https://github.com/docker-archive/ip-util-check

:white_check_mark: Docker IP Utilization Check Script
https://github.com/docker-archive/ip-util-check

Last synced: about 2 months ago
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:white_check_mark: Docker IP Utilization Check Script

• Host: GitHub
• URL: https://github.com/docker-archive/ip-util-check
• Owner: docker-archive
• Archived: true
• Fork: true (ctelfer/docker-ip-util-check)
• Created: 2018-11-01T22:56:45.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2022-04-21T18:29:19.000Z (over 2 years ago)
• Last Synced: 2024-06-11T04:31:19.848Z (4 months ago)
• Language: Shell
• Homepage:
• Size: 10.7 KB
• Stars: 11
• Watchers: 6
• Forks: 15
• Open Issues: 2
• Metadata Files:
  • Readme: README.md

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README

        
Docker IP Utilization Check Script

==================================

This script scans the Docker overlay networks in a swarm and attempts to

determine whether the network has available capacity in its IP address

subnet ranges to upgrade to an 18.06 version of the docker engine from

an older version of the engine.  (However, as it turns out the 18.03

version of the engine has a one-time fix that will prevent issues

upgrading to 18.06 or later.)  The reason that such an upgrade may not

be seemless is that the 18.06 engine introduced a scalability

improvement to Docker load balancing that requires allocating an

additional IP address per node in the docker cluster that attaches to

the overlay network.

The script flags several potential conditions for each overlay:

  * IP address space is already completely exhausted

  * IP address space will be over capacity if upgrading to Docker engine

    18.06 or late

  * IP address space *could* become exhausted in the overlay if the

    cluster size scales up to a certain number of nodes

  * IP address space is allocated to > 80% capacity

Building the Container

======================

docker image build -t docker/ip-util-check .

Running the Container

=====================

    docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock \

            docker/ip-util-check