dive action

dive action is an action that allows developers who develop Docker image to run dive on GitHub Actions. dive is a tool for exploring a docker image, layer contents, and discovering ways to shrink the size of your Docker/OCI image. Integrating dive into your CI will let you reduce your container image size as early as possible.

Usage

Inputs

Name	Type	Required	Default	Description
image	String	true		Image to analyze
config-file	String	false	${{ github.workspace }}/.dive.yaml	Path to dive config file
github-token	String	false		GitHub token to post PR comment on dive failure

Workflow

name: "Dive CI"

on: [push]

jobs:
  dive:
    runs-on: ubuntu-latest
    name: Analyze image efficiency
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Build image
        run: docker build -t sample:latest .
      - name: Dive
        uses: yuichielectric/[email protected]
        with:
          image: "sample:latest"
          config-file: ${{ github.workspace }}/.dive-ci.yml
          github-token: ${{ secrets.GITHUB_TOKEN }}

Config file

There are three metrics supported by dive config file. See here for details.

rules:
  # If the efficiency is measured below X%, mark as failed.
  # Expressed as a ratio between 0-1.
  lowestEfficiency: 0.95

  # If the amount of wasted space is at least X or larger than X, mark as failed.
  # Expressed in B, KB, MB, and GB.
  highestWastedBytes: 20MB

  # If the amount of wasted space makes up for X% or more of the image, mark as failed.
  # Note: the base image layer is NOT included in the total image size.
  # Expressed as a ratio between 0-1; fails if the threshold is met or crossed.
  highestUserWastedPercent: 0.20

Output

Unable to find image 'wagoodman/dive:v0.9' locally
v0.9: Pulling from wagoodman/dive
89d9c30c1d48: Pulling fs layer
5ac8ae86f99b: Pulling fs layer
f10575f61141: Pulling fs layer
89d9c30c1d48: Verifying Checksum
89d9c30c1d48: Download complete
f10575f61141: Verifying Checksum
f10575f61141: Download complete
5ac8ae86f99b: Verifying Checksum
5ac8ae86f99b: Download complete
89d9c30c1d48: Pull complete
5ac8ae86f99b: Pull complete
f10575f61141: Pull complete
Digest: sha256:2d3be9e9362ecdcb04bf3afdd402a785b877e3bcca3d2fc6e10a83d99ce0955f
Status: Downloaded newer image for wagoodman/dive:v0.9
  Using CI config: /.dive-ci
Image Source: docker://sample:latest
Fetching image... (this can take a while for large images)
Analyzing image...
  efficiency: 98.8091 %
  wastedBytes: 11697960 bytes (12 MB)
  userWastedPercent: 1.6116 %
Inefficient Files:
Count  Wasted Space  File Path
    6        4.9 MB  /var/cache/debconf/templates.dat
    4        3.2 MB  /var/cache/debconf/templates.dat-old
    6        1.2 MB  /var/lib/dpkg/status
    6        1.2 MB  /var/lib/dpkg/status-old
    5        400 kB  /var/log/dpkg.log
    5        211 kB  /var/log/apt/term.log
    6        107 kB  /etc/ld.so.cache
    6         83 kB  /var/cache/debconf/config.dat
    6         71 kB  /var/lib/apt/extended_states
    6         67 kB  /var/log/apt/eipp.log.xz
    5         54 kB  /var/cache/ldconfig/aux-cache
    4         40 kB  /var/cache/debconf/config.dat-old
    5         39 kB  /var/log/apt/history.log
    4         26 kB  /var/log/alternatives.log
    2        9.1 kB  /etc/mailcap
    2         903 B  /etc/group
    2         892 B  /etc/group-
    2         756 B  /etc/gshadow
    2         727 B  /var/lib/dpkg/triggers/File
    2           0 B  /usr/src
    6           0 B  /var/lib/dpkg/lock-frontend
    6           0 B  /var/lib/dpkg/lock
    5           0 B  /var/lib/apt/lists
    3           0 B  /var/lib/dpkg/triggers/Unincorp
    6           0 B  /var/lib/dpkg/updates
    5           0 B  /var/cache/apt/archives/lock
    6           0 B  /var/cache/debconf/passwords.dat
    5           0 B  /var/cache/apt/archives/partial
    2           0 B  /etc/.pwd.lock
    6           0 B  /tmp
    6           0 B  /var/lib/dpkg/triggers/Lock
Results:
  PASS: highestUserWastedPercent
  PASS: highestWastedBytes
  FAIL: lowestEfficiency: image efficiency is too low (efficiency=0.988091457351898 < threshold=0.99)
Result:FAIL [Total:3] [Passed:2] [Failed:1] [Warn:0] [Skipped:0]

##[error]Process completed with exit code 1.