基本的なコマンドがDockerイメージにインストールされているかを確認する

Dockerfileを書くときに、どのDockerイメージにどのコマンドがインストールされているのか確認してみました。

確認方法

以下のスクリプトを実行。

#!/bin/bash

images=(
  oraclelinux:7.3
  debian:jessie
  buildpack-deps:jessie-scm
  alpine:3.5
  ubuntu:16.04
)

commands=(
  awk
  bash
  curl
  git
  make
  python
  python3
  wget
)

for image in "${images[@]}"; do
  docker pull "$image"
done

for image in "${images[@]}"; do
  echo "### $image ###"
  for com in "${commands[@]}"; do
    echo "echo $com: \$(command -v $com 2>/dev/null || echo 'not found')" | docker run -i --rm "$image" sh
  done
  echo
done

確認結果

### oraclelinux:7.3 ###
awk: /usr/bin/awk
bash: /usr/bin/bash
curl: /usr/bin/curl
git: not found
make: not found
python: /usr/bin/python
python3: not found
wget: not found

### debian:jessie ###
awk: /usr/bin/awk
bash: /bin/bash
curl: not found
git: not found
make: not found
python: not found
python3: not found
wget: not found

### buildpack-deps:jessie-scm ###
awk: /usr/bin/awk
bash: /bin/bash
curl: /usr/bin/curl
git: /usr/bin/git
make: not found
python: /usr/bin/python
python3: not found
wget: /usr/bin/wget

### alpine:3.5 ###
awk: /usr/bin/awk
bash: not found
curl: not found
git: not found
make: not found
python: not found
python3: not found
wget: /usr/bin/wget

### ubuntu:16.04 ###
awk: /usr/bin/awk
bash: /bin/bash
curl: not found
git: not found
make: not found
python: not found
python3: not found
wget: not found