Project: HertzBeat (Observability and Analysis / Observability)
File: docker.md

id: docker title: MonitorDocker Monitor sidebar_label: Docker Monitor keywords: [open source monitoring tool, open source docker monitoring tool, monitoring docker metrics] Collect and monitor general performance Metrics of Docker containers. If you want to monitor the container information in `Docker`, you need to open the port according to the following steps, so that the collection request can obtain the corresponding information. Edit the docker.server file: ````shell vi /usr/lib/systemd/system/docker.service ```` Find the [Service] node, modify the ExecStart property, and add `-H tcp://0.0.0.0:2375` ````shell ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock -H tcp://0.0.0.0:2375 ```` This is equivalent to the 2375 port that is open to the outside world. Of course, it can be modified to other ports according to your own situation. Reload the Docker configuration to take effect: ```shell systemctl daemon-reload systemctl restart docker ```` Note: Remember to open the `2375` port number in the server console. If the above method does not work: Open the `2375` port number inside the server. ```shell firewall-cmd --zone=public --add-port=2375/tcp --permanent firewall-cmd --reload ```` | Parameter name | Parameter help description | | | - | | Monitor Host | Monitored peer IPV4, IPV6 or domain name. Note without protocol headers (eg: https://, http://). | | Monitor Name | Identifies the name of this monitor. The name needs to be unique. | | Port | The port provided by the database externally, the default is 2375. | | Query Timeout | Set the timeout when getting the Docker server API interface, in ms, the default is 3000 ms. | | Container Name | Generally monitors all running container

| | username | connection username, optional | | password | connection password, optional | | URL | Database connection URL, optional, if configured, the parameters such as database name, username and password in the URL will override the parameters configured above | | Collection Interval | Monitor periodical collection data interval, in seconds, the minimum interval that can be set is 30 seconds | | Whether to detect | Whether to detect and check the availability of monitoring before adding monitoring, and then continue to add and modify operations if the detection is successful | | Description Remarks | More remarks that identify and describe this monitoring, users can remark information here | | Metric Name | Metric Unit | Metric Help Description | | | -- | -- | | Name | None | Server Name | | version | none | docker version number | | os | none | server version eg: linux x86_64 | | root_dir | none | docker folder directory eg: /var/lib/docker | | containers | None | Total number of containers (running + not running) | | containers_running | None | Number of running containers | | containers_paused | none | number of containers in pause | | images | None | The total number of container images. | | ncpu | none | ncpu | | mem_total | MB | Total size of memory used | | system_time | none | system time | | Metric Name | Metric Unit | Metric Help Description | | -- | -- | | | id | None | The ID of the container in Docker | | name | None | The container name in the Docker container | | image | None | Image used by the Docker container | | command | None | Default startup command in Docker | | state | None | The running state of the container in Docker | | status | None | Update time in Docker container | | Metric Name | Metric Unit | Metric Help Description | | - | -- | | | name | None | The name in the Docker container | | available_memory | MB | The amount of memory that the Docker container can utilize | | used_memory | MB | The amount of memory already used by the Docker container | | memory_usage | None | Memory usage of the Docker container | | cpu_delta | None | The number of CPUs already used by the Docker container | | number_cpus | None | The number of CPUs that the Docker container can use | | cpu_usage | None | Docker container CPU usage |