Outcold Solutions LLC

Monitoring Docker - Release History

5.16.363 - 2021-05-26

Collectord updates:

  • Upgrade go runtime to 1.16.3
  • Bug fix: fix verbose logging for docker watcher with messages "failed to get next event"
  • Bug fix: Verify command fails on Containerd runtime
  • Bug fix: DefaultIdleConnTimeout is ignored for HTTP clients

5.16.361 - 2021-03-16

Requires collectorfordocker version 5.16.350 or above

  • Bug fix: use correct units for Memory and Storage (MiB, MB, Mb)
  • Bug fix: Collectord metrics request time shows the summary on the period, not the individual request times

Collectord updates:

  • ARM64 image
  • Upgrade to Go 1.16.2
  • Bug fix: precise time to Splunk HEC, sending with milliseconds instead of nanoseconds (which are incorrectly ronded by HEC)
  • Bug fix: first sample of the container can record above 100% of the CPU usage, as the values are pretty low
  • Bug fix: verify command does not respect glob patterns for Prometheus inputs (certs, tokens)
  • Bug fix: trim spaces in token value for Prometheus inputs

5.16.353 - 2021-02-11

Collectord updates:

  • Bug fix: collectord can report parse int errors on the stderr
  • Upgrade go runtime to 1.15.8

5.16.351 - 2021-01-04

Collectord updates:

  • Bug fix: host file inputs can raise a fatal error: concurrent map writes

5.16.350 - 2020-12-14

Requires collectorfordocker version 5.16.350 or above

  • New dashboard: Collectord metrics

Collectord updates:

  • Annotations for collecting prometheus metrics: authorization keys and CAName for SSL certificates
  • Improvement for DNS resolutions of Splunk output FQDN
  • Export internal collectord metrics in Prometheus format
  • Forwarding internal collectord metrics to Splunk
  • For the watch objects inputs being able to hide management fields
  • In the diag include all open file descriptors
  • Upgrade go runtime to 1.14.13
  • Remove \0 symbol from the labels values in the prometheus metrics
  • Allow to filter host logs with blacklist and whitelist
  • Bug fix: less verbose warnings about not being able to load resources from API server
  • Bug fix: performance improvements for Ack DB
  • Bug fix: custom prometheus metrics forwarded by Collectord do not include cluster field or custom user fields
  • Bug fix: addon pod terminates faster
  • Bug fix: verify command trying to post to all outputs with all indexes specified in the configuration
  • Bug fix: crash in AckDB
  • Bug fix: input system stats does not recognize ouputs specified for the host and cgroup
  • Bug fix: verify command runs recursively all the time for host logs even when recursively is set to false

5.15.305 - 2021-01-04

Collectord updates:

  • Upgrade go runtime to 1.14.13
  • Bug fix: host file inputs can raise a fatal error: concurrent map writes

5.15.304 - 2020-09-30

Collectord updates:

  • Bug fix: cannot disable forwarding of the api resources

5.15.303 - 2020-08-12

Collectord updates:

  • Upgrade golang to 1.14.7 to fix the hang in runtime

5.15.301 - 2020-06-24

Collectord updates:

  • Bug fix: verify command broken for addon pod

5.15.300 - 2020-06-01

Requires collectorforkubernetes version 5.15.300 or above

Collectord updates:

  • Support for annotations to add custom user fields to data
  • Support for blacklisting and whitelisting Prometheus metrics (significally reducing the indexing cost of data)
  • Verify command improvements - verify proper configurations for cgroup (memory/memory.use_hierarchy is 1)
  • Bug fix: fix bug in prometheus metrics parser, empty fields can be filled with previous fields
  • Bug fix: occasionally addon can report warnings about trying to delete expired keys from ack db
  • Bug fix: better handle of connections to metrics endpoints exported in Prometheus format
  • Bug fix: http connections improvements for when Splunk is unresponsive
  • Bug fix: broken diag

5.14.285 - 2020-08-12

Collectord updates:

  • Upgrade golang to 1.14.7 to fix the hang in runtime

5.14.284 - 2020-03-23

Collectord updates:

  • New annotation to configure whitelist pattern for log messages
  • Allow to override Kubernetes service URL
  • Bug fix: panic in output for addon
  • Bug fix: performance and memory usage improvement for ack db

5.14.280 - 2020-01-27

Requires collectorforkubernetes version 5.14.280 or above

  • Logs dashboard: filters depend on selection

Collectord updates:

  • Support templates in the index, source and sourcetype
  • Allow to exclude indexed fields when forwarding to Splunk
  • Support annotation for stats interval for containers
  • Bug fix: verify command can show incorrect error about verifying journald input
  • Bug fix: index on namespace should set index for application logs

5.12.273 - 2019-12-16

Requires collectorfordocker version 5.12.272 or above

  • Bug fix: Swarm Services dashboard compatibility with the new format of metrics

5.12.272 - 2019-11-08

Collectord updates:

  • Bug fix: in case when the rotated files are reusing FileID/DevID Collectord stops forwarding rotated files

5.12.271 - 2019-11-07

Requires collectorfordocker version 5.12.271 or above

  • Improvements for the macros for backward compatibility
  • Bug fix: Swarm Services dashboard could not filter based on the stack name

Collectord updates:

  • Bug fix: when event pattern is used for joining multi-line events, the error can not be showed if raised by the input in pipeline.
  • Bug fix: reduce warnings failed to get the new event in pipeline - submitted
  • Stability improvements

5.12.270 - 2019-10-22

Requires collectorfordocker version 5.12.27- or above

  • Compact metrics (pre-calculated on Collectord side)
  • Switched stats for host and cgroup in different macros
  • Containers count for hosts on Hosts and Host dashboards
  • Improve performance of the search in Docker Services and ECS Services dashboards
  • Use base macro for alerts
  • Add cluster name in the alert results

Collectord updates:

  • Describe command to see applied annotations for containers
  • Bug fix: panic when pipe join configuration is removed
  • Bug fix: panic when proc stats is enabled and cgroup stats is disabled
  • Bug fix: support ProxyBasicAuthorization for license server checks
  • Bug fix: Fix for collecting first sample (can show high CPU usage for first sample)
  • Beta: dynamic index, source and sourcetype names based on the metafields
  • Beta: cluster diagnostics with one rule: node entropy

5.11.266 - 2020-10-15

Collectord updates:

  • Upgrade golang to 1.14.10 to fix the hang in runtime

5.11.265 - 2020-06-24

Collectord updates:

  • Bug fix: memory improvement for large ackdb files

5.11.264 - 2019-11-08

Collectord updates:

  • Bug fix: in case when the rotated files are reusing FileID/DevID Collectord stops forwarding rotated files

5.11.261 - 2019-09-13

Collectord update:

  • Bug fix: improves logging for the directory walker

5.11.260 - 2019-09-09

Requires collectorfordocker version 5.11.260 or above

  • Bug fix: changing source type does not allow to use Swarm and ECS services dashboards
  • Bug fix: improving usability of Swarm and ECS services dashboards for large deployments

Collectord updates:

  • Bug fix: duplicate events then pipeline is getting throttled
  • Bug fix: don't use throttling for devnull output
  • Bug fix: better recovery for ack db corruption
  • Bug fix: crash on journald input initialization when ack db is corrupted
  • Bug fix: annotations joinmultiline requires joinpartial
  • Bug fix: configurations for stdout only with annotations can crash collectord
  • Set events = 50 by default for Splunk output batches

5.10.255 - 2019-11-20

Collectord updates:

  • Bug fix: better recovery for ack db corruption
  • Bug fix: crash on journald input initialization when ack db is corrupted

5.10.253 - 2019-07-31

Collectord update:

  • Bug fix: collectord can pick up compressed json logs (*.gz)
  • Bug fix: too verbose warnings from the docker watcher about retries

5.10.252 - 2019-07-24

Collectord update:

  • Support for configuring the thruput (general and with annotations for container logs)
  • Support for configuring too old or too new events (general and with annotations for container logs)

5.10.251 - 2019-06-20

Collectord update:

  • Ability to configure Acknowledgement database for collectord.

5.10.250 - 2019-06-18

Requires collectorforopenshift version 5.10.250 or above

  • Cluster field filters
  • Base macro for overriding macros for other macros

Collectord updates:

  • Support for volatile and persistent journald storage with default configuration
  • Updated YAML configuration to include most common resources
  • Better support for overriding sourcetype, that does not require to update the Splunk macros
  • Bug fix: rarely when collectord fails to post to HEC it can panic
  • Bug fix: better support for OpenShift 4.x and CRI-O storage
  • Bug fix: space characters in index annotations can break the pipeline

5.9.240 - 2019-05-14

Requires collectorfordocker version 5.9.240 or above

  • Visual improvements on the graphs for the number of logs and events

Collectord updates:

  • Support for multiple Splunk destinations (outputs)
  • Support subdomains for annotations (to deploy multiple collectord instances)
  • Bug fix: journald input keeps fd open to the rotated files
  • Bug fix: fix in the annotation parser for the interval annotations
  • Bug fix: fix splunk url selection configuration for multiple splunk URLs

5.8.231 - 2019-04-25

  • Bug fix: Collectord usage report shows trial licenses for all instances

5.8.230 - 2019-04-22

Requires collectorfordocker version 5.8.230 or above

  • Bug fix: Swarm dashboard does not render containers, when namespace field is not available.
  • Use multiselect filters for most dashboards and filters with possibility to input custom filters.
  • Reduce dedup usage to improve performance on dashboards.

Collectord updates:

  • Bug fix: clogging collectord output with errors when incorrect index is used.
  • Bug fix: short lived containers can results in duplicating logs.
  • Bug fix: clogging collectord output with warnings when kernel reports incorrect VmRss size.
  • Bug fix: annotations cannot override timestamp location for fields extraction.
  • Bug fix: verify command reports Journald input in incorrect place.
  • Better support for cgroup symlinks, automatically discover correct location.

5.7.220 - 2019-03-18

Requires collectorfordocker version 5.7.220 or above

  • Review savedsearches/alerts to support indexing delay (start searches from 2 minutes behind) and run them in more random time.
  • Fixed single value memory panel on host dashboard (missed span)
  • Use SEGMENTATION=none for stats events to use less disk space (needs to me moved to indexers)

Collectord updates:

  • Support hostname formatting with environment variables in configuration
  • New rotated file logic uses less file descriptors and frees rotated files quicker
  • Allow to specify a default sampling value for container logs
  • Reimplemented shutdown sequence to stop collectord faster
  • Allow to override sampling percent with annotations
  • New Input: journald

5.6.213 - 2019-03-03

  • Collectord: Fix panic, when collectord does not have access to docker socket, and information about this container does not exist on the disk.

5.6.212 - 2019-02-19

Requires collectorfordocker version 5.6.212 or above

  • New: Alert: high CPU usage on the host.
  • Fixed: Splunk usage dashboard - charts do not show the data, when the used indexed aren't searchable by default.
  • New: Support Dark theme.
  • New: Free text search in Logs dashboard.
  • New: Add auto-refresh options to the dashboard.
  • Fixed: Revisited CPU limits and requests for Pods and Containers.

Collectord updates:

  • Fixed: auto-recovery from the corrupted write-ahead-log in acknowledgment database.
  • New: support sampling (random and hash-based) for container/application and host logs.
  • New: when running multiple collectord on one host (with different output) - count that as one licensed host, change InstanceID format.
  • Fixed: when container is scheduled with remove flag lock the file till collectord processes it completely.
  • Fixed: collectord reports rare warning about unparsable uint64 max value from proc filesystem.
  • Fixed: collectord reports rare warning about unparsable line from proc/io files.

5.5.205 - 2019-01-25

  • Collectord fix: collectord could stop sending container file logs when the original file has been truncated (using the same Node ID as previously used log file).

5.5.203 - 2019-01-25

  • Collectord fix: collectord could send an empty X-Splunk-Request-Channel header to Splunk.

5.5.202 - 2019-01-24

Requires collectorfordocker version 5.5.202 or above

  • New: Dashboard Services -> AWS ECS. Review containers running as an ECS Service.
  • New: Dashboard Services -> Swarm Services. Review containers running as a Swarm Service.

Collectord updates:

  • Fixed: Interval 0 in prometheus input can crash the collectord.
  • Fixed: When both glob and match are set for the application logs, the glob pattern can block the match pattern from finding the files in the volume.

5.4.201 - 2018-12-19

Requires collectorfordocker version 5.4.201 or above

  • Fixed: Alerts for licenses issued with AWS Subscriptions

Collectord updates:

  • Fixed: Better handling rotated files (less open fd)
  • Fixed: Events input can hang in the err loop.

5.4 - 2018-12-17

Requires collectorfordocker version 5.4 or above

  • Compatibility update for collectord 5.4.

Collectord updates:

  • New: Attach EC2 metadata fields
  • New: Basic Auth for Proxy (License Server and Splunk)
  • Fixed: Collectord verify reports CRI-O as unsupported runtime.
  • Fixed: Rare crash on Prometheus metrics definition.
  • Fixed: Better handling of acknowledgment database corruption.
  • Fixed: When handling incorrect indexes, collectord can send index with empty string, that Splunk recognize as incorrect index

5.3 - 2018-11-19

Requires collectorfordocker version 5.3 or above

  • New: Alert for showing when Collectord reports errors in Processing pipelines (as an example if it failed to extract fields).
  • New: Alert for showing when Collectord reports warnings.
  • New: Alert if lag in the indexing of the data.
  • New: Splunk Usage (License usage, number of events) report under Setup.
  • Fixed: lookup with alerts causing very often replication activities on SHC

Collectord updates:

  • Fixed: high memory usage with Gzip compression enabled (reduced memory usage).
  • New: Allow to disable pipe.join with annotations.
  • Fixed: In high amount of logs (10,000 events per second) Collectord can read lines not in full, that can break JSON logs.
  • Fixed: When collectord writes a Warning that it failed to post to Splunk, it will write a Success message after retry.
  • New: Allow to hash sensitive data with annotations.
  • Fixed: Group network socket tables to reduce the amount of forwarded data (4 times reducing the amount of data)
  • Fixed: Identify when glob and match pattern require recursive directory traversal.
  • New: Annotation for complete disabling of the handling and forwarding logs for containers.
  • Fixed: Collectord showed few Debug messages on start.
  • Fixed: Performance improvements for log forwarding (up to 35% in high amount of logs).
  • Fixed: reduce duplication of the Kubernetes events, forwarded to Splunk.
  • Fixed: Support ECS cgroup matching with the default configuration.
  • Fixed: Support docker daemon logs forwarding with the default configuration.
  • Fixed: Failed to parse proc name from the stat file with the not paired parentheses.

5.2 - 2018-10-15

Requires collectorfordocker version 5.2 or above

  • New: Review/Storage dashboard based on storage metrics.
  • New: predefined alerts to help you monitor the health of the clusters and performance of the applications.
  • Performance improvements

Collector updates:

  • New: runtime storage metrics (usage, available, inodes)
  • New: image is built on top of SCRATCH image.
  • New: verify and diag commands for troubleshooting.
  • New: support /dev/null output for logs
  • New: override source/sourcetype and index base on regexp pattern for container logs.
  • Fixed: do not send empty docker_labels
  • New: support docker JSON tags and labels
  • Fixed: allowing a new license to unblock collector with the expired license.
  • Fixed: Prometheus parser fails to parse metrics with labels that end with a comma.
  • Fixed: Performance improvements
  • New: Prometheus parser supports basic authentication
  • Fixed: Workaround for a bug in HTTP Event Collector, that can return an incorrect index of a failed event

5.1 - 2018-09-17

Requires collectorfordocker version 5.1 or above

  • New: Network metrics (MB, Packets, Drops and Errors) for host and containers.
  • New: Network socket tables (list of port that containers and hosts are listen on, connections to external resources).
  • New: Network review dashboard to see the list of connection to public services and in private network.
  • Improvement: Replace python-based lookup with macro written with eval.
  • Improvement: Visual improvement for showing when the object was Last Seen (highlighting and showing minutes ago).
  • Improvement: Changed source of proc stats to proc root filesystem, to keep minimum list of unique sources.
  • New: Support for Splunk multi-threads outputs (for forwarding more than 3000 events per second).
  • Improvement: Performance improvements for Prometheus parsing.
  • Improvement: Calculate checksums for first bytes of files, to better identify new files with reused iNode.
  • Improvement: Reduce amount of metrics forwarded with proc_stats by excluding system threads.
  • Improvement: Configuration for gzip compression.

5.0 - 2018-09-03

Requires collectorfordocker version 5.0 or above

  • Auto-discover and forward Application logs from host mounts or local volumes.
  • Annotations for containers to change per container configurations (index, source, join rules, replaces and more).
  • Escaping terminal sequences from container logs.
  • Redirecting logs to /dev/null for specific patterns.
  • Replace patterns in container and application logs (hiding sensitive or not important information).
  • Support for extracting fields from the container logs, including timestamps.
  • Support for forwarding Prometheus metrics.
  • Include Memory and CPU limits for container lists.
  • Visual updates for the panels, highlighting high CPU and Memory usages
  • Filter cgroup stats, forward only container and host metrics.
  • Support for multiple Splunk HTTP Event Collector endpoints (support fail-over and load-balancing).
  • Handle HTTP Event Collector errors with the incorrect index. Multiple options to redirect to default index, drop or wait.
  • Add retry logic to license client to reduce amount of false positive warnings.
  • Add HTTP read timeouts (handle gateway timeouts, 504).
  • Performance optimizations.
  • Optimize payloads for higher write throughput.
  • Fixed: fail to parse the latest line in the JSON log.
  • Better error handling incorrect configurations.
  • Deprecating Join rules in favour of annotations.
  • Support for HTTP Event Collector client certificates.
  • Fixed: limit directory walkers for depth (fixing issues when directory has a mount to itself)
  • Fixed: add a limit of the maximum line size that collector can read at once (defaults to 1Mb).
  • Fixed: acknowledgement database stores now NodeID, DevID and a parent folder identifier. That way if NodeID is going to be reused right away - we will identify this file as a new one, if it is in different location.
  • Change: docker_stream field has been renamed to stream for compatibility with other container runtime.

3.0 - 2018-02-07

Requires collectorfordocker version 3.0 or above

  • Added CPU Quota, CPU Shares, Throttled and Memory Limit Overlays on Container Dashboards.
  • Performance improvement on Dashboards by combining multiple charts using one common search.
  • New "Review/Privileged containers and enabled capabilities" dashboard to list all privileged containers and enabled security capabilities for containers.
  • Fixed bug on Process Dashboard, some charts did not filter by host.
  • "Overview: Process" dashboard did not use Span token for timechart dashboards.
  • "Top: Containers" fixed incorrect memory usage (showed double size)
  • Added alerts in application for notification about outdated collector versions and expired licenses for collector.
  • Hide Wait Read/Write IO panels, when this data is not available.
  • In process Dashboard show VmRSS with RssAnon, RssFile, and RssShmem.

Collector updates:

  • Support for Splunk indexing acknowledgment.
  • HTTP Proxy support for License server and Splunk output.
  • Allow to configure destination indices for different types of data in collector configuration (stats, logs, host logs, proc stats and events).
  • Handling responses from HTTP Event Collector to skip invalid events (will be logged).
  • If container is running, but Docker does not provide metadata, allow to wait for metadata.
  • Collect security capabilities and uid/gid.
  • Support for custom labels, specified with collector configuration.
  • Support for partial logs without join rules.
  • Bug. Use local timezone by default for local syslog files.
  • Bug. Fix small memory leak on deleted containers.
  • Bug. When collector is failing to send data to Splunk, impossible to stop collector with terminate.


  • Show the index name in the output, when Splunk reports incorrect index.

collectorfordocker 3.0.93

  • Fixed: Support for Docker running on CentOS (metadata is not attached to metrics).

collectorfordocker 3.0.91

  • Fixed: Messages "WARN ... proc.go:441: Unparsable line from /rootfs/proc/X/status" caused by new Linux kernel that reports empty line in proc file system.
  • Add HTTP read timeouts (handle gateway timeouts, 504).
  • Correctly parse HTTP Event Responses when one of few events fail to be indexed (as an example, wrong index).

2.1 - 2017-10-22

Requires collectorfordocker version or above

  • Implemented collectors dashboard to track number of collectors, their versions and used licenses.
  • Fallback to the process IO statistics when blkio is not available.
  • Fix IO statistic graphs, showed average, when sum should be used.
  • collector - Improved resistance for storage failures.
  • collector - License checks reporting.

2.0 - 2017-10-22

Requires collectorfordocker version or above

  • Better labels support in Dashboards. Collector has a breaking feature, replacing format for labels from docker_labels_LABEL1=VALUE1 to docker_labels=[LABEL1=VALUE1,LABEL2=VALUE2].
  • Process level metrics.
  • Uptime for hosts and processes.
  • Fields extraction and support in dashboards for docker daemon (setup host logs collection with collector).
  • New top dashboards allow to monitor Hosts/Containers/Processes in real-time.
  • Improved dashboards navigation.
  • Support for host logs.
  • Other bugs and improvements based on user feedback.

About Outcold Solutions

Outcold Solutions provides solutions for monitoring Kubernetes, OpenShift and Docker clusters in Splunk Enterprise and Splunk Cloud. We offer certified Splunk applications, which give you insights across all containers environments. We are helping businesses reduce complexity related to logging and monitoring by providing easy-to-use and deploy solutions for Linux and Windows containers. We deliver applications, which help developers monitor their applications and operators to keep their clusters healthy. With the power of Splunk Enterprise and Splunk Cloud, we offer one solution to help you keep all the metrics and logs in one place, allowing you to quickly address complex questions on container performance.