Add healthcheck for go2rtc service (#5545)

* Upgrade s6-overlay from 3.1.3.0 to 3.1.4.0

* Add go2rtc healthcheck service

Also don't make go2rtc exits cause the container to fail.

* Reword healthcheck message

Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>

* Add timeout to go2rtc healthcheck

* Update healthcheck message

Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>

* Give additional time for go2rtc start/restart

* Fix typo

* Avoid creating go2rtc config multiple times

* Fix healthcheck not starting

* Fix sleep

* Fix more hidden logs

* Decrease time window and use curl's timeout flag

---------

Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>

docker/rootfs/etc/s6-overlay/s6-rc.d/go2rtc-healthcheck/finish

@@ -0,0 +1,12 @@
+#!/command/with-contenv bash
+# shellcheck shell=bash
+
+set -o errexit -o nounset -o pipefail
+
+# Logs should be sent to stdout so that s6 can collect them
+
+readonly exit_code_service="${1}"
+readonly exit_code_signal="${2}"
+readonly service="go2rtc-healthcheck"
+
+echo "[INFO] The ${service} service exited with code ${exit_code_service} (by signal ${exit_code_signal})"

docker/rootfs/etc/s6-overlay/s6-rc.d/go2rtc-healthcheck/producer-for

@@ -0,0 +1 @@
+go2rtc-log

docker/rootfs/etc/s6-overlay/s6-rc.d/go2rtc-healthcheck/run

@@ -0,0 +1,22 @@
+#!/command/with-contenv bash
+# shellcheck shell=bash
+# Start the go2rtc-healthcheck service
+
+set -o errexit -o nounset -o pipefail
+
+# Logs should be sent to stdout so that s6 can collect them
+
+# Give some additional time for go2rtc to start before start pinging
+sleep 10s
+echo "[INFO] Starting go2rtc healthcheck service..."
+
+while sleep 30s; do
+    # Check if the service is running
+    if ! curl --connect-timeout 10 --fail --silent --show-error --output /dev/null http://127.0.0.1:1984/api/streams 2>&1; then
+        echo "[ERROR] The go2rtc service is not responding to ping, restarting..."
+        # We can also use -r instead of -t to send kill signal rather than term
+        s6-svc -t /var/run/service/go2rtc 2>&1
+        # Give some additional time to go2rtc to restart before start pinging again
+        sleep 10s
+    fi
+done

docker/rootfs/etc/s6-overlay/s6-rc.d/go2rtc-healthcheck/timeout-kill

@@ -0,0 +1 @@
+5000

docker/rootfs/etc/s6-overlay/s6-rc.d/go2rtc-healthcheck/type

@@ -0,0 +1 @@
+longrun