Add example filebeat-container-logger.sh script

Author: wjoel

examples/filebeat-container-logger.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+# This creates a config file for Filebeat in the sandbox directory
+# and starts Filebeat, reading from standard input.
+
+# We use the logstash output by default, which Graylog supports
+# through the Beats input.
+OUTPUT_HOSTS='["your.graylog.example.com:5044"]'
+
+config_path="$MESOS_LOG_SANDBOX_DIRECTORY/filebeat-$MESOS_LOG_STREAM.yml"
+
+mesos_fields=$(echo "$MESOS_EXECUTORINFO_JSON" | \
+                jq -r ".command.environment.variables
+                         |map(\"\(.name):\(.value|tostring)\")|.[]" | \
+                # Skip empty variables, use mesos_ prefix, convert to lowercase
+                awk -F: 'length($2) > 0 {
+                           $1=tolower($1);
+                           if (!match($1, "^mesos_.*")) {
+                             $1="mesos_" $1;
+                           }
+                           printf("%s: \"%s\"\n        ", $1, $2);
+                         }')
+
+cat <<EOF > $config_path
+filebeat:
+  prospectors:
+    -
+      paths:
+        - "-"
+      input_type: stdin
+      close_eof: true
+      fields:
+        mesos_log_stream: $MESOS_LOG_STREAM
+        mesos_log_sandbox_directory: $MESOS_LOG_SANDBOX_DIRECTORY
+        $mesos_fields
+
+output:
+  logstash:
+    hosts: $OUTPUT_HOSTS
+EOF
+
+/usr/bin/filebeat -c $config_path