daemons/controld/controld

/* */
This source file includes following definitions.
do_cib_updated
do_cib_replaced
controld_disconnect_cib_manager
do_cib_control
crmd_cib_smart_opt
controld_action_is_recordable
cib_delete_callback
controld_delete_node_state
controld_delete_resource_history
   1 /*
   2  * Copyright 2004-2020 the Pacemaker project contributors
   3  *
   4  * The version control history for this file may have further details.
   5  *
   6  * This source code is licensed under the GNU General Public License version 2
   7  * or later (GPLv2+) WITHOUT ANY WARRANTY.
   8  */
   9 
  10 #include <crm_internal.h>
  11 
  12 #include <unistd.h>  /* sleep */
  13 
  14 #include <crm/common/alerts_internal.h>
  15 #include <crm/common/xml.h>
  16 #include <crm/crm.h>
  17 #include <crm/msg_xml.h>
  18 
  19 #include <pacemaker-controld.h>
  20 
  21 int cib_retries = 0;
  22 
  23 void
  24 do_cib_updated(const char *event, xmlNode * msg)
     /*  */
  25 {
  26     if (pcmk__alert_in_patchset(msg, TRUE)) {
  27         mainloop_set_trigger(config_read);
  28     }
  29 }
  30 
  31 void
  32 do_cib_replaced(const char *event, xmlNode * msg)
     /*  */
  33 {
  34     int change_section = cib_change_section_nodes | cib_change_section_status;
  35 
  36     crm_debug("Updating the CIB after a replace: DC=%s", pcmk__btoa(AM_I_DC));
  37     if (AM_I_DC == FALSE) {
  38         return;
  39 
  40     } else if ((fsa_state == S_FINALIZE_JOIN)
  41                && pcmk_is_set(fsa_input_register, R_CIB_ASKED)) {
  42         /* no need to restart the join - we asked for this replace op */
  43         return;
  44     }
  45 
  46     crm_element_value_int(msg, F_CIB_CHANGE_SECTION, &change_section);
  47     if (change_section & (cib_change_section_nodes | cib_change_section_status)) {
  48         /* start the join process again so we get everyone's LRM status */
  49         populate_cib_nodes(node_update_quick|node_update_all, __func__);
  50 
  51         register_fsa_input(C_FSA_INTERNAL, I_ELECTION, NULL);
  52     }
  53 }
  54 
  55 void
  56 controld_disconnect_cib_manager(void)
     /*  */
  57 {
  58     CRM_ASSERT(fsa_cib_conn != NULL);
  59 
  60     crm_info("Disconnecting from the CIB manager");
  61 
  62     controld_clear_fsa_input_flags(R_CIB_CONNECTED);
  63 
  64     fsa_cib_conn->cmds->del_notify_callback(fsa_cib_conn, T_CIB_REPLACE_NOTIFY, do_cib_replaced);
  65     fsa_cib_conn->cmds->del_notify_callback(fsa_cib_conn, T_CIB_DIFF_NOTIFY, do_cib_updated);
  66     cib_free_callbacks(fsa_cib_conn);
  67     if (fsa_cib_conn->state != cib_disconnected) {
  68         /* Does not require a set_slave() reply to sign out from based. */
  69         fsa_cib_conn->cmds->set_slave(fsa_cib_conn, cib_scope_local | cib_discard_reply);
  70         fsa_cib_conn->cmds->signoff(fsa_cib_conn);
  71     }
  72 
  73     crm_notice("Disconnected from the CIB manager");
  74 }
  75 
  76 /* A_CIB_STOP, A_CIB_START, O_CIB_RESTART */
  77 void
  78 do_cib_control(long long action,
     /*  */
  79                enum crmd_fsa_cause cause,
  80                enum crmd_fsa_state cur_state,
  81                enum crmd_fsa_input current_input, fsa_data_t * msg_data)
  82 {
  83     CRM_ASSERT(fsa_cib_conn != NULL);
  84 
  85     if (action & A_CIB_STOP) {
  86 
  87         if (fsa_cib_conn->state != cib_disconnected && last_resource_update != 0) {
  88             crm_info("Waiting for resource update %d to complete", last_resource_update);
  89             crmd_fsa_stall(FALSE);
  90             return;
  91         }
  92 
  93         controld_disconnect_cib_manager();
  94 
  95     }
  96 
  97     if (action & A_CIB_START) {
  98         int rc = pcmk_ok;
  99 
 100         if (cur_state == S_STOPPING) {
 101             crm_err("Ignoring request to connect to the CIB manager after shutdown");
 102             return;
 103         }
 104 
 105         rc = fsa_cib_conn->cmds->signon(fsa_cib_conn, CRM_SYSTEM_CRMD, cib_command_nonblocking);
 106 
 107         if (rc != pcmk_ok) {
 108             /* a short wait that usually avoids stalling the FSA */
 109             sleep(1);
 110             rc = fsa_cib_conn->cmds->signon(fsa_cib_conn, CRM_SYSTEM_CRMD, cib_command_nonblocking);
 111         }
 112 
 113         if (rc != pcmk_ok) {
 114             crm_info("Could not connect to the CIB manager: %s", pcmk_strerror(rc));
 115 
 116         } else if (pcmk_ok !=
 117                    fsa_cib_conn->cmds->set_connection_dnotify(fsa_cib_conn,
 118                                                               crmd_cib_connection_destroy)) {
 119             crm_err("Could not set dnotify callback");
 120 
 121         } else if (pcmk_ok !=
 122                    fsa_cib_conn->cmds->add_notify_callback(fsa_cib_conn, T_CIB_REPLACE_NOTIFY,
 123                                                            do_cib_replaced)) {
 124             crm_err("Could not set CIB notification callback (replace)");
 125 
 126         } else if (pcmk_ok !=
 127                    fsa_cib_conn->cmds->add_notify_callback(fsa_cib_conn, T_CIB_DIFF_NOTIFY,
 128                                                            do_cib_updated)) {
 129             crm_err("Could not set CIB notification callback (update)");
 130 
 131         } else {
 132             controld_set_fsa_input_flags(R_CIB_CONNECTED);
 133             cib_retries = 0;
 134         }
 135 
 136         if (!pcmk_is_set(fsa_input_register, R_CIB_CONNECTED)) {
 137 
 138             cib_retries++;
 139             crm_warn("Couldn't complete CIB registration %d"
 140                      " times... pause and retry", cib_retries);
 141 
 142             if (cib_retries < 30) {
 143                 controld_start_timer(wait_timer);
 144                 crmd_fsa_stall(FALSE);
 145 
 146             } else {
 147                 crm_err("Could not complete CIB"
 148                         " registration  %d times..." " hard error", cib_retries);
 149                 register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL);
 150             }
 151         }
 152     }
 153 }
 154 
 155 /*!
 156  * \internal
 157  * \brief Get CIB call options to use local scope if master unavailable
 158  *
 159  * \return CIB call options
 160  */
 161 int crmd_cib_smart_opt()
     /*  */
 162 {
 163     int call_opt = cib_quorum_override;
 164 
 165     if (fsa_state == S_ELECTION || fsa_state == S_PENDING) {
 166         crm_info("Sending update to local CIB in state: %s", fsa_state2string(fsa_state));
 167         cib__set_call_options(call_opt, "update", cib_scope_local);
 168     }
 169     return call_opt;
 170 }
 171 
 172 /*!
 173  * \internal
 174  * \brief Check whether an action type should be recorded in the CIB
 175  *
 176  * \param[in] action  Action type
 177  *
 178  * \return TRUE if action should be recorded, FALSE otherwise
 179  */
 180 bool
 181 controld_action_is_recordable(const char *action)
     /*  */
 182 {
 183     return !pcmk__strcase_any_of(action, CRMD_ACTION_CANCEL, CRMD_ACTION_DELETE,
 184                             CRMD_ACTION_NOTIFY, CRMD_ACTION_METADATA, NULL);
 185 }
 186 
 187 static void
 188 cib_delete_callback(xmlNode *msg, int call_id, int rc, xmlNode *output,
     /*  */
 189                     void *user_data)
 190 {
 191     char *desc = user_data;
 192 
 193     if (rc == 0) {
 194         crm_debug("Deletion of %s (via CIB call %d) succeeded", desc, call_id);
 195     } else {
 196         crm_warn("Deletion of %s (via CIB call %d) failed: %s " CRM_XS " rc=%d",
 197                  desc, call_id, pcmk_strerror(rc), rc);
 198     }
 199 }
 200 
 201 // Searches for various portions of node_state to delete
 202 
 203 // Match a particular node's node_state (takes node name 1x)
 204 #define XPATH_NODE_STATE        "//" XML_CIB_TAG_STATE "[@" XML_ATTR_UNAME "='%s']"
 205 
 206 // Node's lrm section (name 1x)
 207 #define XPATH_NODE_LRM          XPATH_NODE_STATE "/" XML_CIB_TAG_LRM
 208 
 209 // Node's lrm_rsc_op entries and lrm_resource entries without lock (name 2x)
 210 #define XPATH_NODE_LRM_UNLOCKED XPATH_NODE_STATE "//" XML_LRM_TAG_RSC_OP    \
 211                                 "|" XPATH_NODE_STATE                        \
 212                                 "//" XML_LRM_TAG_RESOURCE                   \
 213                                 "[not(@" XML_CONFIG_ATTR_SHUTDOWN_LOCK ")]"
 214 
 215 // Node's transient_attributes section (name 1x)
 216 #define XPATH_NODE_ATTRS        XPATH_NODE_STATE "/" XML_TAG_TRANSIENT_NODEATTRS
 217 
 218 // Everything under node_state (name 1x)
 219 #define XPATH_NODE_ALL          XPATH_NODE_STATE "/*"
 220 
 221 // Unlocked history + transient attributes (name 3x)
 222 #define XPATH_NODE_ALL_UNLOCKED XPATH_NODE_LRM_UNLOCKED "|" XPATH_NODE_ATTRS
 223 
 224 /*!
 225  * \internal
 226  * \brief Delete subsection of a node's CIB node_state
 227  *
 228  * \param[in] uname    Desired node
 229  * \param[in] section  Subsection of node_state to delete
 230  * \param[in] options  CIB call options to use
 231  */
 232 void
 233 controld_delete_node_state(const char *uname, enum controld_section_e section,
     /*  */
 234                            int options)
 235 {
 236     char *xpath = NULL;
 237     char *desc = NULL;
 238 
 239     CRM_CHECK(uname != NULL, return);
 240     switch (section) {
 241         case controld_section_lrm:
 242             xpath = crm_strdup_printf(XPATH_NODE_LRM, uname);
 243             desc = crm_strdup_printf("resource history for node %s", uname);
 244             break;
 245         case controld_section_lrm_unlocked:
 246             xpath = crm_strdup_printf(XPATH_NODE_LRM_UNLOCKED, uname, uname);
 247             desc = crm_strdup_printf("resource history (other than shutdown "
 248                                      "locks) for node %s", uname);
 249             break;
 250         case controld_section_attrs:
 251             xpath = crm_strdup_printf(XPATH_NODE_ATTRS, uname);
 252             desc = crm_strdup_printf("transient attributes for node %s", uname);
 253             break;
 254         case controld_section_all:
 255             xpath = crm_strdup_printf(XPATH_NODE_ALL, uname);
 256             desc = crm_strdup_printf("all state for node %s", uname);
 257             break;
 258         case controld_section_all_unlocked:
 259             xpath = crm_strdup_printf(XPATH_NODE_ALL_UNLOCKED,
 260                                       uname, uname, uname);
 261             desc = crm_strdup_printf("all state (other than shutdown locks) "
 262                                      "for node %s", uname);
 263             break;
 264     }
 265 
 266     if (fsa_cib_conn == NULL) {
 267         crm_warn("Unable to delete %s: no CIB connection", desc);
 268         free(desc);
 269     } else {
 270         int call_id;
 271 
 272         cib__set_call_options(options, "node state deletion",
 273                               cib_quorum_override|cib_xpath|cib_multiple);
 274         call_id = fsa_cib_conn->cmds->remove(fsa_cib_conn, xpath, NULL, options);
 275         crm_info("Deleting %s (via CIB call %d) " CRM_XS " xpath=%s",
 276                  desc, call_id, xpath);
 277         fsa_register_cib_callback(call_id, FALSE, desc, cib_delete_callback);
 278         // CIB library handles freeing desc
 279     }
 280     free(xpath);
 281 }
 282 
 283 // Takes node name and resource ID
 284 #define XPATH_RESOURCE_HISTORY "//" XML_CIB_TAG_STATE                       \
 285                                "[@" XML_ATTR_UNAME "='%s']/"                \
 286                                XML_CIB_TAG_LRM "/" XML_LRM_TAG_RESOURCES    \
 287                                "/" XML_LRM_TAG_RESOURCE                     \
 288                                "[@" XML_ATTR_ID "='%s']"
 289 // @TODO could add "and @XML_CONFIG_ATTR_SHUTDOWN_LOCK" to limit to locks
 290 
 291 /*!
 292  * \internal
 293  * \brief Clear resource history from CIB for a given resource and node
 294  *
 295  * \param[in]  rsc_id        ID of resource to be cleared
 296  * \param[in]  node          Node whose resource history should be cleared
 297  * \param[in]  user_name     ACL user name to use
 298  * \param[in]  call_options  CIB call options
 299  *
 300  * \return Standard Pacemaker return code
 301  */
 302 int
 303 controld_delete_resource_history(const char *rsc_id, const char *node,
     /*  */
 304                                  const char *user_name, int call_options)
 305 {
 306     char *desc = NULL;
 307     char *xpath = NULL;
 308     int rc = pcmk_rc_ok;
 309 
 310     CRM_CHECK((rsc_id != NULL) && (node != NULL), return EINVAL);
 311 
 312     desc = crm_strdup_printf("resource history for %s on %s", rsc_id, node);
 313     if (fsa_cib_conn == NULL) {
 314         crm_err("Unable to clear %s: no CIB connection", desc);
 315         free(desc);
 316         return ENOTCONN;
 317     }
 318 
 319     // Ask CIB to delete the entry
 320     xpath = crm_strdup_printf(XPATH_RESOURCE_HISTORY, node, rsc_id);
 321     rc = cib_internal_op(fsa_cib_conn, CIB_OP_DELETE, NULL, xpath, NULL,
 322                          NULL, call_options|cib_xpath, user_name);
 323 
 324     if (rc < 0) {
 325         rc = pcmk_legacy2rc(rc);
 326         crm_err("Could not delete resource status of %s on %s%s%s: %s "
 327                 CRM_XS " rc=%d", rsc_id, node,
 328                 (user_name? " for user " : ""), (user_name? user_name : ""),
 329                 pcmk_rc_str(rc), rc);
 330         free(desc);
 331         free(xpath);
 332         return rc;
 333     }
 334 
 335     if (pcmk_is_set(call_options, cib_sync_call)) {
 336         if (pcmk_is_set(call_options, cib_dryrun)) {
 337             crm_debug("Deletion of %s would succeed", desc);
 338         } else {
 339             crm_debug("Deletion of %s succeeded", desc);
 340         }
 341         free(desc);
 342 
 343     } else {
 344         crm_info("Clearing %s (via CIB call %d) " CRM_XS " xpath=%s",
 345                  desc, rc, xpath);
 346         fsa_register_cib_callback(rc, FALSE, desc, cib_delete_callback);
 347         // CIB library handles freeing desc
 348     }
 349 
 350     free(xpath);
 351     return pcmk_rc_ok;
 352 }
/* */
root/daemons/controld/controld_based.c

DEFINITIONS
