Merge pull request #1 from PaesslerAG/fix/entrypoint_service_run

Adapt entrypoint and README

Dockerfile

@@ -57,4 +57,5 @@ VOLUME [ "/config", "/opt/paessler/share/scripts" ]
 # set WORKDIR to a sane default
 WORKDIR /
 
-ENTRYPOINT [ "/run-prtgmpprobe.sh", "service-run" ]
+ENTRYPOINT [ "/run-prtgmpprobe.sh" ]
+CMD [ "service-run" ]

README.md

@@ -66,12 +66,26 @@ nats:
 ```
 
 You must put the configuration file into the `/config/config.yml` volume of the docker container.
+For all available configuration options, see [config.full-example.yml](./config/config.full-example.yml).
 
-ℹ️ The  container also used the `/config` volume to store the [multi-platform probe's GID][GID] and therefore cannot be set as read-only (`:ro`) unless you specify the GID as an environment variable.
+ℹ️ If necessary you can put your custom [CA certificate][TLS] into `/config/certs` and specify it in the `/config/config.yml` as well:
+
+```yaml
+access_key: YOUR_PROBE_ACCESS_KEY
+nats:
+  url: tls://localhost:23561
+  authentication:
+    user: USER
+    password: PASSWORD
+  server_ca: /config/certs/ca.crt
+```
+
+ℹ️ The container also used the `/config` volume to store the [multi-platform probe's GID][GID] and therefore cannot be set as read-only (`:ro`) unless you specify the [multi-platform probe's GID][GID] as an environment variable.
 
 You can also use the `/opt/paessler/share/scripts` volume for the scripts of the [Script v2][prtgmanual:scriptv2] sensor.
 
 [prtgmanual:scriptv2]: https://www.paessler.com/manuals/prtg/script_v2_sensor
+[TLS]: https://kb.paessler.com/en/topic/91877-how-can-i-create-a-tls-certificate
 [GID]: https://www.paessler.com/manuals/prtg/prtg_administration_tool_on_remote_probe_systems#:~:text=GID
 
 ```sh

run-prtgmpprobe.sh

@@ -18,7 +18,7 @@ do
         ;;
     esac
 done
-if [ ! $_passthrough -eq 0 ] ; then
+if [ $_passthrough -neq 0 ] ; then
     exec gosu paessler_mpprobe:paessler_mpprobe \
         ${PRTGMPPROBE__BINARY} \
         "$@"
@@ -42,19 +42,29 @@ done
 
 # Handling Env vars
 
-# Get/Generate a probe id from PRTGMPPROBE__ID_FILE or from PRTGMPPROBE__ID
-if [ -z "${PRTGMPPROBE__ID-}" ] ; then
-    if [ ! -f "${PRTGMPPROBE__ID_FILE}" ] ; then
-        cat /proc/sys/kernel/random/uuid > ${PRTGMPPROBE__ID_FILE} || (
-            error "Unable to write to ${PRTGMPPROBE__ID_FILE}. Please either set PRTGMPPROBE__ID in the container environment or make sure the location ${PRTGMPPROBE__ID_FILE} is writable."
-            echo >&2 " "
-            echo >&2 "Example:"
-            echo >&2 "PRTGMPPROBE__ID=$(cat /proc/sys/kernel/random/uuid)"
-            exit 1
-        )
+if [ ! -f "${PRTGMPPROBE__CONFIG_FILE}" ] ; then
+    error "Configuration file ${PRTGMPPROBE__CONFIG_FILE} does not exist. Please create one."
+    echo >&2 " "
+    echo >&2 "Example:"
+    ${PRTGMPPROBE__BINARY} example-config >&2
+    exit 1
+fi
+
+# Get/Generate a probe id from PRTGMPPROBE__ID_FILE or from PRTGMPPROBE__ID if not set in PRTGMPPROBE__CONFIG_FILE
+if [ ! grep -q "^id:" "${PRTGMPPROBE__CONFIG_FILE}" ] ; then
+    if [ -z "${PRTGMPPROBE__ID-}" ] ; then
+        if [ ! -f "${PRTGMPPROBE__ID_FILE}" ] ; then
+            cat /proc/sys/kernel/random/uuid > ${PRTGMPPROBE__ID_FILE} || (
+                error "Unable to write to ${PRTGMPPROBE__ID_FILE}. Please either set PRTGMPPROBE__ID in the container environment, 'id:' in the ${PRTGMPPROBE__CONFIG_FILE} or make sure the location ${PRTGMPPROBE__ID_FILE} is writable."
+                echo >&2 " "
+                echo >&2 "Example:"
+                echo >&2 "PRTGMPPROBE__ID=$(cat /proc/sys/kernel/random/uuid)"
+                exit 1
+            )
+        fi
+        PRTGMPPROBE__ID=$(cat ${PRTGMPPROBE__ID_FILE})
+        export PRTGMPPROBE__ID
     fi
-    PRTGMPPROBE__ID=$(cat ${PRTGMPPROBE__ID_FILE})
-    export PRTGMPPROBE__ID
 fi
 
 export PRTGMPPROBE__NAME=${PRTGMPPROBE__NAME:-"multi-platform-probe@$(hostname)"}
@@ -70,14 +80,6 @@ export PRTGMPPROBE__LOGGING__CONSOLE__WITHOUT_TIME=${PRTGMPPROBE__LOGGING__CONSO
 export PRTGMPPROBE__LOGGING__JOURNALD__LEVEL=${PRTGMPPROBE__LOGGING__JOURNALD__FIELD_PREFIX:-"off"}
 export PRTGMPPROBE__LOGGING__JOURNALD__FIELD_PREFIX=${PRTGMPPROBE__LOGGING__JOURNALD__FIELD_PREFIX:-"PRTGMPPROBE"}
 
-if [ ! -f "${PRTGMPPROBE__CONFIG_FILE}" ] ; then
-    error "Configuration file ${PRTGMPPROBE__CONFIG_FILE} does not exist. Please create one."
-    echo >&2 " "
-    echo >&2 "Example:"
-    ${PRTGMPPROBE__BINARY} example-config >&2
-    exit 1
-fi
-
 env | grep PRTGMPPROBE__ >&2
 
 # add capabilities for icmp to the probe executable