Refactor s6 scripts to the new format (#5135)

* Refator s6 scripts to the new format

* Remove unneeded workaround

* Migrate logging to new s6 format

* Remove more unnecessary s6 variables

* Fix prepare-log and when go2rtc is not present in config

* Restart the whole container if either Frigate or go2rtc fails

* D

* Fix service name in finish

* Fix nginx finish comment

* Restart improvements

* Fix devcontainer

* Fix format

* Update Dockerfile

Co-authored-by: Felipe Santos <felipecassiors@gmail.com>

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

Dockerfile

@@ -192,22 +192,10 @@ RUN ldconfig
 EXPOSE 5000
 EXPOSE 1935
 EXPOSE 8554
-EXPOSE 8555
+EXPOSE 8555/tcp 8555/udp
 
-# Fails if cont-init.d fails
-ENV S6_BEHAVIOUR_IF_STAGE2_FAILS=2
-# Wait indefinitely for cont-init.d to finish before starting services
-ENV S6_CMD_WAIT_FOR_SERVICES=1
-ENV S6_CMD_WAIT_FOR_SERVICES_MAXTIME=0
-# Give services (including Frigate) 30 seconds to stop before killing them
-# But this is not working currently because of:
-# https://github.com/just-containers/s6-overlay/issues/503
-ENV S6_SERVICES_GRACETIME=30000
 # Configure logging to prepend timestamps, log to stdout, keep 0 archives and rotate on 10MB
 ENV S6_LOGGING_SCRIPT="T 1 n0 s10000000 T"
-# TODO: remove after a new version of s6-overlay is released. See:
-# https://github.com/just-containers/s6-overlay/issues/460#issuecomment-1327127006
-ENV S6_SERVICES_READYTIME=50
 
 ENTRYPOINT ["/init"]
 CMD []
@@ -217,7 +205,7 @@ FROM deps AS devcontainer
 
 # Do not start the actual Frigate service on devcontainer as it will be started by VSCode
 # But start a fake service for simulating the logs
-COPY docker/fake_frigate_run /etc/services.d/frigate/run
+COPY docker/fake_frigate_run /etc/s6-overlay/s6-rc.d/frigate/run
 
 # Install Node 16
 RUN apt-get update \

docker/rootfs/etc/s6-overlay/s6-rc.d/frigate-log/consumer-for

@@ -0,0 +1 @@
+frigate

docker/rootfs/etc/s6-overlay/s6-rc.d/frigate-log/pipeline-name

@@ -0,0 +1 @@
+frigate-pipeline

docker/rootfs/etc/s6-overlay/s6-rc.d/frigate-log/type

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

docker/rootfs/etc/s6-overlay/s6-rc.d/frigate/finish

@@ -0,0 +1,30 @@
+#!/command/with-contenv bash
+# shellcheck shell=bash
+# Take down the S6 supervision tree when the service exits
+
+set -o errexit -o nounset -o pipefail
+
+declare exit_code_container
+exit_code_container=$(cat /run/s6-linux-init-container-results/exitcode)
+readonly exit_code_container
+readonly exit_code_service="${1}"
+readonly exit_code_signal="${2}"
+readonly service="Frigate"
+
+echo "Service ${service} exited with code ${exit_code_service} (by signal ${exit_code_signal})" >&2
+
+if [[ "${exit_code_service}" -eq 256 ]]; then
+  if [[ "${exit_code_container}" -eq 0 ]]; then
+    echo $((128 + exit_code_signal)) > /run/s6-linux-init-container-results/exitcode
+  fi
+elif [[ "${exit_code_service}" -ne 0 ]]; then
+  if [[ "${exit_code_container}" -eq 0 ]]; then
+    echo "${exit_code_service}" > /run/s6-linux-init-container-results/exitcode
+  fi
+else
+  # Exit code 0 is expected when Frigate is restarted by the user. In this case,
+  # we create a signal for the go2rtc finish script to tolerate the restart.
+  touch /dev/shm/restarting-frigate
+fi
+
+exec /run/s6/basedir/bin/halt

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

@@ -0,0 +1 @@
+frigate-log

docker/rootfs/etc/s6-overlay/s6-rc.d/frigate/run

@@ -4,6 +4,9 @@
 
 set -o errexit -o nounset -o pipefail
 
+# Tell S6-Overlay not to restart this service
+s6-svc -O .
+
 cd /opt/frigate
 
 # Replace the bash process with the Frigate process, redirecting stderr to stdout

docker/rootfs/etc/s6-overlay/s6-rc.d/frigate/type

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

docker/rootfs/etc/s6-overlay/s6-rc.d/go2rtc-log/consumer-for

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

docker/rootfs/etc/s6-overlay/s6-rc.d/go2rtc-log/pipeline-name

@@ -0,0 +1 @@
+go2rtc-pipeline

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

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

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

@@ -0,0 +1,32 @@
+#!/command/with-contenv bash
+# shellcheck shell=bash
+# Take down the S6 supervision tree when the service exits
+
+set -o errexit -o nounset -o pipefail
+
+declare exit_code_container
+exit_code_container=$(cat /run/s6-linux-init-container-results/exitcode)
+readonly exit_code_container
+readonly exit_code_service="${1}"
+readonly exit_code_signal="${2}"
+readonly service="go2rtc"
+
+echo "Service ${service} exited with code ${exit_code_service} (by signal ${exit_code_signal})" >&2
+
+if [[ "${exit_code_service}" -eq 256 ]]; then
+  if [[ "${exit_code_container}" -eq 0 ]]; then
+    echo $((128 + exit_code_signal)) > /run/s6-linux-init-container-results/exitcode
+  fi
+elif [[ "${exit_code_service}" -ne 0 ]]; then
+  if [[ "${exit_code_container}" -eq 0 ]]; then
+    echo "${exit_code_service}" > /run/s6-linux-init-container-results/exitcode
+  fi
+else
+  # go2rtc is not supposed to exit, so even when it exits with 0 we make the
+  # container with 1. We only tolerate it when Frigate is restarting.
+  if [[ "${exit_code_container}" -eq 0 && ! -f /dev/shm/restarting-frigate ]]; then
+    echo "1" > /run/s6-linux-init-container-results/exitcode
+  fi
+fi
+
+exec /run/s6/basedir/bin/halt

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

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

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

@@ -4,6 +4,9 @@
 
 set -o errexit -o nounset -o pipefail
 
+# Tell S6-Overlay not to restart this service
+s6-svc -O .
+
 raw_config=$(python3 /usr/local/go2rtc/create_config.py)
 
 # Replace the bash process with the go2rtc process, redirecting stderr to stdout

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

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

docker/rootfs/etc/s6-overlay/s6-rc.d/log-prepare/type

@@ -0,0 +1 @@
+oneshot

docker/rootfs/etc/s6-overlay/s6-rc.d/log-prepare/up

@@ -0,0 +1 @@
+/etc/s6-overlay/s6-rc.d/log-prepare/run

docker/rootfs/etc/s6-overlay/s6-rc.d/nginx-log/consumer-for

@@ -0,0 +1 @@
+nginx

docker/rootfs/etc/s6-overlay/s6-rc.d/nginx-log/pipeline-name

@@ -0,0 +1 @@
+nginx-pipeline

docker/rootfs/etc/s6-overlay/s6-rc.d/nginx-log/type

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

docker/rootfs/etc/s6-overlay/s6-rc.d/nginx/finish

@@ -0,0 +1,28 @@
+#!/command/with-contenv bash
+# shellcheck shell=bash
+# Take down the S6 supervision tree when the service fails
+
+set -o errexit -o nounset -o pipefail
+
+declare exit_code_container
+exit_code_container=$(cat /run/s6-linux-init-container-results/exitcode)
+readonly exit_code_container
+readonly exit_code_service="${1}"
+readonly exit_code_signal="${2}"
+readonly service="NGINX"
+
+echo "Service ${service} exited with code ${exit_code_service} (by signal ${exit_code_signal})" >&2
+
+if [[ "${exit_code_service}" -eq 256 ]]; then
+  if [[ "${exit_code_container}" -eq 0 ]]; then
+    echo $((128 + exit_code_signal)) > /run/s6-linux-init-container-results/exitcode
+  fi
+  if [[ "${exit_code_signal}" -eq 15 ]]; then
+    exec /run/s6/basedir/bin/halt
+  fi
+elif [[ "${exit_code_service}" -ne 0 ]]; then
+  if [[ "${exit_code_container}" -eq 0 ]]; then
+    echo "${exit_code_service}" > /run/s6-linux-init-container-results/exitcode
+  fi
+  exec /run/s6/basedir/bin/halt
+fi

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

@@ -0,0 +1 @@
+nginx-log

docker/rootfs/etc/s6-overlay/s6-rc.d/nginx/type

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

docker/rootfs/etc/services.d/frigate/finish

@@ -1,16 +0,0 @@
-#!/command/with-contenv bash
-# shellcheck shell=bash
-# Take down the S6 supervision tree when the service exits
-
-set -o errexit -o nounset -o pipefail
-
-# Prepare exit code
-if [[ "${1}" -eq 256 ]]; then
-  exit_code="$((128 + ${2}))"
-else
-  exit_code="${1}"
-fi
-
-# Make the container exit with the same exit code as the service
-echo "${exit_code}" > /run/s6-linux-init-container-results/exitcode
-exec /run/s6/basedir/bin/halt

docker/rootfs/etc/services.d/go2rtc/finish

@@ -1,8 +0,0 @@
-#!/command/with-contenv bash
-# shellcheck shell=bash
-# Take down the S6 supervision tree when the service fails, or restart it
-# otherwise
-
-if [[ "${1}" -ne 0 && "${1}" -ne 256 ]]; then
-  exec /run/s6/basedir/bin/halt
-fi

docker/rootfs/etc/services.d/nginx/finish

@@ -1,8 +0,0 @@
-#!/command/with-contenv bash
-# shellcheck shell=bash
-# Take down the S6 supervision tree when the service fails, or restart it
-# otherwise
-
-if [[ "${1}" -ne 0 && "${1}" -ne 256 ]]; then
-  exec /run/s6/basedir/bin/halt
-fi

frigate/http.py

@@ -769,7 +769,10 @@ def config_save():
             logging.error(f"Error restarting Frigate: {e}")
             return "Config successfully saved, unable to restart Frigate", 200
 
-        return "Config successfully saved, restarting...", 200
+        return (
+            "Config successfully saved, restarting (this can take up to one minute)...",
+            200,
+        )
     else:
         return "Config successfully saved.", 200
 

frigate/util.py

@@ -628,13 +628,8 @@ def clipped(obj, frame_shape):
 
 
 def restart_frigate():
-    proc = psutil.Process(1)
-    # if this is running via s6, sigterm pid 1
-    if proc.name() == "s6-svscan":
-        proc.terminate()
-    # otherwise, just try and exit frigate
-    else:
-        os.kill(os.getpid(), signal.SIGTERM)
+    # S6 overlay is configured to exit once the Frigate process exits
+    os.kill(os.getpid(), signal.SIGTERM)
 
 
 class EventsPerSecond:

web/src/AppBar.jsx

@@ -78,7 +78,7 @@ export default function AppBar() {
       {showDialogWait ? (
         <Prompt
           title="Restart in progress"
-          text="Please wait a few seconds for the restart to complete before reloading the page."
+          text="This can take up to one minute, please wait before reloading the page."
         />
       ) : null}
     </Fragment>