Monit docker containers how to#
Monit docker containers install#

The metrics with the Monitor column checked will actually be monitored. These metrics are total for all CPU usage, memory usage, network usage across the entire Docker instance. In addition to monitoring individual container metrics, we can also monitor metrics across the entire Docker Engine. The Docker connector provides two views of metrics: For advanced users, we continue to provide the ability to go deeper into configuration and make adjustments. This “convention over configuration” philosophy is seen throughout GroundWork Monitor. GroundWork provides a set of custom-selected metrics and thresholds so you can immediately start monitoring your cloud infrastructure with a few clicks. Since cloud providers often have hundreds of metrics, Cloud Hub automatically categorizes your metrics for you. Unlike hosts in your network, container names are often the same on different nodes, and not unique across the entire network. This will prefix the name of your containers to avoid collisions in the global network namespace. When you are monitoring multiple installations of Docker in your network, you will probably want to give each Docker node a host prefix.

Monit docker containers install#

If you are connecting to Docker running on another node in your network, ensure that you install CAdvisor into Docker on the other node so you can connect to it using it’s fully qualified domain name. Note that GroundWork comes with CAdvisor installed in Docker Compose. Cloud Hub, running in another container, can connect directly to it using its Docker Compose service name. Here we just point to the CAdvisor container, which is exposed to other containers in Docker with the name cadvisor on port 8098. Just point the connector at a server running CAdvisor on a standard port, click Test to make sure it works, and off you go!

Monit docker containers how to#

Next, let’s look at how to configure the Docker connector. This is an example of the Unified Monitoring feature in GroundWork: where metrics on a container or other monitored resource can originate from two or more different sources. Nagios and the Docker connector are monitoring the same container, merging the monitoring by host name. Notice the service named: icmp_ping_alive. In this example, this metric is in a Warning state. The red line represents a Critical threshold, whereas the orange line represents a Warning threshold. Here we have taken the Docker metric: age and using a GroundWork Cloud Hub formula, converted its value from bytes to megabytes: GW:MB2(age) : These calculated metrics are called synthetics. Here is the Service view for the Docker metric for the ElasticSearch container:Īdditional metrics can be calculated based on the values of other metrics and formulae you specify. Container File System usage (filesystem*).Container Network throughput (network*).We can see this container’s status, check times, availability over time, as well as the performance metrics. The host we are looking at here is the Nagios™ container (gw8-dockergw8_nagios_1). Let’s take a closer look at a single container in the Host view:

Note, all the hosts in our image above are GroundWork containers. The Top Problems tab in the Host Group view sorts the containers (hosts) by their availability, with worst availability sorted to the top. In the image below we are looking at a Host Group view, where all the containers are members of a host group named DOCK-H:cadvisor : Here you will see all the containers above being monitored as traditional GroundWork inventory as groups, hosts and services. Let’s look at the GroundWork Status Summary dashboard.

Out of the box, GroundWork monitors its own containers using the Docker connector. After installing GroundWork 8, you will see all the containers running that are used by the GroundWork application: Since version 8.0.0, GroundWork now runs as a Docker Compose application, so it’s a great example to work from. įirst, let’s take a look at how to connect to a Docker system running on the same machine where GroundWork is installed. In this article, we will demonstrate how to monitor containers in Docker with the GroundWork Monitor Docker connector. Monitoring Containers with the Docker Connector With Kubernetes, containers can also be replicated and load balanced in pods across clusters. Containers can be spun up to handle periodic load, and then torn down when no longer needed. For one thing, they are not physical machines nor are they virtual machines. How can you monitor containers? They are different from traditional hosts and servers. Whether it be Docker™, Docker Compose™, or Kubernetes™, the IT world is embracing this technology with great enthusiasm. Containers are the cornerstone for cloud computing and microservice architectures. Blog Post Docker Container Monitoring with GroundWork Cloud HubĬontainer technologies have captivated the computing world.