7.6 KiB
Weave Scope
Weave Scope automatically generates a map of your containers, enabling you to intuitively understand, monitor, and control your applications.
Scope does not need any configuration and does not require the Weave Network.
Architecture
Weave Scope consists of two components: the App and the Probe. These two
components are deployed as a single Docker container using the scope
script:
sudo scope launch
The Probe is responsible for gathering information about the host is it running on. This information is sent to the app in the form of a report. The App is responsible for processing reports from the probe into useable topologies, serving the UI and pushing these topologies to the UI.
+-------------------------------+ +-------------------------------+
| | | |
| Docker Host | | Your laptop |
| | | |
| +---------------------------+ | | +-----------------------+ |
| | | | | | | |
| | Weave Scope Container | | -------->| Your web browser | |
| | | | / | | | |
| | +-----------------------+ | | / | +-----------------------+ |
| | | | | | / | |
| | | Scope-app |<------- +-------------------------------+
| | | | | |
| | +------------+----------+ | |
| | ^ | |
| | | | |
| | +------------+----------+ | |
| | | | | |
| | | Scope-probe | | |
| | | | | |
| | +-----------------------+ | |
| | | |
| +---------------------------+ |
| |
+-------------------------------+
Multi host setup
When running Scope in a cluster, each Probe sends reports to each App. The App merges the reports from each probe into a more complete report.
+-------------------------------+ +-------------------------------+
| | | |
| Docker Host 1 | | Docker Host 2 |
| | | |
| +---------------------------+ | | +---------------------------+ |
| | | | | | | |
| | Weave Scope Container | | | | Weave Scope Container | |
| | | | | | | |
| | +-----------------------+ | | | | +-----------------------+ | |
| | | | | | | | | | | |
| | | Scope-app |<------ ------>| Scope-app | | |
| | | | | | \ / | | | | | |
| | +------------+----------+ | | \ / | | +------------+----------+ | |
| | ^ | | \/ | | ^ | |
| | | | | /\ | | | | |
| | +------------+----------+ | | / \ | | +------------+----------+ | |
| | | | | | / \ | | | | | |
| | | Scope-probe +------- -------+ Scope-probe | | |
| | | | | | | | | | | |
| | +-----------------------+ | | | | +-----------------------+ | |
| | | | | | | |
| +---------------------------+ | | +---------------------------+ |
| | | |
+-------------------------------+ +-------------------------------+
If you run Scope on the same machine as the Weave Network, the Probe will use WeaveDNS to automatically discover other Apps on your network. Therefore, if you have a running WeaveDNS setup, you do not need to take any further steps.
If you do not wish to use WeaveDNS, you can instruct Scope to cluster with other Scope instances on the command line. Hostnames and IP addresses are acceptable, both with and without ports:
# weave launch scope1:4030 192.168.0.12 192.168.0.11:4030
Using Scope Service
Scope can also be used to feed reports to the Scope Service. The Scope Service allows you centrally manage and share access to your Scope UI. In this configuration, you only run the Probe locally - the Apps are hosted for you.
To get an account on the Scope Service, sign up at scope.weave.works. You need to run a Probe on every machine you want to monitor with Scope. To launch a Probe and send reports to the service, run the following command:
sudo scope launch --service-token=<service token>
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||
+-----------------------------+ || +-----------------------------+
| | || | |
| Docker Host | || | Docker Host |
| | || | |
| +-------------------------+ | || | +-------------------------+ |
| | | | || | | | |
| | Weave Scope Container | | || | | Weave Scope Container | |
| | | | || | | | |
| | +------------+--------+ | | / \ | | +------------+--------+ | |
| | | | | | / \ | | | | | |
| | | Scope-probe +--------- ---------+ Scope-probe | | |
| | | | | | | | | | | |
| | +---------------------+ | | | | +---------------------+ | |
| | | | | | | |
| +-------------------------+ | | +-------------------------+ |
| | | |
+-----------------------------+ +-----------------------------+