Json logs

.circleci/config.yml

@@ -159,6 +159,7 @@ executors:
           SHARED_BUFFERS_SIZE: "1GB"
           EFFECTIVE_CACHE_SIZE: "1GB"
           STATS_TARGET: 100
+          FLOWDB_LOG_DEST: stderr
       - image: bitnami/redis:latest
         environment:
           REDIS_PASSWORD: "fm_redis"

CHANGELOG.md

@@ -11,6 +11,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Changed
 - FlowDB now triggers an ANALYZE on newly created cache tables to generate statistics rather than waiting for autovacuum
+- FlowDB now produces JSON formatted logs by default. Set `FLOWDB_LOG_DEST=csvlog` for the old default behaviour.
+- The logging destination of FlowDB can now be configured at init by setting the `FLOWDB_LOG_DEST` environment variable, valid options are `stderr`, `csvlog`, and `jsonlog`.
+
 
 ### Fixed
 

docs/source/administrator/deployment.md

@@ -29,18 +29,19 @@ FlowDB is distributed as a docker container. To run it, you will need to provide
 
 You may also provide the following environment variables:
 
-| Variable name                     | Purpose | Default value |
-|-----------------------------------| ------- | ------------- |
-| CACHE_SIZE                        | Maximum size of the cache schema | 1 tenth of available space in pgdata directory |
-| CACHE_PROTECTED_PERIOD            | Amount of time to protect cache tables from being cleaned up | 86400 (24 hours) |
-| CACHE_HALF_LIFE                   | Speed at which cache tables expire when not used | 1000 |
-| MAX_CPUS                          | Maximum number of CPUs that may be used for parallelising queries | The greater of 1 or 1 less than all CPUs |
-| SHARED_BUFFERS_SIZE               | Size of shared buffers | 16GB |
-| MAX_WORKERS                       |  Maximum number of CPUs that may be used for parallelising one query | MAX_CPUS/2 |
-| MAX_WORKERS_PER_GATHER            |  Maximum number of CPUs that may be used for parallelising part of one query | MAX_CPUS/2 |
-| EFFECTIVE_CACHE_SIZE              | Postgres cache size | 25% of total RAM |
-| FLOWDB_ENABLE_POSTGRES_DEBUG_MODE | When set to TRUE, enables use of the [pgadmin debugger](https://www.pgadmin.org/docs/pgadmin4/4.13/debugger.html) | FALSE |
- | MAX_LOCKS_PER_TRANSACTION         | Controls the maximum number of locks one transaction can take, you may wish to reduce this on low-memory servers. | 36500 | 
+| Variable name                     | Purpose                                                                                                           | Default value                                  |
+|-----------------------------------|-------------------------------------------------------------------------------------------------------------------|------------------------------------------------|
+| CACHE_SIZE                        | Maximum size of the cache schema                                                                                  | 1 tenth of available space in pgdata directory |
+| CACHE_PROTECTED_PERIOD            | Amount of time to protect cache tables from being cleaned up                                                      | 86400 (24 hours)                               |
+| CACHE_HALF_LIFE                   | Speed at which cache tables expire when not used                                                                  | 1000                                           |
+| MAX_CPUS                          | Maximum number of CPUs that may be used for parallelising queries                                                 | The greater of 1 or 1 less than all CPUs       |
+| SHARED_BUFFERS_SIZE               | Size of shared buffers                                                                                            | 16GB                                           |
+| MAX_WORKERS                       | Maximum number of CPUs that may be used for parallelising one query                                               | MAX_CPUS/2                                     |
+| MAX_WORKERS_PER_GATHER            | Maximum number of CPUs that may be used for parallelising part of one query                                       | MAX_CPUS/2                                     |
+| EFFECTIVE_CACHE_SIZE              | Postgres cache size                                                                                               | 25% of total RAM                               |
+| FLOWDB_ENABLE_POSTGRES_DEBUG_MODE | When set to TRUE, enables use of the [pgadmin debugger](https://www.pgadmin.org/docs/pgadmin4/4.13/debugger.html) | FALSE                                          |
+| MAX_LOCKS_PER_TRANSACTION         | Controls the maximum number of locks one transaction can take, you may wish to reduce this on low-memory servers. | 36500                                          | 
+| FLOWDB_LOG_DEST                   | Controls the logging destination, may be be one of `stderr`, `jsonlog`, `csvlog`.                                  | `jsonlog`                                       |
 
 However in most cases, the defaults will be adequate.
 

flowdb.Dockerfile

@@ -139,6 +139,9 @@ ENV FLOWAPI_FLOWDB_USER=flowapi
 # Default location table
 ENV LOCATION_TABLE=infrastructure.cells
 
+# Default logging destination
+ENV FLOWDB_LOG_DEST=jsonlog
+
 #
 #  Copy file spinup build scripts to be execed.
 #

flowdb/bin/build/configurate.py

@@ -80,6 +80,13 @@ def bool_env(var):
 if bool_env("FLOWDB_ENABLE_POSTGRES_DEBUG_MODE"):
     preload_libraries.append("plugin_debugger")
 
+possible_log_destinations = ["stderr", "jsonlog", "csvlog"]
+log_destination = os.getenv("FLOWDB_LOG_DEST", "jsonlog").lower()
+if log_destination not in possible_log_destinations:
+    raise ValueError(
+        f"Invalid log destination. Valid values for FLOWDB_LOG_DEST are {possible_log_destinations}"
+    )
+
 with open("/docker-entrypoint-initdb.d/pg_config_template.conf") as fin:
     config_file = fin.read().format(
         cores=cores,
@@ -92,6 +99,8 @@ def bool_env(var):
         stats_target=stats_target,
         use_jit=use_jit,
         max_locks=max_locks,
+        log_destination=log_destination,
+        collecter_on="on" if log_destination != "stderr" else "off",
     )
 
 print("Writing config file to", config_path)

flowdb/bin/build/pg_config_template.conf

@@ -20,9 +20,9 @@
 #
 # Logging options
 #
-log_destination = 'csvlog'
+log_destination = '{log_destination}'
 log_directory = 'pg_log'
-logging_collector = 'on'
+logging_collector = '{collecter_on}'
 log_filename = 'postgres-%Y-%m-%d_%H%M%S'
 log_rotation_age = 1d
 log_rotation_size = 1GB