Merge pull request #34 from guardian/ash/InitContainer

Use aws-for-fluent-bit `init` image and add ECS Metadata

ecs/Dockerfile

@@ -1,3 +1,16 @@
-FROM amazon/aws-for-fluent-bit:latest
-ADD parsers.conf /parsers.conf
-ADD custom.conf /custom.conf
+FROM amazon/aws-for-fluent-bit:init-2.32.0
+
+# Environment variables are used to specify which config files to load
+# https://github.com/aws/aws-for-fluent-bit/blob/mainline/use_cases/init-process-for-fluent-bit/README.md#how-to-use-multi-config-feature
+
+ENV aws_fluent_bit_init_file_1 /guardian-parsers.conf
+
+# Added by aws-for-fluent-bit base image
+# https://github.com/aws/aws-for-fluent-bit/blob/develop/scripts/dockerfiles/Dockerfile.main-release#L49
+ENV aws_fluent_bit_init_file_2 /ecs/ecs-metadata.conf
+
+# This config file must go last as it applies a `parser` filter which will interfere with any filters that are run before it (config files loaded in reverse order)
+ENV aws_fluent_bit_init_file_3 /guardian.conf
+
+ADD guardian-parsers.conf /guardian-parsers.conf
+ADD guardian.conf /guardian.conf

ecs/custom.conf → ecs/guardian.conf

@@ -1,6 +1,3 @@
-[SERVICE]
-    Parsers_File /parsers.conf
-
 [FILTER]
     Name modify
     Match *