diff --git a/cluster/apt.apply.update.sh b/cluster/apt.apply.update.sh new file mode 100755 index 0000000..c6f5f6a --- /dev/null +++ b/cluster/apt.apply.update.sh @@ -0,0 +1,234 @@ +#!/bin/sh + +# This script will try to apply APT upgrades if all conditions are satisfied +# 1. SGE queue is disable +# 2. No SGE jobs are running +# 3. No process related to Maco are running + +# This script can be call by a cronjob (eg. hourly) + +# Vars {{{ +readonly PROGNAME=$(basename "${0}") +readonly PROGDIR=$(readlink -m $(dirname "${0}")) +readonly ARGS="${*}" +readonly NBARGS="${#}" +[ -z "${DEBUG}" ] && readonly DEBUG=0 +## Export DEBUG for sub-script +export DEBUG + +## Colors +readonly PURPLE='\033[1;35m' +readonly RED='\033[0;31m' +readonly RESET='\033[0m' +readonly COLOR_DEBUG="${PURPLE}" +# }}} + +manage_args() { # {{{ + + case "${NBARGS}" in + 0 ) ## Nothing to do + ;; + * ) + printf '%b\n' "${RED}Don't expect any arguments.${RESET}" + printf '%b\n' "---" + usage + exit 1 + ;; + esac + +} +# }}} +usage() { # {{{ + + cat <<- EOF +usage: $PROGNAME + +Apply any APT package upgrade if the host is free : + * SGE queue is disable + * No SGE jobs are running + +EXAMPLES : + - Apply upgrade on the current host + ${PROGNAME} + EOF + +} +# }}} +debug_message() { # {{{ + + local_message="${1}" + + ## Print message if DEBUG is enable (=0) + [ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' "DEBUG − ${PROGNAME} : ${local_message}" + +} +# }}} +is_apt_upgrade_absent() { # {{{ + + ## Count the number of upgradable packages and substract 1 for the header + #local_apt_upgrade_number="$(apt list --upgradable \ + #| wc -l \ + #| awk '{print $1-1}')" + local_apt_upgrade_number="5" + + case "${local_apt_upgrade_number}" in + 0 ) ## No available upgrade + return_apt_upgrade_absent="0" + ;; + * ) ## Upgrade seems available + return_apt_upgrade_absent="1" + ;; +esac + + ## Simple debug message to valid current variable + debug_message "is_apt_upgrade_absent − \ +APT upgrade available for this system: ${RED}${local_apt_upgrade_number:=/dev/null}${COLOR_DEBUG}." + + return "${return_apt_upgrade_absent}" + +} +# }}} +is_apt_upgrade_present() { # {{{ + + ## Count the number of upgradable packages and substract 1 for the header + local_apt_upgrade_number="$(apt list --upgradable \ + | wc -l \ + | awk '{print $1-1}')" + + case "${local_apt_upgrade_number}" in + 0 ) ## No available upgrade + return_apt_upgrade_present="1" + ;; + * ) ## Upgrade seems available + return_apt_upgrade_present="0" + ;; +esac + + ## Simple debug message to valid current variable + debug_message "is_apt_upgrade_present − \ +APT upgrade available for this system: ${RED}${local_apt_upgrade_number:=/dev/null}${COLOR_DEBUG}." + + return "${return_apt_upgrade_present}" + +} +# }}} +is_queue_enable() { # {{{ + + local_sge_hostname="${1}" + local_sge_queue_name="${2}" + ## List all queues with 'disable' state and filter to the expected queue name + ## with a fake_user to avoid pending jobs for this queue + ### And count returned lines + local_sge_queue_test=$(qstat -f -qs d -q "${local_sge_queue_name:=/dev/null}@${local_sge_hostname:=/dev/null}" -u fake_user \ + | wc -l) + + case "${local_sge_queue_test}" in + 0 ) ## No result so the queue is enable + local_sge_queue_state="enable" + return_queue_enable="0" + ;; + 3 ) ## Results (header + queue name) so the queue is disable + local_sge_queue_state="disable" + return_queue_enable="1" + ;; + * ) ## Unexpected result + printf '%b\n' "${RED}Not able to determine the state of ${local_sge_queue_name:=/dev/null}@${local_sge_hostname:=/dev/null} queue (command return ${local_sge_queue_test} lines).${RESET}" + exit 2 + ;; +esac + + ## Simple debug message to valid current variables + debug_message "is_queue_enable − \ +SGE queue: ${RED}${local_sge_queue_name:=/dev/null}${COLOR_DEBUG} \ +state is: ${RED}${local_sge_queue_state:=/dev/null}${COLOR_DEBUG}." + + return "${return_queue_enable}" + +} +# }}} +is_job_running() { # {{{ + + local_sge_hostname="${1}" + ## List SGE informations about the host + ### And get the number of used slots + local_sge_slots_used=$(qhost -h "${local_sge_hostname:=/dev/null}" -q -xml \ + | grep slots_used \ + | sed 's;.*\(.*\);\1;') + + case "${local_sge_slots_used}" in + 0 ) ## No jobs are running + return_job_running="1" + ;; + * ) ## Results (header + queue name) so the queue is disable + return_job_running="0" + ;; +esac + + ## Simple debug message to valid current variables + debug_message "is_job_running − \ +jobs running on ${local_sge_hostname} host : ${RED}${local_sge_slots_used}${COLOR_DEBUG}." + + return "${return_job_running}" + +} +# }}} +is_proc_running() { # {{{ + + local_proc_pattern="${1}" + + local_count_proc_pattern="$(pgrep -f -- "${local_proc_pattern}" | wc -l)" + + case "${local_count_proc_pattern}" in + 0 ) ## No procs related to this pattern are running + return_proc_running="1" + ;; + * ) ## At least one proc seems running + return_proc_running="0" + ;; +esac + + ## Simple debug message to valid current variables + debug_message "is_proc_running − \ +${local_count_proc_pattern} procs seems running according to the pattern: ${RED}${local_proc_pattern}${COLOR_DEBUG}." + + return "${return_proc_running}" + +} +# }}} +main() { # {{{ + + manage_args "${ARGS}" + + sge_hostname="$(hostname -f)" + sge_queue_name="$(qhost -h "${sge_hostname:=/dev/null}" -q -xml \ + | grep "queue name" \ + | cut -d"'" -f2 )" + + maco_proc_pattern="(/opt/maco/bin/maco.autoupdate.sh)" + + ## If NO APT package upgrade is available + ### Exit + is_apt_upgrade_absent \ + && exit 0 + + ## If SGE queue is enable + ### Exit + is_queue_enable "${sge_hostname}" "${sge_queue_name}" \ + && exit 0 + + ## If any SGE job runs + ### Exit + is_job_running "${sge_hostname}" \ + && exit 0 + + ## If anything to maco is currently running + ### Exit + is_proc_running "${maco_proc_pattern}" \ + && exit 0 + +} +# }}} + +main + +exit 0