diff --git a/tools/crm_resource_ban.c b/tools/crm_resource_ban.c index bf4f458162..0aca8e9757 100644 --- a/tools/crm_resource_ban.c +++ b/tools/crm_resource_ban.c @@ -1,465 +1,479 @@ /* * Copyright 2004-2021 the Pacemaker project contributors * * The version control history for this file may have further details. * * This source code is licensed under the GNU General Public License version 2 * or later (GPLv2+) WITHOUT ANY WARRANTY. */ #include #define XPATH_MAX 1024 static char * parse_cli_lifetime(pcmk__output_t *out, const char *move_lifetime) { char *later_s = NULL; crm_time_t *now = NULL; crm_time_t *later = NULL; crm_time_t *duration = NULL; if (move_lifetime == NULL) { return NULL; } duration = crm_time_parse_duration(move_lifetime); if (duration == NULL) { out->err(out, "Invalid duration specified: %s\n" "Please refer to https://en.wikipedia.org/wiki/ISO_8601#Durations " "for examples of valid durations", move_lifetime); return NULL; } now = crm_time_new(NULL); later = crm_time_add(now, duration); if (later == NULL) { out->err(out, "Unable to add %s to current time\n" "Please report to " PACKAGE_BUGREPORT " as possible bug", move_lifetime); crm_time_free(now); crm_time_free(duration); return NULL; } crm_time_log(LOG_INFO, "now ", now, crm_time_log_date | crm_time_log_timeofday | crm_time_log_with_timezone); crm_time_log(LOG_INFO, "later ", later, crm_time_log_date | crm_time_log_timeofday | crm_time_log_with_timezone); crm_time_log(LOG_INFO, "duration", duration, crm_time_log_date | crm_time_log_timeofday); later_s = crm_time_as_string(later, crm_time_log_date | crm_time_log_timeofday | crm_time_log_with_timezone); out->info(out, "Migration will take effect until: %s", later_s); crm_time_free(duration); crm_time_free(later); crm_time_free(now); return later_s; } +static const char * +promoted_role_name(void) +{ + /* This is a judgment call for what string to use. @TODO Ideally we'd + * use the legacy string if the DC only supports that, and the new one + * otherwise. Basing it on --enable-compat-2.0 is a decent guess. + */ +#ifdef PCMK__COMPAT_2_0 + return RSC_ROLE_PROMOTED_LEGACY_S; +#else + return RSC_ROLE_PROMOTED_S; +#endif +} + // \return Standard Pacemaker return code int cli_resource_ban(pcmk__output_t *out, const char *rsc_id, const char *host, const char *move_lifetime, GList *allnodes, cib_t * cib_conn, int cib_options, gboolean promoted_role_only) { char *later_s = NULL; int rc = pcmk_rc_ok; xmlNode *fragment = NULL; xmlNode *location = NULL; if(host == NULL) { GList *n = allnodes; for(; n && rc == pcmk_rc_ok; n = n->next) { pe_node_t *target = n->data; rc = cli_resource_ban(out, rsc_id, target->details->uname, move_lifetime, NULL, cib_conn, cib_options, promoted_role_only); } return rc; } later_s = parse_cli_lifetime(out, move_lifetime); if(move_lifetime && later_s == NULL) { return EINVAL; } fragment = create_xml_node(NULL, XML_CIB_TAG_CONSTRAINTS); location = create_xml_node(fragment, XML_CONS_TAG_RSC_LOCATION); crm_xml_set_id(location, "cli-ban-%s-on-%s", rsc_id, host); out->info(out, "WARNING: Creating rsc_location constraint '%s' with a " "score of -INFINITY for resource %s on %s.\n\tThis will " "prevent %s from %s on %s until the constraint is removed " "using the clear option or by editing the CIB with an " "appropriate tool\n\tThis will be the case even if %s " "is the last node in the cluster", ID(location), rsc_id, host, rsc_id, (promoted_role_only? "being promoted" : "running"), host, host); crm_xml_add(location, XML_LOC_ATTR_SOURCE, rsc_id); if(promoted_role_only) { - crm_xml_add(location, XML_RULE_ATTR_ROLE, RSC_ROLE_PROMOTED_LEGACY_S); + crm_xml_add(location, XML_RULE_ATTR_ROLE, promoted_role_name()); } else { crm_xml_add(location, XML_RULE_ATTR_ROLE, RSC_ROLE_STARTED_S); } if (later_s == NULL) { /* Short form */ crm_xml_add(location, XML_CIB_TAG_NODE, host); crm_xml_add(location, XML_RULE_ATTR_SCORE, CRM_MINUS_INFINITY_S); } else { xmlNode *rule = create_xml_node(location, XML_TAG_RULE); xmlNode *expr = create_xml_node(rule, XML_TAG_EXPRESSION); crm_xml_set_id(rule, "cli-ban-%s-on-%s-rule", rsc_id, host); crm_xml_add(rule, XML_RULE_ATTR_SCORE, CRM_MINUS_INFINITY_S); crm_xml_add(rule, XML_RULE_ATTR_BOOLEAN_OP, "and"); crm_xml_set_id(expr, "cli-ban-%s-on-%s-expr", rsc_id, host); crm_xml_add(expr, XML_EXPR_ATTR_ATTRIBUTE, CRM_ATTR_UNAME); crm_xml_add(expr, XML_EXPR_ATTR_OPERATION, "eq"); crm_xml_add(expr, XML_EXPR_ATTR_VALUE, host); crm_xml_add(expr, XML_EXPR_ATTR_TYPE, "string"); expr = create_xml_node(rule, "date_expression"); crm_xml_set_id(expr, "cli-ban-%s-on-%s-lifetime", rsc_id, host); crm_xml_add(expr, "operation", "lt"); crm_xml_add(expr, "end", later_s); } crm_log_xml_notice(fragment, "Modify"); rc = cib_conn->cmds->update(cib_conn, XML_CIB_TAG_CONSTRAINTS, fragment, cib_options); rc = pcmk_legacy2rc(rc); free_xml(fragment); free(later_s); return rc; } // \return Standard Pacemaker return code int cli_resource_prefer(pcmk__output_t *out,const char *rsc_id, const char *host, const char *move_lifetime, cib_t * cib_conn, int cib_options, gboolean promoted_role_only) { char *later_s = parse_cli_lifetime(out, move_lifetime); int rc = pcmk_rc_ok; xmlNode *location = NULL; xmlNode *fragment = NULL; if(move_lifetime && later_s == NULL) { return EINVAL; } if(cib_conn == NULL) { free(later_s); return ENOTCONN; } fragment = create_xml_node(NULL, XML_CIB_TAG_CONSTRAINTS); location = create_xml_node(fragment, XML_CONS_TAG_RSC_LOCATION); crm_xml_set_id(location, "cli-prefer-%s", rsc_id); crm_xml_add(location, XML_LOC_ATTR_SOURCE, rsc_id); if(promoted_role_only) { - crm_xml_add(location, XML_RULE_ATTR_ROLE, RSC_ROLE_PROMOTED_LEGACY_S); + crm_xml_add(location, XML_RULE_ATTR_ROLE, promoted_role_name()); } else { crm_xml_add(location, XML_RULE_ATTR_ROLE, RSC_ROLE_STARTED_S); } if (later_s == NULL) { /* Short form */ crm_xml_add(location, XML_CIB_TAG_NODE, host); crm_xml_add(location, XML_RULE_ATTR_SCORE, CRM_INFINITY_S); } else { xmlNode *rule = create_xml_node(location, XML_TAG_RULE); xmlNode *expr = create_xml_node(rule, XML_TAG_EXPRESSION); crm_xml_set_id(rule, "cli-prefer-rule-%s", rsc_id); crm_xml_add(rule, XML_RULE_ATTR_SCORE, CRM_INFINITY_S); crm_xml_add(rule, XML_RULE_ATTR_BOOLEAN_OP, "and"); crm_xml_set_id(expr, "cli-prefer-expr-%s", rsc_id); crm_xml_add(expr, XML_EXPR_ATTR_ATTRIBUTE, CRM_ATTR_UNAME); crm_xml_add(expr, XML_EXPR_ATTR_OPERATION, "eq"); crm_xml_add(expr, XML_EXPR_ATTR_VALUE, host); crm_xml_add(expr, XML_EXPR_ATTR_TYPE, "string"); expr = create_xml_node(rule, "date_expression"); crm_xml_set_id(expr, "cli-prefer-lifetime-end-%s", rsc_id); crm_xml_add(expr, "operation", "lt"); crm_xml_add(expr, "end", later_s); } crm_log_xml_info(fragment, "Modify"); rc = cib_conn->cmds->update(cib_conn, XML_CIB_TAG_CONSTRAINTS, fragment, cib_options); rc = pcmk_legacy2rc(rc); free_xml(fragment); free(later_s); return rc; } /* Nodes can be specified two different ways in the CIB, so we have two different * functions to try clearing out any constraints on them: * * (1) The node could be given by attribute=/value= in an expression XML node. * That's what resource_clear_node_in_expr handles. That XML looks like this: * * * * * * * * * (2) The mode could be given by node= in an rsc_location XML node. That's * what resource_clear_node_in_location handles. That XML looks like this: * * * * \return Standard Pacemaker return code */ static int resource_clear_node_in_expr(const char *rsc_id, const char *host, cib_t * cib_conn, int cib_options) { int rc = pcmk_rc_ok; char *xpath_string = NULL; xpath_string = crm_strdup_printf("//rsc_location[@id='cli-prefer-%s'][rule[@id='cli-prefer-rule-%s']/expression[@attribute='#uname' and @value='%s']]", rsc_id, rsc_id, host); rc = cib_conn->cmds->remove(cib_conn, xpath_string, NULL, cib_xpath | cib_options); if (rc == -ENXIO) { rc = pcmk_rc_ok; } else { rc = pcmk_legacy2rc(rc); } free(xpath_string); return rc; } // \return Standard Pacemaker return code static int resource_clear_node_in_location(const char *rsc_id, const char *host, cib_t * cib_conn, int cib_options, bool clear_ban_constraints, gboolean force) { int rc = pcmk_rc_ok; xmlNode *fragment = NULL; xmlNode *location = NULL; fragment = create_xml_node(NULL, XML_CIB_TAG_CONSTRAINTS); if (clear_ban_constraints == TRUE) { location = create_xml_node(fragment, XML_CONS_TAG_RSC_LOCATION); crm_xml_set_id(location, "cli-ban-%s-on-%s", rsc_id, host); } location = create_xml_node(fragment, XML_CONS_TAG_RSC_LOCATION); crm_xml_set_id(location, "cli-prefer-%s", rsc_id); if (force == FALSE) { crm_xml_add(location, XML_CIB_TAG_NODE, host); } crm_log_xml_info(fragment, "Delete"); rc = cib_conn->cmds->remove(cib_conn, XML_CIB_TAG_CONSTRAINTS, fragment, cib_options); if (rc == -ENXIO) { rc = pcmk_rc_ok; } else { rc = pcmk_legacy2rc(rc); } free(fragment); return rc; } // \return Standard Pacemaker return code int cli_resource_clear(const char *rsc_id, const char *host, GList *allnodes, cib_t * cib_conn, int cib_options, bool clear_ban_constraints, gboolean force) { int rc = pcmk_rc_ok; if(cib_conn == NULL) { return ENOTCONN; } if (host) { rc = resource_clear_node_in_expr(rsc_id, host, cib_conn, cib_options); /* rc does not tell us whether the previous operation did anything, only * whether it failed or not. Thus, as long as it did not fail, we need * to try the second clear method. */ if (rc == pcmk_rc_ok) { rc = resource_clear_node_in_location(rsc_id, host, cib_conn, cib_options, clear_ban_constraints, force); } } else { GList *n = allnodes; /* Iterate over all nodes, attempting to clear the constraint from each. * On the first error, abort. */ for(; n; n = n->next) { pe_node_t *target = n->data; rc = cli_resource_clear(rsc_id, target->details->uname, NULL, cib_conn, cib_options, clear_ban_constraints, force); if (rc != pcmk_rc_ok) { break; } } } return rc; } static char * build_clear_xpath_string(xmlNode *constraint_node, const char *rsc, const char *node, gboolean promoted_role_only) { int offset = 0; char *xpath_string = NULL; char *first_half = NULL; char *rsc_role_substr = NULL; char *date_substr = NULL; if (pcmk__starts_with(ID(constraint_node), "cli-ban-")) { date_substr = crm_strdup_printf("//date_expression[@id='%s-lifetime']", ID(constraint_node)); } else if (pcmk__starts_with(ID(constraint_node), "cli-prefer-")) { date_substr = crm_strdup_printf("//date_expression[@id='cli-prefer-lifetime-end-%s']", crm_element_value(constraint_node, "rsc")); } else { return NULL; } first_half = calloc(1, XPATH_MAX); offset += snprintf(first_half + offset, XPATH_MAX - offset, "//rsc_location"); if (node != NULL || rsc != NULL || promoted_role_only == TRUE) { offset += snprintf(first_half + offset, XPATH_MAX - offset, "["); if (node != NULL) { if (rsc != NULL || promoted_role_only == TRUE) { offset += snprintf(first_half + offset, XPATH_MAX - offset, "@node='%s' and ", node); } else { offset += snprintf(first_half + offset, XPATH_MAX - offset, "@node='%s'", node); } } if (rsc != NULL && promoted_role_only == TRUE) { rsc_role_substr = crm_strdup_printf("@rsc='%s' and @role='%s'", - rsc, RSC_ROLE_PROMOTED_LEGACY_S); + rsc, promoted_role_name()); offset += snprintf(first_half + offset, XPATH_MAX - offset, "@rsc='%s' and @role='%s']", - rsc, RSC_ROLE_PROMOTED_LEGACY_S); + rsc, promoted_role_name()); } else if (rsc != NULL) { rsc_role_substr = crm_strdup_printf("@rsc='%s'", rsc); offset += snprintf(first_half + offset, XPATH_MAX - offset, "@rsc='%s']", rsc); } else if (promoted_role_only == TRUE) { rsc_role_substr = crm_strdup_printf("@role='%s'", - RSC_ROLE_PROMOTED_LEGACY_S); + promoted_role_name()); offset += snprintf(first_half + offset, XPATH_MAX - offset, - "@role='%s']", RSC_ROLE_PROMOTED_LEGACY_S); + "@role='%s']", promoted_role_name()); } else { offset += snprintf(first_half + offset, XPATH_MAX - offset, "]"); } } if (node != NULL) { if (rsc_role_substr != NULL) { xpath_string = crm_strdup_printf("%s|//rsc_location[%s]/rule[expression[@attribute='#uname' and @value='%s']]%s", first_half, rsc_role_substr, node, date_substr); } else { xpath_string = crm_strdup_printf("%s|//rsc_location/rule[expression[@attribute='#uname' and @value='%s']]%s", first_half, node, date_substr); } } else { xpath_string = crm_strdup_printf("%s%s", first_half, date_substr); } free(first_half); free(date_substr); free(rsc_role_substr); return xpath_string; } // \return Standard Pacemaker return code int cli_resource_clear_all_expired(xmlNode *root, cib_t *cib_conn, int cib_options, const char *rsc, const char *node, gboolean promoted_role_only) { xmlXPathObject *xpathObj = NULL; xmlNode *cib_constraints = NULL; crm_time_t *now = crm_time_new(NULL); int i; int rc = pcmk_rc_ok; cib_constraints = get_object_root(XML_CIB_TAG_CONSTRAINTS, root); xpathObj = xpath_search(cib_constraints, "//" XML_CONS_TAG_RSC_LOCATION); for (i = 0; i < numXpathResults(xpathObj); i++) { xmlNode *constraint_node = getXpathResult(xpathObj, i); xmlNode *date_expr_node = NULL; crm_time_t *end = NULL; char *xpath_string = NULL; xpath_string = build_clear_xpath_string(constraint_node, rsc, node, promoted_role_only); if (xpath_string == NULL) { continue; } date_expr_node = get_xpath_object(xpath_string, constraint_node, LOG_DEBUG); if (date_expr_node == NULL) { free(xpath_string); continue; } /* And then finally, see if the date expression is expired. If so, * clear the constraint. */ end = crm_time_new(crm_element_value(date_expr_node, "end")); if (crm_time_compare(now, end) == 1) { xmlNode *fragment = NULL; xmlNode *location = NULL; fragment = create_xml_node(NULL, XML_CIB_TAG_CONSTRAINTS); location = create_xml_node(fragment, XML_CONS_TAG_RSC_LOCATION); crm_xml_set_id(location, "%s", ID(constraint_node)); crm_log_xml_info(fragment, "Delete"); rc = cib_conn->cmds->remove(cib_conn, XML_CIB_TAG_CONSTRAINTS, fragment, cib_options); rc = pcmk_legacy2rc(rc); if (rc != pcmk_rc_ok) { free(xpath_string); goto done; } free_xml(fragment); } crm_time_free(end); free(xpath_string); } done: freeXpathObject(xpathObj); crm_time_free(now); return rc; }