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metal/mtce/src/pmon/pmon.h

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/*
* Copyright (c) 2014-2016 Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*
*/
/*
* This implements the CGCS process Monitor ; /usr/local/bin/pmond
*
* Call trace is as follows:
* daemon_init
* pmon_timer_init
* pmon_hdlr_init
* daemon_files_init
* daemon_signal_init
* daemon_configure
* ini_parse
* get_debug_options
* get_iface_macaddr
* get_iface_address
* get_iface_hostname
* socket_init
* pmon_msg_init
* event_port_init
* pulse_port_init
*
* daemon_service_run
* wait for goenable signal
* pmon_send_event ( READY )
* pmon_service
* _config_dir_load
* _config_files_load
* _forever
* service_events
* pmon_send_pulse
* pmon_send_hostwd
*
* This daemon waits for a "goenabled" signal an then reads all the process
* configuration files in /etc/pmon.d and begins monitoring them accordingly.
* A process confguration file is expected to contain the following information
* ...
* ...
* ...
*
* But who watches the watcher ? Well there is a built-in mechanism for that.
* A 'failing' or 'not running' Process Monitor Daemon (pmond) will lead to a
* degrade condition for that host.
*
* Here is how it works ...
*
* Step 1: pmond is in inittab so that it will be respawned if it dies.
*
* Step 2: While running pmond periodically sends a pulse message to the
* the local heartbeat Client (hbsClient).
*
* Note: The hbsClient pulse response message has a flags field with 1
* bit dedicated to indicate the presence of the pmond on that host.
*
* Step 3: Every time the hbsClient receives a pmond pulse message it sets
* the pmond bit in the flags field of its pulse response.
*
* Note: So if the pmond dies it stops sending its pulse message that the
* pmond bit in the pulse response flags will not be set.
*
* Step 4: The heartbeat agent (hbsAgent) looks at the pulse response flags.
* For every response that does not contain a pmond flag it increments
* the pmond 'missing' counter for that host.
*
* Step 5: Every time it sees the pmod flag it clears the counter.
* If that counter reaches PMOND_MISSING_THRESHOLD then that host
* is set to degraded. The degrade condition is cleared as soon
* as a single pmond flag is observed.
*
*/
/**
* @file
* Wind River CGCS Platform Process Monitor Service Header
*/
#include <iostream>
#include <string.h>
#include <stdio.h>
#include <signal.h> /* for .. signaling */
#include <unistd.h> /* for .. close and usleep */
#include <stdlib.h> /* for .. system */
#include <dirent.h> /* for config dir reading */
#include <list> /* for the list of conf file names */
#include <syslog.h> /* for ... syslog */
#include <sys/wait.h> /* for ... waitpid */
#include <time.h> /* for ... time */
#include <sys/prctl.h> /* for program control header */
#include <sys/types.h> /* */
#include <sys/socket.h> /* for ... socket */
#include <linux/un.h> /* for ... domain socket type */
#include <netinet/in.h> /* for ... UDP socket type */
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netdb.h> /* for hostent */
#include <errno.h>
#include <sys/stat.h>
using namespace std;
/* external header APIs */
#include "fmAPI.h" /* for ... EFmAlarmSeverityT */
#include "nodeBase.h"
#include "daemon_ini.h" /* Ini Parser Header */
#include "daemon_common.h" /* Common definitions and types for daemons */
#include "daemon_option.h" /* Common options for daemons */
#include "nodeTimers.h" /* maintenance timer utilities start/stop */
#include "nodeUtil.h" /* common utilities */
#include "msgClass.h"
/**
* @addtogroup pmon_base
* @{
*/
#ifdef __AREA__
#undef __AREA__
#endif
#define __AREA__ "mon"
#ifndef UNUSED
#define UNUSED(_x_) ((void) _x_)
#endif
#define AMON_MAGIC_NUM 0x12345678
#define CONFIG_DIR ((const char *)"/etc/pmon.d")
#define PMON_CLEAR (0)
#define PMON_ASSERT (1)
#define PMON_LOG (2)
#define PMON_MAX_ALARMS (100)
/* Notification of Death Of Arbitrary Process */
/* Newer kernel headers expose the PR_DO_NOTIFY_TASK_STATE macro and the
* task_state_notify_info structure to user-space via the prctl.h header, so
* guard the definition of the macro and the structure with a pre-processor
* condition to avoid redefinition-related compilation errors.
*/
#ifndef PR_DO_NOTIFY_TASK_STATE
/* New PRCTL Flag
*
* Set/get notification for task state changes */
#define PR_DO_NOTIFY_TASK_STATE 17
/* This is the data structure for requestion process death
* (and other state change) information. Sig of -1 means
* query, sig of 0 means deregistration, positive sig means
* that you want to set it. sig and events are value-result
* and will be updated with the previous values on every
* successful call.
*/
struct task_state_notify_info
{
pid_t pid ;
int sig ;
unsigned int events;
};
#endif /* !PR_DO_NOTIFY_TASK_STATE */
/* The "events" bits in the struct correspond to the si_code values in the siginfo_t struct
* that would normally be sent along with a SIGCHLD to the parent process.
* The bits are mapped like this:
*
* 1 << (info->si_code & 0xFF)
The possible si_code values are defined in /usr/include/bits/siginfo.h and are:
enum
{
CLD_EXITED = 1, Child has exited.
CLD_KILLED, Child was killed.
CLD_DUMPED, Child terminated abnormally.
CLD_TRAPPED, Traced child has trapped.
CLD_STOPPED, Child has stopped.
CLD_CONTINUED Stopped child has continued.
};
*/
/* So declare a corresponding set of constants: */
#define MON_EXITED 0x2
#define MON_KILLED 0x4
#define MON_DUMPED 0x8
#define MON_TRAPPED 0x10
#define MON_STOPPED 0x20
#define MON_CONTINUED 0x40
typedef enum
{
PMOND_RECOVERY_METHOD__SYSVINIT = 0,
PMOND_RECOVERY_METHOD__SYSTEMD = 1,
} recovery_method_type ;
#define SYSTEMD_SERVICE_FILE_DIR1 ((const char *)"/etc/systemd/system")
#define SYSTEMD_SERVICE_FILE_DIR2 ((const char *)"/usr/lib/systemd/system")
/*
* Used to mark a configured process
* This aids in freeing duped memory over a process re-config
*/
#define PMOND_INIT_CHECK (0xBABE )
/* Note: Any addition to this struct requires explicit
* init in daemon_init.
* Cannot memset a struct contianing a string type.
**/
typedef struct
{
system_type_enum system_type ; /**< store the system type */
system_state_enum system_state; /**< current system state */
/* iface attributes ; hostname, ip and mac address */
char my_hostname [MAX_HOST_NAME_SIZE+1];
string my_macaddr ; /**< MAC address of event port */
string my_address ; /**< IP address daemon is running on */
int pulse_period ; /**< send_pulse interval in millisecs */
int processes ; /**< Number of Monitored Processes */
bool run_audit ; /**< Forces get_events audit to run */
struct sigaction info ; /**< This daemon signal action struct */
struct sigaction prev ; /**< Action handler that was replaced */
/**< This is put back on the exit */
bool event_mode ; /**< true=event mode ; false=polling */
int fd ; /**< inotify file descriptor */
int wd ; /**< inotify watch descriptor */
unsigned int nodetype ;
unsigned int function ;
unsigned int subfunction ;
recovery_method_type recovery_method ; /**< How processes are recovered */
bool reload_config ;
bool patching_in_progress ;
bool last_alarm_query_pass;
} pmon_ctrl_type ;
void pmon_set_ctrl_ptr ( pmon_ctrl_type * ctrl_ptr );
#define PMON_RT_SIGNAL (SIGRTMIN+1)
#define PMON_EVENT_FLAGS ( MON_EXITED | MON_KILLED )
// MON_DUMPED
// MON_STOPPED
// MON_TRAPPED
int setup_signal_handler ( int rt_signal_num );
#define MAX_CONFIG_LEN (256)
#define MAX_PROCESSES (100)
#define MAX_STATUS_ERROR_TEXT_LEN 128
#define MAX_COMMAND_LEN (512)
/* Daemon Config Bit Masks */
#define CONFIG_AUDIT_PERIOD 0x1
#define CONFIG_TX_PORT 0x2
#define CONFIG_RX_PORT 0x4
#define CONFIG_PULSE_PORT 0x8
#define CONFIG_MULTICAST 0x10
#define CONFIG_START_DELAY 0x20
#define CONFIG_HOSTWD_PERIOD 0x40
#define CONFIG_CMD_PORT 0x80
/** Daemon Config Mask */
#define CONFIG_MASK (CONFIG_AUDIT_PERIOD |\
CONFIG_TX_PORT |\
CONFIG_RX_PORT |\
CONFIG_PULSE_PORT |\
CONFIG_START_DELAY |\
CONFIG_CMD_PORT |\
CONFIG_HOSTWD_PERIOD)
/* Monitored Process Config Bit Mask */
#define CONF_PROCESS (0x0001)
#define CONF_RECOVERY (0x0002)
#define CONF_STYLE (0x0004)
#define CONF_PIDFILE (0x0008)
#define CONF_RESTARTS (0x0010)
#define CONF_SEVERITY (0x0020)
#define CONF_INTERVAL (0x0040)
#define CONF_DEBOUNCE (0x0080)
#define CONF_STARTTIME (0x0100)
#define CONF_MODE (0x0200)
#define CONF_STATUS_ARG (0x0400)
#define CONF_START_ARG (0x0800)
#define CONF_TIMEOUT (0x1000)
#define CONF_THRESHOLD (0x2000)
#define CONF_PERIOD (0x4000)
#define CONF_PORT (0x8000)
/* Monitored Passive Process Config Mask */
#define CONF_MASK (CONF_PROCESS | \
CONF_STYLE | \
CONF_RECOVERY | \
CONF_PIDFILE | \
CONF_SEVERITY | \
CONF_RESTARTS | \
CONF_INTERVAL | \
CONF_DEBOUNCE)
/* Monitored Active Process Config Mask */
#define CONF_AMON_MASK (CONF_PORT | \
CONF_PERIOD | \
CONF_TIMEOUT | \
CONF_THRESHOLD)
/* Monitored Status Process Config Mask */
#define CONF_STATUS_MON_MASK (CONF_PROCESS | \
CONF_STYLE | \
CONF_RECOVERY | \
CONF_SEVERITY | \
CONF_RESTARTS | \
CONF_INTERVAL | \
CONF_PERIOD | \
CONF_TIMEOUT | \
CONF_START_ARG | \
CONF_STATUS_ARG)
#define SEVERITY_CLEAR 0
#define SEVERITY_MINOR 1
#define SEVERITY_MAJOR 2
#define SEVERITY_CRITICAL 3
#define PMON_RESTART_WAIT (10)
#define MINORLOG_THRESHOLD (20)
#define PIDWAIT_THRESHOLD (15)
#define MAX_RESPAWN_SECS (5)
typedef enum
{
PMON_STAGE__START = 0,
PMON_STAGE__MANAGE = 1,
PMON_STAGE__RESPAWN = 2,
PMON_STAGE__MONITOR_WAIT = 3,
PMON_STAGE__MONITOR = 4,
PMON_STAGE__RESTART_WAIT = 5,
PMON_STAGE__IGNORE = 6,
PMON_STAGE__FINISH = 7,
PMON_STAGE__POLLING = 8,
PMON_STAGE__START_WAIT = 9,
PMON_STAGE__TIMER_WAIT =10,
PMON_STAGE__STAGES =11,
} passiveStage_enum ;
typedef enum
{
ACTIVE_STAGE__IDLE,
ACTIVE_STAGE__START_MONITOR,
ACTIVE_STAGE__PULSE_REQUEST,
ACTIVE_STAGE__REQUEST_WAIT,
ACTIVE_STAGE__PULSE_RESPONSE,
ACTIVE_STAGE__GAP_SETUP,
ACTIVE_STAGE__GAP_WAIT,
ACTIVE_STAGE__FAILED,
ACTIVE_STAGE__DEBOUNCE_SETUP,
ACTIVE_STAGE__DEBOUNCE,
ACTIVE_STAGE__FINISH,
ACTIVE_STAGE__STAGES,
} activeStage_enum ;
/** Status monitoring states */
typedef enum
{
STATUS_STAGE__BEGIN,
STATUS_STAGE__EXECUTE_STATUS,
STATUS_STAGE__EXECUTE_STATUS_WAIT,
STATUS_STAGE__EXECUTE_START,
STATUS_STAGE__EXECUTE_START_WAIT,
STATUS_STAGE__INTERVAL_WAIT,
STATUS_STAGE__STAGES,
} statusStage_enum ;
#define AMON_MAX_LEN (100)
typedef struct
{
int tx_sock ; /**< socket to monitored process */
int tx_port ; /**< port to monitored process */
struct sockaddr_in tx_addr ; /**< process socket attributes */
char tx_buf[AMON_MAX_LEN]; /**< Server receive buffer */
socklen_t len ; /**< Socket Length */
} active_mon_socket_type ;
/* Process Specific Monitor Configuration - Static and Dynamic Data */
typedef struct
{
unsigned short init_check; /**< checksum of the process config */
unsigned int mask ; /**< Passive monitor config read mask */
passiveStage_enum stage ; /**< Passive monitor FSM stage control */
/* Config Items */
const char * process ; /**< The name of the process to monitor */
const char * service ; /**< The name of the service to monitor
This is used in centos systemd and
when it comes to respawning processes
this takes precidence if it is not null */
const char * script ; /**< Path to and restart script filename */
const char * style ; /**< recovery method ; lsb, ocf, systemd */
const char * pidfile ; /**< The path to process pidfile */
const char * severity ; /**< Process failure severity
critical : host is failed
major : host is degraded
minor : log is generated */
unsigned int restarts ; /**< Number of back to back unsuccessful
restarts before severity assertion */
unsigned int interval ; /**< Number of seconds to wait between
back-to-back unsuccessful restarts */
unsigned int debounce ; /**< Number of seconds the process needs
to run before declaring it as running
O.K. after a restart. Time after
which back-to-back restart count is
cleared. */
unsigned int startuptime ; /**< Seconds to wait after process start
before starting the debounce monitor*/
const char * mode ; /**< Monitor mode passive or active.
Passive mode is always performed and
assumed if setting is not specified */
const char * subfunction ; /**< contains a string specifying the subfunction
of the host */
bool quorum ; /**< Whether or not the process is in the
system health quorum (for host watchdog) */
bool quorum_failure ; /**< flag indicating that a quorum
process has failed. Implements a
single audit debounce for quorum
process failures */
bool quorum_unrecoverable ; /**< flag indicating that a quorum
process has been declared unrecoverable */
bool full_init_reqd ; /**< Whether or not we should wait for full
goenabled tests passing before we should
try to restart process */
/** Passive Monitoring Dynamic Data */
/* ------------------------------- */
bool passive_monitoring ; /**< set true when being monitored */
struct mtc_timer * pt_ptr ; /**< fsm and handler process timer pointer */
/** holds the alarm severity state of CLEAR, MINOR, MAJOR, CRITICAL */
EFmAlarmSeverityT alarm_severity ;
bool restart ;
bool registered ; /**< true if pid is registered with kernel */
bool failed ;
bool ignore ; /**< ignore this process ; debug purposes */
bool stopped ; /**< process was stopped by command */
unsigned int restarts_cnt ; /**< back to back restarts count */
unsigned int debounce_cnt ; /**< running monitor debounce count */
unsigned int minorlog_cnt ; /**< track minor log count for thresholding */
unsigned int pidwait_cnt ; /**< throttle pidwait logs indicating that
spawned child has not exited yet
preventing respawn of new process */
bool sigchld_rxed ; /**< Child respawn exit received */
unsigned int stage_cnt ; /**< general stage specific count */
unsigned int failed_cnt ; /**< number of times process has failed */
int child_pid ; /**< Restart scriptm chile process ID (obs) */
int pid ; /**< The PID of the this process */
int sev ; /**< Translated severity code; MAJ,MIN,CRIT */
int status ; /**< exit status */
/* Active Monitoring Config Members */
/* -------------------------------- */
bool active_monitoring ; /**< true if active monitoring enabled */
unsigned int amask ; /**< Active monitoring config mask */
int port ; /**< Heartbeat period in seconds */
/* period and timeout is also used in Status Monitoring */
unsigned int period ; /**< Heartbeat period in seconds */
unsigned int timeout ; /**< Heartbeat timeout in seconds */
unsigned int threshold ; /**< Number of back to back heartbeat
failures before action */
/** Active Monitoring UNIX Domain socket */
/* ------------------------------------ */
active_mon_socket_type msg ; /**< Active monitoring messaging interface */
/* Active Monitoring Dynamic Data */
/* ------------------------------ */
activeStage_enum active_stage ; /**< Passive Monitor FSM Stage Control */
bool active_failed ; /**< Active monitoring failed signal */
unsigned int tx_sequence ; /**< outgoing sequence number */
unsigned int rx_sequence ; /**< incoming sequence number */
bool waiting ; /**< waiting for response */
unsigned int pulse_count ; /**< running pulse count */
unsigned int b2b_miss_peak ; /**< max number of back to back misses */
unsigned int b2b_miss_count ; /**< current back to back miss count */
unsigned int afailed_count ; /**< total active mon'ing failed count */
unsigned int recv_err_cnt ; /**< counts the receive errors */
unsigned int send_err_cnt ; /**< counts the transmit errors */
unsigned int mesg_err_cnt ; /**< response message error count */
unsigned int mesg_err_peak ; /**< response message error count */
unsigned int adebounce_cnt ; /**< active monitor debounce counter */
bool active_debounce ; /**< true = in active mon'ing debounce */
bool active_response ; /**< set true on first active response */
time_debug_type time_start ; /**< launch start time */
time_debug_type time_stop ; /**< launch stop time */
time_delta_type time_delta ; /**< launch execution time */
/* Status Monitoring */
const char * start_arg ; /**< start argument for the script */
const char * status_arg ; /**< status argument for the script */
const char * status_failure_text_file; /**< path to status failure text file */
unsigned int status_mask ; /**< Status monitoring config mask */
statusStage_enum status_stage ; /**< Status Monitor FSM Stage Control */
bool status_monitoring ; /**< true if status monitoring */
bool status_failed ;
bool was_failed ; /**< indicates the process was in the failed state */
#define AUDIT_EVENT_SEND_REFESH_THRESHOLD (3)
int audit_alarm_refresh_count ; /**< audit event send refresh counter */
const char * recovery_method ; /**< the process/service recovery method */
} process_config_type ;
process_config_type * get_process_config_ptr ( int index );
process_config_type * get_process_config_ptr ( string process );
int pmon_process_config ( void * user,
const char * section,
const char * name,
const char * value);
/* pmonHdlr.cpp API */
void pmon_timer_init( void );
int pmon_hdlr_init ( pmon_ctrl_type * ctrl_ptr );
void pmon_hdlr_fini ( pmon_ctrl_type * ctrl_ptr );
void pmon_service ( pmon_ctrl_type * ctrl_ptr );
/* pmonMsg.cpp API */
int pmon_inbox_init ( void );
void pmon_service_inbox ( void );
/** Daemon Service messaging socket control structure */
typedef struct
{
/** PMON Command Receive Interface - (UDP over 'lo') */
msgClassSock* cmd_sock; /**< receive pmon commands socket */
int cmd_port; /**< command receive port */
/** UDP socket used to send pmond events to maintenance */
msgClassSock* event_sock; /**< Tx Event Socket */
int event_port; /**< Tx Event Port number */
/** UDP Inet "Im Alive" pulse message interface */
int pulse_port; /**< Pmon I'm Alive Pulse Port */
msgClassSock* pulse_sock; /**< Pmon I'm Alive Pulse Sock */
mtc_message_type pulse ; /**< Static pulse message */
int msg_len ; /**< Pulse message length */
/** UDP socket used to send pmond events to maintenance */
int amon_sock; /**< Active monitor Rx Socket */
int amon_port; /**< Active Monitor Rx Port */
struct sockaddr_in amon_addr; /**< Active Monitor Attributes */
/** Unix socket used to send pmond status to hostwd */
int hostwd_sock;
char* hostwd_path;
struct sockaddr_un hostwd_addr;
// msgClassSock* mtclogd_sock; /**< sage to mtclogd */
msgSock_type mtclogd ;
} pmon_socket_type ;
pmon_socket_type * pmon_getSock_ptr ( void );
pmon_ctrl_type * get_ctrl_ptr ( void ) ;
void pmon_msg_init ( void );
void pmon_msg_fini ( void );
int pulse_port_init ( void ) ;
int event_port_init ( const char * iface , int port );
int amon_port_init ( int port );
int hostwd_port_init ( void );
int pmon_send_event ( unsigned int event_cmd , process_config_type * ptr );
void close_process_socket ( process_config_type * ptr );
int open_process_socket ( process_config_type * ptr );
void manage_process_failure ( process_config_type * ptr );
int register_process ( process_config_type * ptr );
int unregister_process ( process_config_type * ptr );
int respawn_process ( process_config_type * ptr );
int get_process_pid ( process_config_type * ptr );
bool process_running ( process_config_type * ptr );
int manage_alarm ( process_config_type * ptr, int action );
int process_config_load ( process_config_type * ptr, const char * config_file_ptr);
bool want_degrade_clear ( void ) ;
string get_status_failure_text ( process_config_type * ptr );
void kill_running_child ( process_config_type * ptr );
bool kill_running_process ( int pid );
int amon_service_inbox ( int processes );
/** Process monitor timer handler */
void pmon_timer_handler ( int sig, siginfo_t *si, void *uc);
/** FSM Handler for Passive Monitoring */
int pmon_passive_handler ( process_config_type * ptr );
/** Passive Monitoring FSM Stage Transition Utility */
int passiveStageChange ( process_config_type * ptr , passiveStage_enum newStage );
const char * get_pmonStage_str ( process_config_type * ptr );
/** FSM Handler for Active Monitoring */
int pmon_active_handler ( process_config_type * ptr );
/** Active Monitoring FSM Stage Transition Utility */
int activeStageChange ( process_config_type * ptr , activeStage_enum newStage );
const char * get_amonStage_str ( process_config_type * ptr );
int amon_send_request ( process_config_type * ptr );
/** FSM Handler for Status Monitoring */
int pmon_status_handler ( process_config_type * ptr );
/** Status Monitoring FSM Stage Transition Utility */
int statusStageChange ( process_config_type * ptr , statusStage_enum newStage );
/** Status Monitoring Commands */
int execute_status_command ( process_config_type * ptr );
int execute_start_command ( process_config_type * ptr );
void quorum_process_failure ( process_config_type * ptr );
#define PMON_MIN_ACTIVE_PERIOD (1)
#define PMON_MAX_ACTIVE_PERIOD (120)
#define PMON_MIN_START_DELAY (1)
#define PMON_MAX_START_DELAY (120)
#define PMON_MIN_AUDIT_PERIOD (50)
#define PMON_MAX_AUDIT_PERIOD (999)
int pmon_send_pulse ( void ) ;
int pmon_send_hostwd ( void ) ;
/** Message versions */
#define MTC_MSG_VERSION_15_12_GA_PMON (1)
#define MTC_MSG_REVISION_15_12_GA_PMON (1)
/**
* @} pmon_base
*/
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