145 lines
3.7 KiB
Bash
Executable File
145 lines
3.7 KiB
Bash
Executable File
#!/bin/bash
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#
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# NAME
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# status.sh - Checks the status of the nevisIDM Service.
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#
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# SYNOPSIS
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# status.sh
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#
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# DESCRIPTION
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# Performs periodic checks until the service is up or broken or timeout is reached.
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# The script terminates when the process of the service stops running.
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# There are no arguments for this script.
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#
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# EXIT CODES
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# 0 Service is up.
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# 1 Service process is not running.
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# 2 Service is broken.
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# 3 Timeout reached.
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# Defines how much we should sleep between checking if the service is up.
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interval=1
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# Defines how much we should wait the service to start up until we give up and exit.
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timeout=180
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((end_time=${SECONDS}+$timeout))
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# Checks if the process of the service is still running.
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# Arguments:
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# None
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# Returns:
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# In case it is running, returns 0, otherwise non-zero (exit code of systemctl).
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isProcessRunning() {
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systemctl is-active --quiet nevisidm@default
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IS_RUNNING=$?
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return $IS_RUNNING
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}
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# Checks if the readiness (/health) management endpoint can be used for checking status.
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# (nevisIDM introduced the readiness (/health) management endpoint in 2.73.1.15 version.)
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# Arguments:
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# None
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# Returns:
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# If the nevisIDM version is at least 2.73.1.15, returns 0.
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# Otherwise returns 1.
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canHealthCheckUsed() {
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minimal=2.73.1.15
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installed=`readlink -f /opt/nevisidm/bin | awk -F'/' '{print $4}' | sed 's/rc.*//'`
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if [ "$installed" = "`echo -e "$installed\n$minimal" | sort -V | tail -n1`" ]; then
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return 0
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else
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return 1
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fi
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}
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# Checks if the service is up.
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# Based on nevisIDM version uses different nevisIDM endpoints.
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# Arguments:
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# None
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# Returns:
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# The result of ServiceCheck function.
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checkService() {
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if canHealthCheckUsed; then
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doServiceCheckHealth
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return $?
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else
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doServiceCheckOld
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return $?
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fi
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}
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# Checks if the service is up. (Attempts connecting the service with curl.)
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# In case the service is broken, exits with exit code 2.
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# Arguments:
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# None
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# Returns:
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# If the connection was successful and the service up (is not broken), returns 0.
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# If the connection was not successful, returns the curl exit code.
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doServiceCheckOld() {
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HC=`curl --insecure --silent --output /dev/null --write-out "%{http_code}" https://idm:8989/nevisidm/admin/`
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CON=$?
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if [ "$CON" -ne 0 ]; then
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EXIT_CODE=$CON
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elif [ $HC -ge 500 ]; then
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echo "Service is broken (HTTP code $HC)."
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exit 2
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else
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EXIT_CODE=0
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fi
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return $EXIT_CODE
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}
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# Checks if the service is up. (Attempts connecting the service with curl.)
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# Note: With the health check endpoint there is no way fail early when the endpoint returns HTTP 503, because it can come up
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# later and then return HTTP 200.
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# Arguments:
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# None
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# Returns:
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# If the connection was successful and the service up (is not broken), returns 0.
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# If the connection was not successful, returns 1.
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doServiceCheckHealth() {
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HC=`curl --silent --output /dev/null --write-out "%{http_code}" http://0.0.0.0:8998/health`
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CON=$?
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if [ $HC -eq 200 ]; then
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EXIT_CODE=0
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else
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EXIT_CODE=1
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fi
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return $EXIT_CODE
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}
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# This function encapsulates the logic of checking if the process is running and if the service is up.
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# In case the process is not running, exits with exit code 1.
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# Arguments:
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# None
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# Returns:
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# If the service process is running, returns the result of the service check function.
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check() {
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if isProcessRunning
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then
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checkService
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CS=$?
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return $CS
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else
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echo "Process is not running."
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exit 1
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fi
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}
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# Check the status of the service periodically.
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while ((${SECONDS} < ${end_time}))
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do
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sleep ${interval}
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if check
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then
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echo "Service is up."
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exit 0
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fi
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done
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echo "Exceeded check timeout (${timeout}s). Service is down."
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exit 3 |