Migrating from Docker-only to generic container metrics in Dynatrace

mreider — Thu, 11 Aug 2022 06:38:34 GMT

Docker Inc, founded by Soloman Hykes, laid the foundation for cloud native computing. Built upon the Linux addition of LXC cgroups in 2008, Docker became the de-facto runtime engine for containerized workloads.

Today we have some alternative container runtimes to choose from including containerd and CRI-O, which use the Container Runtime Interface (CRI) as a standard way of integrating with Kubernetes. In 2019 the Kubernetes team decided to deprecate support for Docker, in favor or containerd and CRI-O, as it requires an extra translation layer (“shim”) for CRI support. Docker compatibility will continue through Kubernetes 1.22, expected later this year, though major cloud providers may end Docker support months earlier.

Seamless migration to containerd and CRI-O

Containerd and CRI-O support was enabled by default in Dynatrace environments created after v1.83 (fall of 2019). If you’re unsure of your environment’s birthdate, or you want to confirm a frictionless transition from the Docker runtime to containerd and CRI-O, navigate to Settings > Processes and Containers > Container Monitoring and enable both settings.

Important Dynatrace monitoring changes

As the industry shifts towards generic container metrics so will Dynatrace. Please walk through the following steps to avoid potential monitoring or alerting problems as Dynatrace begins its own deprecation timeline for Docker-only support, targeted at removal on ~~January 1, 2022~~ September 2022. Please note, the deprecation will not cover container injection for automated deep monitoring of processes in Docker containers, but Docker specific container metrics and screens.

Browse through the list of metrics in the table below.
Communicate with your team that these metrics come directly from the Docker API, rather than from a generic place. Let them know that any dashboards, alerts or API integrations using these metrics must be modified.
Let your team know the Docker screen in Dynatrace will be replaced by generic container views, and refer them to this article if they have questions.

Deprecated (Docker-only) metric	Generic container metric
Container bytes received builtin:containers.bytes_rx2	builtin:tech.nettracer.bytes_rx
Container bytes transmitted builtin:containers.bytes_tx2	builtin:tech.nettracer.bytes_tx
Devicemapper data space available builtin:containers.devicemapper_data_space_available	No generic container-level metric planned. In K8s please use the PVC extension.
Devicemapper data space used builtin:containers.devicemapper_data_space_used	No generic container-level metric planned. In K8s please use the PVC extension.
Devicemapper meta-data space available builtin:containers.devicemapper_metadata_space_available	No generic container-level metric planned. In K8s please use the PVC extension.
Devicemapper meta-data space used builtin:containers.devicemapper_metadata_space_used	No generic container-level metric planned. In K8s please use the PVC extension.
Container cpu usage builtin:containers.cpu_usage2	builtin:containers.cpu.usagePercent builtin:containers.cpu.usagePercent
Container memory percent builtin:containers.memory_percent	builtin:containers.memory.usagePercent
Container memory usage builtin:containers.memory_usage2	builtin:containers.memory.residentSetBytes
Container throttled time builtin:containers.throttled_time2	builtin:containers.cpu.throttledTime builtin:containers.cpu.throttledMilliCores
Number of containers running builtin:containers.no_of_containers_running	Use this expression: builtin:containers.cpu.usageSystemMilliCores:splitBy():count Note: Metric expression can be used for the overall number of containers in an environment. Splitting by image is subject to further improvement.
Number of containers launched builtin:containers.no_of_containers_launched	removed
Number of containers terminated builtin:containers.no_of_containers_terminated	removed Note: You can use Process Group availability settings to monitor if any process becomes unavailable or to define a certain threshold (e.g. how many process group instances must be available). Containers, which have been terminated unexpectedly, will impact Process Group (Instance) availability.
Number of containers running builtin:containers.no_of_containers_per_pgi	removed

New generic container metrics in Dynatrace

Our migration to generic container support brings along a handful of benefits including new metrics in the data explorer, as well as container metrics in a number of different screens such as the workload view shown below.

Re: Migrating from Docker-only to generic container metrics in Dynatrace

ChadTurner — Mon, 09 Jan 2023 16:34:22 GMT

great update @mreider

topic Migrating from Docker-only to generic container metrics in Dynatrace in Dynatrace tips

Migrating from Docker-only to generic container metrics in Dynatrace

Re: Migrating from Docker-only to generic container metrics in Dynatrace