline uint32_t health_parse_options(const char *s) {
    uint32_t options = 0;
    char buf[100+1] = "";

    while(*s) {
        buf[0] = '\0';

        // skip spaces
        while(*s && isspace(*s))
            s++;

        // find the next space
        size_t count = 0;
        while(*s && count < 100 && !isspace(*s))
            buf[count++] = *s++;

        if(buf[0]) {
            buf[count] = '\0';

            if(!strcasecmp(buf, "no-clear-notification") || !strcasecmp(buf, "no-clear"))
                options |= RRDCALC_FLAG_NO_CLEAR_NOTIFICATION;
            else
                error("Ignoring unknown alarm option '%s'", buf);
        }
    }

    return options;
}

static inline int health_parse_db_lookup(
        size_t line, const char *filename, char *string,
        RRDR_GROUPING *group_method, int *after, int *before, int *every,
        uint32_t *options, char **dimensions
) {
    debug(D_HEALTH, "Health configuration parsing database lookup %zu@%s: %s", line, filename, string);

    if(*dimensions) freez(*dimensions);
    *dimensions = NULL;
    *after = 0;
    *before = 0;
    *every = 0;
    *options = 0;

    char *s = string, *key;

    // first is the group method
    key = s;
    while(*s && !isspace(*s)) s++;
    while(*s && isspace(*s)) *s++ = '\0';
    if(!*s) {
        error("Health configuration invalid chart calculation at line %zu of file '%s': expected group method followed by the 'after' time, but got '%s'",
                line, filename, key);
        return 0;
    }

    if((*group_method = web_client_api_request_v1_data_group(key, RRDR_GROUPING_UNDEFINED)) == RRDR_GROUPING_UNDEFINED) {
        error("Health configuration at line %zu of file '%s': invalid group method '%s'",
                line, filename, key);
        return 0;
    }

    // then is the 'after' time
    key = s;
    while(*s && !isspace(*s)) s++;
    while(*s && isspace(*s)) *s++ = '\0';

    if(!health_parse_duration(key, after)) {
        error("Health configuration at line %zu of file '%s': invalid duration '%s' after group method",
                line, filename, key);
        return 0;
    }

    // sane defaults
    *every = abs(*after);

    // now we may have optional parameters
    while(*s) {
        key = s;
        while(*s && !isspace(*s)) s++;
        while(*s && isspace(*s)) *s++ = '\0';
        if(!*key) break;

        if(!strcasecmp(key, "at")) {
            char *value = s;
            while(*s && !isspace(*s)) s++;
            while(*s && isspace(*s)) *s++ = '\0';

            if (!health_parse_duration(value, before)) {
                error("Health configuration at line %zu of file '%s': invalid duration '%s' for '%s' keyword",
                        line, filename, value, key);
            }
        }
        else if(!strcasecmp(key, HEALTH_EVERY_KEY)) {
            char *value = s;
            while(*s && !isspace(*s)) s++;
            while(*s && isspace(*s)) *s++ = '\0';

            if (!health_parse_duration(value, every)) {
                error("Health configuration at line %zu of file '%s': invalid duration '%s' for '%s' keyword",
                        line, filename, value, key);
            }
        }
        else if(!strcasecmp(key, "absolute") || !strcasecmp(key, "abs") || !strcasecmp(key, "absolute_sum")) {
            *options |= RRDR_OPTION_ABSOLUTE;
        }
        else if(!strcasecmp(key, "min2max")) {
            *options |= RRDR_OPTION_MIN2MAX;
        }
        else if(!strcasecmp(key, "null2zero")) {
            *options |= RRDR_OPTION_NULL2ZERO;
        }
        else if(!strcasecmp(key, "percentage")) {
            *options |= RRDR_OPTION_PERCENTAGE;
        }
        else if(!strcasecmp(key, "unaligned")) {
            *options |= RRDR_OPTION_NOT_ALIGNED;
        }
        else if(!strcasecmp(key, "match-ids") || !strcasecmp(key, "match_ids")) {
            *options |= RRDR_OPTION_MATCH_IDS;
        }
        else if(!strcasecmp(key, "match-names") || !strcasecmp(key, "match_names")) {
            *options |= RRDR_OPTION_MATCH_NAMES;
        }
        else if(!strcasecmp(key, "of")) {
            if(*s && strcasecmp(s, "all") != 0)
                *dimensions = strdupz(s);
            break;
        }
        else {
            error("Health configuration at line %zu of file '%s': unknown keyword '%s'",
                    line, filename, key);
        }
    }

    return 1;
}

static inline char *health_source_file(size_t line, const char *file) {
    char buffer[FILENAME_MAX + 1];
    snprintfz(buffer, FILENAME_MAX, "%zu@%s", line, file);
    return strdupz(buffer);
}

static inline void strip_quotes(char *s) {
    while(*s) {
        if(*s == '\'' || *s == '"') *s = ' ';
        s++;
    }
}

static int health_readfile(const char *filename, void *data) {
    RRDHOST *host = (RRDHOST *)data;

    debug(D_HEALTH, "Health configuration reading file '%s'", filename);

    static uint32_t
            hash_alarm = 0,
            hash_template = 0,
            hash_os = 0,
            hash_on = 0,
            hash_host = 0,
            hash_families = 0,
            hash_calc = 0,
            hash_green = 0,
            hash_red = 0,
            hash_warn = 0,
            hash_crit = 0,
            hash_exec = 0,
            hash_every = 0,
            hash_lookup = 0,
            hash_units = 0,
            hash_info = 0,
            hash_recipient = 0,
            hash_delay = 0,
            hash_options = 0;

    char buffer[HEALTH_CONF_MAX_LINE + 1];

    if(unlikely(!hash_alarm)) {
        hash_alarm = simple_uhash(HEALTH_ALARM_KEY);
        hash_template = simple_uhash(HEALTH_TEMPLATE_KEY);
        hash_on = simple_uhash(HEALTH_ON_KEY);
        hash_os = simple_uhash(HEALTH_OS_KEY);
        hash_host = simple_uhash(HEALTH_HOST_KEY);
        hash_families = simple_uhash(HEALTH_FAMILIES_KEY);
        hash_calc = simple_uhash(HEALTH_CALC_KEY);
        hash_lookup = simple_uhash(HEALTH_LOOKUP_KEY);
        hash_green = simple_uhash(HEALTH_GREEN_KEY);
        hash_red = simple_uhash(HEALTH_RED_KEY);
        hash_warn = simple_uhash(HEALTH_WARN_KEY);
        hash_crit = simple_uhash(HEALTH_CRIT_KEY);
        hash_exec = simple_uhash(HEALTH_EXEC_KEY);
        hash_every = simple_uhash(HEALTH_EVERY_KEY);
        hash_units = simple_hash(HEALTH_UNITS_KEY);
        hash_info = simple_hash(HEALTH_INFO_KEY);
        hash_recipient = simple_hash(HEALTH_RECIPIENT_KEY);
        hash_delay = simple_uhash(HEALTH_DELAY_KEY);
        hash_options = simple_uhash(HEALTH_OPTIONS_KEY);
    }

    FILE *fp = fopen(filename, "r");
    if(!fp) {
        error("Health configuration cannot read file '%s'.", filename);
        return 0;
    }

    RRDCALC *rc = NULL;
    RRDCALCTEMPLATE *rt = NULL;

    int ignore_this = 0;
    size_t line = 0, append = 0;
    char *s;
    while((s = fgets(&buffer[append], (int)(HEALTH_CONF_MAX_LINE - append), fp)) || append) {
        int stop_appending = !s;
        line++;
        s = trim(buffer);
        if(!s || *s == '#') continue;

        append = strlen(s);
        if(!stop_appending && s[append - 1] == '\\') {
            s[append - 1] = ' ';
            append = &s[append] - buffer;
            if(append < HEALTH_CONF_MAX_LINE)
                continue;
            else {
                error("Health configuration has too long muli-line at line %zu of file '%s'.", line, filename);
            }
        }
        append = 0;

        char *key = s;
        while(*s && *s != ':') s++;
        if(!*s) {
            error("Health configuration has invalid line %zu of file '%s'. It does not contain a ':'. Ignoring it.", line, filename);
            continue;
        }
        *s = '\0';
        s++;

        char *value = s;
        key = trim_all(key);
        value = trim_all(value);

        if(!key) {
            error("Health configuration has invalid line %zu of file '%s'. Keyword is empty. Ignoring it.", line, filename);
            continue;
        }

        if(!value) {
            error("Health configuration has invalid line %zu of file '%s'. value is empty. Ignoring it.", line, filename);
            continue;
        }

        uint32_t hash = simple_uhash(key);

        if(hash == hash_alarm && !strcasecmp(key, HEALTH_ALARM_KEY)) {
            if (rc && (ignore_this || !rrdcalc_add_alarm_from_config(host, rc)))
                rrdcalc_free(rc);

            if(rt) {
                if (ignore_this || !rrdcalctemplate_add_template_from_config(host, rt))
                    rrdcalctemplate_free(rt);

                rt = NULL;
            }

            rc = callocz(1, sizeof(RRDCALC));
            rc->next_event_id = 1;
            rc->name = strdupz(value);
            rc->hash = simple_hash(rc->name);
            rc->source = health_source_file(line, filename);
            rc->green = NAN;
            rc->red = NAN;
            rc->value = NAN;
            rc->old_value = NAN;
            rc->delay_multiplier = 1.0;

            if(rrdvar_fix_name(rc->name))
                error("Health configuration renamed alarm '%s' to '%s'", value, rc->name);

            ignore_this = 0;
        }
        else if(hash == hash_template && !strcasecmp(key, HEALTH_TEMPLATE_KEY)) {
            if(rc) {
                if(ignore_this || !rrdcalc_add_alarm_from_config(host, rc))
                    rrdcalc_free(rc);

                rc = NULL;
            }

            if(rt && (ignore_this || !rrdcalctemplate_add_template_from_config(host, rt)))
                rrdcalctemplate_free(rt);

            rt = callocz(1, sizeof(RRDCALCTEMPLATE));
            rt->name = strdupz(value);
            rt->hash_name = simple_hash(rt->name);
            rt->source = health_source_file(line, filename);
            rt->green = NAN;
            rt->red = NAN;
            rt->delay_multiplier = 1.0;

            if(rrdvar_fix_name(rt->name))
                error("Health configuration renamed template '%s' to '%s'", value, rt->name);

            ignore_this = 0;
        }
        else if(hash == hash_os && !strcasecmp(key, HEALTH_OS_KEY)) {
            char *os_match = value;
            SIMPLE_PATTERN *os_pattern = simple_pattern_create(os_match, NULL, SIMPLE_PATTERN_EXACT);

            if(!simple_pattern_matches(os_pattern, host->os)) {
                if(rc)
                    debug(D_HEALTH, "HEALTH on '%s' ignoring alarm '%s' defined at %zu@%s: host O/S does not match '%s'", host->hostname, rc->name, line, filename, os_match);

                if(rt)
                    debug(D_HEALTH, "HEALTH on '%s' ignoring template '%s' defined at %zu@%s: host O/S does not match '%s'", host->hostname, rt->name, line, filename, os_match);

                ignore_this = 1;
            }

            simple_pattern_free(os_pattern);
        }
        else if(hash == hash_host && !strcasecmp(key, HEALTH_HOST_KEY)) {
            char *host_match = value;
            SIMPLE_PATTERN *host_pattern = simple_pattern_create(host_match, NULL, SIMPLE_PATTERN_EXACT);

            if(!simple_pattern_matches(host_pattern, host->hostname)) {
                if(rc)
                    debug(D_HEALTH, "HEALTH on '%s' ignoring alarm '%s' defined at %zu@%s: hostname does not match '%s'", host->hostname, rc->name, line, filename, host_match);

                if(rt)
                    debug(D_HEALTH, "HEALTH on '%s' ignoring template '%s' defined at %zu@%s: hostname does not match '%s'", host->hostname, rt->name, line, filename, host_match);

                ignore_this = 1;
            }

            simple_pattern_free(host_pattern);
        }
        else if(rc) {
            if(hash == hash_on && !strcasecmp(key, HEALTH_ON_KEY)) {
                if(rc->chart) {
                    if(strcmp(rc->chart, value) != 0)
                        error("Health configuration at line %zu of file '%s' for alarm '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
                                line, filename, rc->name, key, rc->chart, value, value);

                    freez(rc->chart);
                }
                rc->chart = strdupz(value);
                rc->hash_chart = simple_hash(rc->chart);
            }
            else if(hash == hash_lookup && !strcasecmp(key, HEALTH_LOOKUP_KEY)) {
                health_parse_db_lookup(line, filename, value, &rc->group, &rc->after, &rc->before,
                        &rc->update_every,
                        &rc->options, &rc->dimensions);
            }
            else if(hash == hash_every && !strcasecmp(key, HEALTH_EVERY_KEY)) {
                if(!health_parse_duration(value, &rc->update_every))
                    error("Health configuration at line %zu of file '%s' for alarm '%s' at key '%s' cannot parse duration: '%s'.",
                            line, filename, rc->name, key, value);
            }
            else if(hash == hash_green && !strcasecmp(key, HEALTH_GREEN_KEY)) {
                char *e;
                rc->green = str2ld(value, &e);
                if(e && *e) {
                    error("Health configuration at line %zu of file '%s' for alarm '%s' at key '%s' leaves this string unmatched: '%s'.",
                            line, filename, rc->name, key, e);
                }
            }
            else if(hash == hash_red && !strcasecmp(key, HEALTH_RED_KEY)) {
                char *e;
                rc->red = str2ld(value, &e);
                if(e && *e) {
                    error("Health configuration at line %zu of file '%s' for alarm '%s' at key '%s' leaves this string unmatched: '%s'.",
                            line, filename, rc->name, key, e);
                }
            }
            else if(hash == hash_calc && !strcasecmp(key, HEALTH_CALC_KEY)) {
                const char *failed_at = NULL;
                int error = 0;
                rc->calculation = expression_parse(value, &failed_at, &error);
                if(!rc->calculation) {
                    error("Health configuration at line %zu of file '%s' for alarm '%s' at key '%s' has unparse-able expression '%s': %s at '%s'",
                            line, filename, rc->name, key, value, expression_strerror(error), failed_at);
                }
            }
            else if(hash == hash_warn && !strcasecmp(key, HEALTH_WARN_KEY)) {
                const char *failed_at = NULL;
                int error = 0;
                rc->warning = expression_parse(value, &failed_at, &error);
                if(!rc->warning) {
                    error("Health configuration at line %zu of file '%s' for alarm '%s' at key '%s' has unparse-able expression '%s': %s at '%s'",
                            line, filename, rc->name, key, value, expression_strerror(error), failed_at);
                }
            }
            else if(hash == hash_crit && !strcasecmp(key, HEALTH_CRIT_KEY)) {
                const char *failed_at = NULL;
                int error = 0;
                rc->critical = expression_parse(value, &failed_at, &error);
                if(!rc->critical) {
                    error("Health configuration at line %zu of file '%s' for alarm '%s' at key '%s' has unparse-able expression '%s': %s at '%s'",
                            line, filename, rc->name, key, value, expression_strerror(error), failed_at);
                }
            }
            else if(hash == hash_exec && !strcasecmp(key, HEALTH_EXEC_KEY)) {
                if(rc->exec) {
                    if(strcmp(rc->exec, value) != 0)
                        error("Health configuration at line %zu of file '%s' for alarm '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
                                line, filename, rc->name, key, rc->exec, value, value);

                    freez(rc->exec);
                }
                rc->exec = strdupz(value);
            }
            else if(hash == hash_recipient && !strcasecmp(key, HEALTH_RECIPIENT_KEY)) {
                if(rc->recipient) {
                    if(strcmp(rc->recipient, value) != 0)
                        error("Health configuration at line %zu of file '%s' for alarm '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
                                line, filename, rc->name, key, rc->recipient, value, value);

                    freez(rc->recipient);
                }
                rc->recipient = strdupz(value);
            }
            else if(hash == hash_units && !strcasecmp(key, HEALTH_UNITS_KEY)) {
                if(rc->units) {
                    if(strcmp(rc->units, value) != 0)
                        error("Health configuration at line %zu of file '%s' for alarm '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
                                line, filename, rc->name, key, rc->units, value, value);

                    freez(rc->units);
                }
                rc->units = strdupz(value);
                strip_quotes(rc->units);
            }
            else if(hash == hash_info && !strcasecmp(key, HEALTH_INFO_KEY)) {
                if(rc->info) {
                    if(strcmp(rc->info, value) != 0)
                        error("Health configuration at line %zu of file '%s' for alarm '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
                                line, filename, rc->name, key, rc->info, value, value);

                    freez(rc->info);
                }
                rc->info = strdupz(value);
                strip_quotes(rc->info);
            }
            else if(hash == hash_delay && !strcasecmp(key, HEALTH_DELAY_KEY)) {
                health_parse_delay(line, filename, value, &rc->delay_up_duration, &rc->delay_down_duration, &rc->delay_max_duration, &rc->delay_multiplier);
            }
            else if(hash == hash_options && !strcasecmp(key, HEALTH_OPTIONS_KEY)) {
                rc->options |= health_parse_options(value);
            }
            else {
                error("Health configuration at line %zu of file '%s' for alarm '%s' has unknown key '%s'.",
                        line, filename, rc->name, key);
            }
        }
        else if(rt) {
            if(hash == hash_on && !strcasecmp(key, HEALTH_ON_KEY)) {
                if(rt->context) {
                    if(strcmp(rt->context, value) != 0)
                        error("Health configuration at line %zu of file '%s' for template '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
                                line, filename, rt->name, key, rt->context, value, value);

                    freez(rt->context);
                }
                rt->context = strdupz(value);
                rt->hash_context = simple_hash(rt->context);
            }
            else if(hash == hash_families && !strcasecmp(key, HEALTH_FAMILIES_KEY)) {
                freez(rt->family_match);
                simple_pattern_free(rt->family_pattern);

                rt->family_match = strdupz(value);
                rt->family_pattern = simple_pattern_create(rt->family_match, NULL, SIMPLE_PATTERN_EXACT);
            }
            else if(hash == hash_lookup && !strcasecmp(key, HEALTH_LOOKUP_KEY)) {
                health_parse_db_lookup(line, filename, value, &rt->group, &rt->after, &rt->before,
                        &rt->update_every, &rt->options, &rt->dimensions);
            }
            else if(hash == hash_every && !strcasecmp(key, HEALTH_EVERY_KEY)) {
                if(!health_parse_duration(value, &rt->update_every))
                    error("Health configuration at line %zu of file '%s' for template '%s' at key '%s' cannot parse duration: '%s'.",
                            line, filename, rt->name, key, value);
            }
            else if(hash == hash_green && !strcasecmp(key, HEALTH_GREEN_KEY)) {
                char *e;
                rt->green = str2ld(value, &e);
                if(e && *e) {
                    error("Health configuration at line %zu of file '%s' for template '%s' at key '%s' leaves this string unmatched: '%s'.",
                            line, filename, rt->name, key, e);
                }
            }
            else if(hash == hash_red && !strcasecmp(key, HEALTH_RED_KEY)) {
                char *e;
                rt->red = str2ld(value, &e);
                if(e && *e) {
                    error("Health configuration at line %zu of file '%s' for template '%s' at key '%s' leaves this string unmatched: '%s'.",
                            line, filename, rt->name, key, e);
                }
            }
            else if(hash == hash_calc && !strcasecmp(key, HEALTH_CALC_KEY)) {
                const char *failed_at = NULL;
                int error = 0;
                rt->calculation = expression_parse(value, &failed_at, &error);
                if(!rt->calculation) {
                    error("Health configuration at line %zu of file '%s' for template '%s' at key '%s' has unparse-able expression '%s': %s at '%s'",
                            line, filename, rt->name, key, value, expression_strerror(error), failed_at);
                }
            }
            else if(hash == hash_warn && !strcasecmp(key, HEALTH_WARN_KEY)) {
                const char *failed_at = NULL;
                int error = 0;
                rt->warning = expression_parse(value, &failed_at, &error);
                if(!rt->warning) {
                    error("Health configuration at line %zu of file '%s' for template '%s' at key '%s' has unparse-able expression '%s': %s at '%s'",
                            line, filename, rt->name, key, value, expression_strerror(error), failed_at);
                }
            }
            else if(hash == hash_crit && !strcasecmp(key, HEALTH_CRIT_KEY)) {
                const char *failed_at = NULL;
                int error = 0;
                rt->critical = expression_parse(value, &failed_at, &error);
                if(!rt->critical) {
                    error("Health configuration at line %zu of file '%s' for template '%s' at key '%s' has unparse-able expression '%s': %s at '%s'",
                            line, filename, rt->name, key, value, expression_strerror(error), failed_at);
                }
            }
            else if(hash == hash_exec && !strcasecmp(key, HEALTH_EXEC_KEY)) {
                if(rt->exec) {
                    if(strcmp(rt->exec, value) != 0)
                        error("Health configuration at line %zu of file '%s' for template '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
                                line, filename, rt->name, key, rt->exec, value, value);

                    freez(rt->exec);
                }
                rt->exec = strdupz(value);
            }
            else if(hash == hash_recipient && !strcasecmp(key, HEALTH_RECIPIENT_KEY)) {
                if(rt->recipient) {
                    if(strcmp(rt->recipient, value) != 0)
                        error("Health configuration at line %zu of file '%s' for template '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
                                line, filename, rt->name, key, rt->recipient, value, value);

                    freez(rt->recipient);
                }
                rt->recipient = strdupz(value);
            }
            else if(hash == hash_units && !strcasecmp(key, HEALTH_UNITS_KEY)) {
                if(rt->units) {
                    if(strcmp(rt->units, value) != 0)
                        error("Health configuration at line %zu of file '%s' for template '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
                                line, filename, rt->name, key, rt->units, value, value);

                    freez(rt->units);
                }
                rt->units = strdupz(value);
                strip_quotes(rt->units);
            }
            else if(hash == hash_info && !strcasecmp(key, HEALTH_INFO_KEY)) {
                if(rt->info) {
                    if(strcmp(rt->info, value) != 0)
                        error("Health configuration at line %zu of file '%s' for template '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
                                line, filename, rt->name, key, rt->info, value, value);

                    freez(rt->info);
                }
                rt->info = strdupz(value);
                strip_quotes(rt->info);
            }
            else if(hash == hash_delay && !strcasecmp(key, HEALTH_DELAY_KEY)) {
                health_parse_delay(line, filename, value, &rt->delay_up_duration, &rt->delay_down_duration, &rt->delay_max_duration, &rt->delay_multiplier);
            }
            else if(hash == hash_options && !strcasecmp(key, HEALTH_OPTIONS_KEY)) {
                rt->options |= health_parse_options(value);
            }
            else {
                error("Health configuration at line %zu of file '%s' for template '%s' has unknown key '%s'.",
                        line, filename, rt->name, key);
            }
        }
        else {
            error("Health configuration at line %zu of file '%s' has unknown key '%s'. Expected either '" HEALTH_ALARM_KEY "' or '" HEALTH_TEMPLATE_KEY "'.",
                    line, filename, key);
        }
    }

    if(rc && (ignore_this || !rrdcalc_add_alarm_from_config(host, rc)))
        rrdcalc_free(rc);

    if(rt && (ignore_this || !rrdcalctemplate_add_template_from_config(host, rt)))
        rrdcalctemplate_free(rt);

    fclose(fp);
    return 1;
}

void health_readdir(RRDHOST *host, const char *user_path, const char *stock_path, const char *subpath) {
    if(unlikely(!host->health_enabled)) {
        debug(D_HEALTH, "CONFIG health is not enabled for host '%s'", host->hostname);
        return;
    }
    recursive_config_double_dir_load(user_path, stock_path, subpath, health_readfile, (void *) host, 0);
}