check_linux_mysqld_status(): fixes around systemctl handling, better error handling, corrected handling of DO_MYSQLCHECK, fix non-localhost process checking
This commit is contained in:
Patrick Van der Veken
parent
2135f56abe
commit
e3da7e7b94
@ -26,6 +26,9 @@
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# @(#) 2019-02-10: initial version [Patrick Van der Veken]
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# @(#) 2019-03-09: text files [Patrick Van der Veken]
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# @(#) 2019-03-16: replace 'which' [Patrick Van der Veken]
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# @(#) 2020-09-25: fixes around systemctl handling, better error handling,
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# corrected handling of _DO_MYSQLCHECK, fix non-localhost
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# process checking [Patrick Van der Veken]
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# -----------------------------------------------------------------------------
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# DO NOT CHANGE THIS FILE UNLESS YOU KNOW WHAT YOU ARE DOING!
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#******************************************************************************
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@ -39,7 +42,7 @@ typeset _MYSQLD_INIT_SCRIPT="/etc/init.d/mysqld"
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typeset _MYSQLD_SYSTEMD_SERVICE="mysqld.service"
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typeset _MARIADB_INIT_SCRIPT="/etc/init.d/mariadb"
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typeset _MARIADB_SYSTEMD_SERVICE="mariadb.service"
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typeset _VERSION="2019-03-16" # YYYY-MM-DD
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typeset _VERSION="2020-09-25" # YYYY-MM-DD
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typeset _SUPPORTED_PLATFORMS="Linux" # uname -s match
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# ------------------------- CONFIGURATION ends here ---------------------------
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@ -165,7 +168,6 @@ case "${_CFG_HEALTHY}" in
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(( _LOG_HEALTHY > 0 )) || _LOG_HEALTHY=0
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;;
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esac
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(( _DO_MYSQLCHECK == 0 )) && warn "mysqlcheck is disabled (as configured or due to missing mysql settings)"
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# log_healthy
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(( ARG_LOG_HEALTHY > 0 )) && _LOG_HEALTHY=1
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@ -190,78 +192,98 @@ then
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fi
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# ---- process state ----
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# 1) try using the init ways
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linux_get_init
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case "${LINUX_INIT}" in
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'systemd')
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# first try mysqld
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_CHECK_SYSTEMD_SERVICE=$(linux_has_systemd_service "${_MYSQLD_SYSTEMD_SERVICE}")
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if (( _CHECK_SYSTEMD_SERVICE > 0 ))
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then
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systemctl --quiet is-active ${_MYSQLD_SYSTEMD_SERVICE} 2>>${HC_STDERR_LOG} || _STC=1
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else
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# then try mariadb
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_CHECK_SYSTEMD_SERVICE=$(linux_has_systemd_service "${_MARIADB_SYSTEMD_SERVICE}")
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# don't check procs if table check on a non-localhost is requested
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if (( _DO_MYSQLCHECK > 0 )) && ( [[ "${_CFG_MYSQL_HOST}" != "localhost" ]] &&
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[[ "${_CFG_MYSQL_HOST}" != "127.0.0.1" ]] &&
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[[ "${_CFG_MYSQL_HOST}" != "::1" ]] )
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then
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warn "skipping process check because parameter 'mysql_host' is to a remote host in the configuration file ${_CONFIG_FILE}"
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else
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# 1) try using the init ways
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linux_get_init
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case "${LINUX_INIT}" in
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'systemd')
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# first try mysqld
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_CHECK_SYSTEMD_SERVICE=$(linux_has_systemd_service "${_MYSQLD_SYSTEMD_SERVICE}")
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if (( _CHECK_SYSTEMD_SERVICE > 0 ))
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then
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systemctl --quiet is-active ${_MARIADB_SYSTEMD_SERVICE} 2>>${HC_STDERR_LOG} || _STC=1
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else
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warn "systemd unit file not found {${_MYSQLD_SYSTEMD_SERVICE}}/${_MARIADB_SYSTEMD_SERVICE}}"
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_RC=1
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(( ARG_DEBUG > 0 )) && debug "doing systemd service check for mysqld"
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systemctl --quiet is-active ${_MYSQLD_SYSTEMD_SERVICE} 2>>${HC_STDERR_LOG} || _STC=1
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fi
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fi
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;;
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'upstart')
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warn "code for upstart managed systems not implemented, NOOP"
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return 1
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;;
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'sysv')
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# first check running mysqld
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if [[ -x ${_MYSQLD_INIT_SCRIPT} ]]
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then
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if (( $(${_MYSQLD_INIT_SCRIPT} status 2>>${HC_STDERR_LOG} | grep -c -i 'is running' 2>/dev/null) == 0 ))
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# then try mariadb (also if mysqld check fails which can happen with --is-active when mysqld & mariadb are both enabled)
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if (( _STC > 1 ))
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then
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_STC=1
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_CHECK_SYSTEMD_SERVICE=$(linux_has_systemd_service "${_MARIADB_SYSTEMD_SERVICE}")
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if (( _CHECK_SYSTEMD_SERVICE > 0 ))
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then
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(( ARG_DEBUG > 0 )) && debug "doing systemd service check for mariadbd"
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systemctl --quiet is-active ${_MARIADB_SYSTEMD_SERVICE} 2>>${HC_STDERR_LOG} || _STC=1
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else
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warn "systemd unit file not found {${_MYSQLD_SYSTEMD_SERVICE}}/${_MARIADB_SYSTEMD_SERVICE}}"
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_RC=1
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fi
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fi
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else
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if [[ -x ${_MARIADB_INIT_SCRIPT} ]]
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;;
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'upstart')
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warn "code for upstart managed systems not implemented, NOOP"
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# fall through to pgrep
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_RC=1
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;;
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'sysv')
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# first check running mysqld
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if [[ -x ${_MYSQLD_INIT_SCRIPT} ]]
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then
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if (( $(${_MARIADB_INIT_SCRIPT} status 2>>${HC_STDERR_LOG} | grep -c -i 'is running' 2>/dev/null) == 0 ))
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if (( $(${_MYSQLD_INIT_SCRIPT} status 2>>${HC_STDERR_LOG} | grep -c -i 'is running' 2>/dev/null) == 0 ))
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then
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_STC=1
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fi
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else
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warn "sysv init script not found {${_MYSQLD_INIT_SCRIPT}}/{${_MARIADB_INIT_SCRIPT}}"
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_RC=1
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if [[ -x ${_MARIADB_INIT_SCRIPT} ]]
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then
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if (( $(${_MARIADB_INIT_SCRIPT} status 2>>${HC_STDERR_LOG} | grep -c -i 'is running' 2>/dev/null) == 0 ))
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then
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_STC=1
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fi
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else
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warn "sysv init script not found {${_MYSQLD_INIT_SCRIPT}}/{${_MARIADB_INIT_SCRIPT}}"
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_RC=1
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fi
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fi
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fi
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;;
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*)
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_RC=1
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;;
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esac
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;;
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*)
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_RC=1
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;;
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esac
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# 2) try the pgrep way (note: old pgreps do not support '-c')
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if (( _RC > 0 ))
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then
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(( $(pgrep -u root mysqld 2>>${HC_STDERR_LOG} | wc -l 2>/dev/null) == 0 )) && _STC=1
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fi
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# 2) try the pgrep way (note: old pgreps do not support '-c')
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if (( _RC > 0 ))
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then
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(( ARG_DEBUG > 0 )) && debug "doing pgrep check for mysqld"
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(( $(pgrep -u root,mysql mysqld 2>>${HC_STDERR_LOG} | wc -l 2>/dev/null) == 0 )) && _STC=1
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fi
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if (( _STC > 0 ))
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then
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_STC=0
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(( ARG_DEBUG > 0 )) && debug "doing pgrep check for mariadbd"
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(( $(pgrep -u root,mysql mariadbd 2>>${HC_STDERR_LOG} | wc -l 2>/dev/null) == 0 )) && _STC=1
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fi
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# evaluate results
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case ${_STC} in
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0)
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_MSG="mysqld/mariadb is running"
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;;
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1)
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_MSG="mysqld/mariadb is not running"
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;;
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*)
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# evaluate results
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case ${_STC} in
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0)
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_MSG="mysqld/mariadb is running"
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;;
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1)
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_MSG="mysqld/mariadb is not running"
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;;
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*)
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_MSG="could not determine status of mysqld/mariadb"
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;;
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esac
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if (( _LOG_HEALTHY > 0 || _STC > 0 ))
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then
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log_hc "$0" ${_STC} "${_MSG}"
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esac
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if (( _LOG_HEALTHY > 0 || _STC > 0 ))
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then
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log_hc "$0" ${_STC} "${_MSG}"
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fi
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fi
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# ---- table states (ISAM)----
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@ -286,9 +308,17 @@ then
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return 1
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fi
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# get all databases from mysqlshow
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(( ARG_DEBUG > 0 && ARG_DEBUG_LEVEL > 0 )) && debug "mysqlshow command: ${_MYSQLSHOW_BIN} ${_MYSQLSHOW_OPTS}"
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_DB_LIST=$(${_MYSQLSHOW_BIN} ${_MYSQLSHOW_OPTS} 2>>${HC_STDERR_LOG} |\
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grep -v -E -e '+--' -e 'Databases' 2>/dev/null | awk '{ print $2}' 2>/dev/null)
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(( ARG_DEBUG > 0 )) && debug "mysqlshow command: ${_MYSQLSHOW_BIN} ${_MYSQLSHOW_OPTS}"
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_DB_LIST=$(${_MYSQLSHOW_BIN} ${_MYSQLSHOW_OPTS} 2>>${HC_STDERR_LOG})
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if (( $? > 0 )) || [[ -z "${_DB_LIST}" ]]
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then
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_MSG="unable to run command for {${_MYSQLSHOW_BIN}}"
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log_hc "$0" 1 "${_MSG}"
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# dump debug info
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(( ARG_DEBUG > 0 && ARG_DEBUG_LEVEL > 0 )) && dump_logs
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return 1
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fi
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_DB_LIST=$(print "${_DB_LIST}" | grep -v -E -e '+--' -e 'Databases' 2>/dev/null | awk '{ print $2}' 2>/dev/null)
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else
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_DB_LIST=$(data_comma2newline "${_CFG_CHECK_DATABASES}")
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fi
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@ -303,11 +333,11 @@ then
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warn "could not execute/parse {mysqlshow} or list of databases to check is empty, skipping table checks"
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return 1
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fi
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(( ARG_DEBUG > 0 && ARG_DEBUG_LEVEL > 0 )) && debug "database list for mysqlcheck: ${_MYSQL_DB_LIST}"
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(( ARG_DEBUG > 0 )) && debug "database list for mysqlcheck: ${_MYSQL_DB_LIST}"
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# run check
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for _MYSQL_DB in ${_MYSQL_DB_LIST}
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do
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(( ARG_DEBUG > 0 && ARG_DEBUG_LEVEL > 0 )) && debug "mysqlcheck command: ${_MYSQLCHECK_BIN} ${_MYSQLCHECK_OPTS} --database ${_MYSQL_DB}"
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(( ARG_DEBUG > 0 )) && debug "mysqlcheck command: ${_MYSQLCHECK_BIN} ${_MYSQLCHECK_OPTS} --database ${_MYSQL_DB}"
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_MYSQLCHECK_OUTPUT=$(${_MYSQLCHECK_BIN} ${_MYSQLCHECK_OPTS} --database ${_MYSQL_DB} 2>>${HC_STDERR_LOG})
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if (( $? > 0 )) || [[ -z "${_MYSQLCHECK_OUTPUT}" ]]
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then
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@ -337,7 +367,7 @@ then
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log_hc "$0" ${_STC} "${_MSG}"
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fi
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else
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(( ARG_DEBUG > 0 && ARG_DEBUG_LEVEL > 0 )) && debug "excluding table: ${_MYSQL_TABLE}"
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(( ARG_DEBUG > 0 )) && debug "excluding table: ${_MYSQL_TABLE}"
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fi
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done
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# add mysqlcheck output to stdout log
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@ -356,9 +386,17 @@ then
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fi
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if (( _DO_MYSQL_STATS > 0 ))
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then
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(( ARG_DEBUG > 0 && ARG_DEBUG_LEVEL > 0 )) && debug "mysql command: ${_MYSQLADMIN_BIN} ${_MYSQLADMIN_OPTS}"
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(( ARG_DEBUG > 0 )) && debug "mysql command: ${_MYSQLADMIN_BIN} ${_MYSQLADMIN_OPTS}"
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print "==== {${_MYSQLADMIN_BIN} <hidden_opts> extended-status} ====" >>${HC_STDOUT_LOG}
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${_MYSQLADMIN_BIN} ${_MYSQLADMIN_OPTS} extended-status >>${HC_STDOUT_LOG} 2>>${HC_STDERR_LOG}
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if (( $? > 0 ))
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then
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_MSG="unable to run command for {${_MYSQLADMIN_BIN}}"
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log_hc "$0" 1 "${_MSG}"
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# dump debug info
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(( ARG_DEBUG > 0 && ARG_DEBUG_LEVEL > 0 )) && dump_logs
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continue
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fi
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fi
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return 0
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