Container Service for Kubernetes:ack-sysom-monitor component release notes - Container Service for Kubernetes

ack-sysom-monitor is a container monitoring component for Container Service for Kubernetes (ACK) that uses eBPF technology to collect kernel-layer metrics from nodes and pods.

Component overview

SysOM (System Operation & Maintenance), developed by the OpenAnolis community System O&M SIG, is a unified O&M platform for operating systems. Its monitoring component, ack-sysom-monitor, collects and enhances metrics at the kernel layer with low resource overhead.

Using eBPF, ack-sysom-monitor performs deep inspection of node and container behavior to surface issues that standard monitoring misses:

System jitter and latency spikes
Resource leaks
Abnormal pod memory usage

Metrics are exposed in standard Prometheus format. For the full list of available metrics, see Metric description. For details on using the component's monitoring capabilities, see SysOM kernel-layer container monitoring.

Billing

When ack-sysom-monitor is enabled, it sends metrics to Managed Service for Prometheus. These metrics are billed as custom metrics. Fees are charged for custom metrics.

Costs vary with cluster size and the number of running containers. To understand the billing model before enabling the component, see Billing overview. To track ongoing usage after enabling, see View resource usage.

Starting with v1.1.3, metrics for system components in the kube-system namespace are excluded by default. This reduces the total metric count. You can re-enable collection for those namespaces by updating the configuration.

Enable ack-sysom-monitor

To enable the component and start collecting kernel-layer metrics, see Enable the ack-sysom-monitor monitoring feature.

Change history

December 2025

Version	Image	Release date	Changes	Impact
1.1.3	`registry-vpc.{{.Region}}.aliyuncs.com/acs/ack-sysom-monitor:v1.1.3-9cae9e5-aliyun`	December 11, 2025	Fixed an issue that caused the ack-sysom-monitor container to restart. Added container-level event metrics for average CPU `load` and memory `oom` (out of memory) events. By default, metrics for system components such as the kube-system namespace are no longer collected. This reduces the total number of metrics. You can change the configuration to enable metric collection.	This upgrade does not affect your services.

July 2025

Version	Image	Release date	Changes	Impact
1.1.2	`registry-vpc.{{.Region}}.aliyuncs.com/acs/ack-sysom-monitor:v1.1.2-94a45de-aliyun`	July 28, 2025	Fixed an issue where pod cache files were missed during scans. Fixed a security issue in the configuration.	This upgrade does not affect your services.

May 2025

Version	Image	Release date	Changes	Impact
1.1.1	`registry-vpc.{{.Region}}.aliyuncs.com/acs/ack-sysom-monitor:v1.1.1-9300977-aliyun`	May 27, 2025	Added support for ACK 1.33. Fixed an issue that caused occasional startup errors.	This upgrade does not affect your services.

October 2024

Version	Image	Release date	Changes	Impact
1.1.0	`registry-vpc.{{.Region}}.aliyuncs.com/acs/ack-sysom-monitor:v1.1.0-6dcd0ef-aliyun`	October 28, 2024	Fixed an issue where cgroup v2 could not detect container changes. Fixed a startup error.	This upgrade does not affect your services.

August 2024

Version	Image	Release date	Changes	Impact
1.0.9	`registry-vpc.{{.Region}}.aliyuncs.com/acs/ack-sysom-monitor:v1.0.9-ce26b3a-aliyun`	August 09, 2024	Added support for the Arm64 architecture. Added support for cgroup v2. Added support for GPU memory monitoring. The Pod File Cache panel now displays node file cache and shared memory.	This upgrade does not affect your services.

May 2024

Version	Image	Release date	Changes	Impact
1.0.8	`registry-vpc.{{.Region}}.aliyuncs.com/acs/ack-sysom-monitor:v1.0.8-27e0d9c-aliyun`	May 17, 2024	Added support for using a ConfigMap to control metric exposure for SysOM features by default. Exposed data from the system namespace by default. Pod file cache monitoring now supports monitoring the file cache usage of the root cgroup. Fixed an issue where no data was available for memory reclaim latency on CentOS systems. Fixed an issue that caused abnormal pod CPU utilization.	This upgrade does not affect your services.

December 2023

Version	Image	Release date	Changes	Impact
1.0.7	`registry-vpc.{{.Region}}.aliyuncs.com/acs/ack-sysom-monitor:v1.0.7-5d8a59d-aliyun`	December 12, 2023	Fixed a double-free issue in PodMem. Fixed an issue where PodMem incorrectly judged BTF files in kernel version 5.10. Fixed a network interface card parsing failure caused by an excessive number of metric dimensions from the container network plugin. Fixed a data loss issue in PodMem on CentOS 7.9 with kernel version 3.10. The issue was caused by a missing kpagecgroup.	This upgrade does not affect your services.

September 2023

Version	Image	Release date	Changes	Impact
1.0.5	`registry-vpc.{{.Region}}.aliyuncs.com/acs/ack-sysom-monitor:v1.0.6-0085be5-aliyun`	September 21, 2023	Added support for OS kernel-level memory monitoring for nodes and pods.	This upgrade does not affect your services.