ubi8-minimalを使ったコンテナイメージの容量削減の試行錯誤で確認。RHEL 8.xでも同様と想定される。
- dnfで
python39とpython3-pipをインストールするとpython36とpython39 moduleが有効になっている - dnf install前にpython36 moduleを無効にするとpipがインストールできない
再現
（下記作業はubi8-minimalコンテナ内）
通常通りpython39とpython3-pipをインストール
[root@8f3c12facb9f /]# microdnf install --disableplugin=subscription-manager --nodocs -y python39 python3-pip
出力結果を開く
Downloading metadata...
Downloading metadata...
Downloading metadata...
Package Repository Size
Installing:
gdbm-1:1.18-1.el8.x86_64 ubi-8-baseos 132.9 kB
gdbm-libs-1:1.18-1.el8.x86_64 ubi-8-baseos 62.0 kB
libnsl2-1.2.0-2.20180605git4a062cf.el8.x86_64 ubi-8-baseos 59.1 kB
libtirpc-1.1.4-4.el8.x86_64 ubi-8-baseos 115.5 kB
platform-python-3.6.8-37.el8.x86_64 ubi-8-baseos 86.1 kB
platform-python-pip-9.0.3-19.el8.noarch ubi-8-baseos 1.8 MB
platform-python-setuptools-39.2.0-6.el8.noarch ubi-8-baseos 647.5 kB
python3-libs-3.6.8-37.el8.x86_64 ubi-8-baseos 8.2 MB
python3-pip-9.0.3-19.el8.noarch ubi-8-appstream 20.2 kB
python3-pip-wheel-9.0.3-19.el8.noarch ubi-8-baseos 1.1 MB
python3-setuptools-39.2.0-6.el8.noarch ubi-8-baseos 166.5 kB
python3-setuptools-wheel-39.2.0-6.el8.noarch ubi-8-baseos 295.8 kB
python36-3.6.8-2.module+el8.1.0+3334+5cb623d7.x86_64 ubi-8-appstream 19.6 kB
python39-3.9.2-1.module+el8.4.0+10237+bdc77aac.x86_64 ubi-8-appstream 32.8 kB
python39-libs-3.9.2-1.module+el8.4.0+10237+bdc77aac.x86_64 ubi-8-appstream 8.5 MB
python39-pip-20.2.4-3.module+el8.4.0+9822+20bf1249.noarch ubi-8-appstream 2.1 MB
python39-pip-wheel-20.2.4-3.module+el8.4.0+9822+20bf1249.noarch ubi-8-appstream 1.3 MB
python39-setuptools-50.3.2-3.module+el8.4.0+9822+20bf1249.noarch ubi-8-appstream 891.6 kB
python39-setuptools-wheel-50.3.2-3.module+el8.4.0+9822+20bf1249.noarch ubi-8-appstream 508.5 kB
Transaction Summary:
Installing: 19 packages
Reinstalling: 0 packages
Upgrading: 0 packages
Obsoleting: 0 packages
Removing: 0 packages
Downgrading: 0 packages
Enabling module streams:
python36:3.6
python39:3.9
Downloading packages...
Running transaction test...
Installing: libtirpc;1.1.4-4.el8;x86_64;ubi-8-baseos
Installing: gdbm-libs;1:1.18-1.el8;x86_64;ubi-8-baseos
Installing: libnsl2;1.2.0-2.20180605git4a062cf.el8;x86_64;ubi-8-baseos
Installing: python3-pip-wheel;9.0.3-19.el8;noarch;ubi-8-baseos
Installing: python3-setuptools-wheel;39.2.0-6.el8;noarch;ubi-8-baseos
Installing: gdbm;1:1.18-1.el8;x86_64;ubi-8-baseos
Installing: platform-python-pip;9.0.3-19.el8;noarch;ubi-8-baseos
Installing: python3-libs;3.6.8-37.el8;x86_64;ubi-8-baseos
Installing: platform-python;3.6.8-37.el8;x86_64;ubi-8-baseos
Installing: platform-python-setuptools;39.2.0-6.el8;noarch;ubi-8-baseos
Installing: python3-setuptools;39.2.0-6.el8;noarch;ubi-8-baseos
Installing: python3-pip;9.0.3-19.el8;noarch;ubi-8-appstream
Installing: python36;3.6.8-2.module+el8.1.0+3334+5cb623d7;x86_64;ubi-8-appstream
Installing: python39-pip-wheel;20.2.4-3.module+el8.4.0+9822+20bf1249;noarch;ubi-8-appstream
Installing: python39-setuptools-wheel;50.3.2-3.module+el8.4.0+9822+20bf1249;noarch;ubi-8-appstream
Installing: python39-libs;3.9.2-1.module+el8.4.0+10237+bdc77aac;x86_64;ubi-8-appstream
Installing: python39;3.9.2-1.module+el8.4.0+10237+bdc77aac;x86_64;ubi-8-appstream
Installing: python39-setuptools;50.3.2-3.module+el8.4.0+9822+20bf1249;noarch;ubi-8-appstream
Installing: python39-pip;20.2.4-3.module+el8.4.0+9822+20bf1249;noarch;ubi-8-appstream
Complete.
- python36とpython39 moduleが有効化されている
Enabling module streams:
python36:3.6
python39:3.9
python36 moduleを無効化してpython39とpython3-pipをインストール
[root@4fdfe700d1a3 /]# microdnf module disable python36
(microdnf:6): librhsm-WARNING **: 17:33:05.542: Found 0 entitlement certificates
(microdnf:6): librhsm-WARNING **: 17:33:05.544: Found 0 entitlement certificates
Downloading metadata...
Downloading metadata...
Downloading metadata...
Disabling modules:
python36
Running transaction test...
[root@4fdfe700d1a3 /]# microdnf install --disableplugin=subscription-manager --nodocs -y python39 python3-pip
error: Could not depsolve transaction; 1 problem detected:
Problem: package python3-pip-9.0.3-19.el8.noarch requires /usr/bin/python3.6, but none of the providers can be installed
- package python3-pip-9.0.3-19.el8.noarch requires python36, but none of the providers can be installed
- conflicting requests
- package python36-3.6.8-2.module+el8.1.0+3334+5cb623d7.x86_64 is filtered out by modular filtering
- エラーになってインストールができない
python36 moduleを有効化して再度python39とpython3-pipをインストール
[root@4fdfe700d1a3 /]# microdnf module enable python36
出力結果を開く
(microdnf:56): librhsm-WARNING **: 17:33:59.636: Found 0 entitlement certificates
(microdnf:56): librhsm-WARNING **: 17:33:59.637: Found 0 entitlement certificates
Enabling module streams:
python36:3.6
Running transaction test...
[root@4fdfe700d1a3 /]# microdnf install --disableplugin=subscription-manager --nodocs -y python39 python3-pip
Package Repository Size
Installing:
gdbm-1:1.18-1.el8.x86_64 ubi-8-baseos 132.9 kB
gdbm-libs-1:1.18-1.el8.x86_64 ubi-8-baseos 62.0 kB
libnsl2-1.2.0-2.20180605git4a062cf.el8.x86_64 ubi-8-baseos 59.1 kB
libtirpc-1.1.4-4.el8.x86_64 ubi-8-baseos 115.5 kB
platform-python-3.6.8-37.el8.x86_64 ubi-8-baseos 86.1 kB
platform-python-pip-9.0.3-19.el8.noarch ubi-8-baseos 1.8 MB
platform-python-setuptools-39.2.0-6.el8.noarch ubi-8-baseos 647.5 kB
python3-libs-3.6.8-37.el8.x86_64 ubi-8-baseos 8.2 MB
python3-pip-9.0.3-19.el8.noarch ubi-8-appstream 20.2 kB
python3-pip-wheel-9.0.3-19.el8.noarch ubi-8-baseos 1.1 MB
python3-setuptools-39.2.0-6.el8.noarch ubi-8-baseos 166.5 kB
python3-setuptools-wheel-39.2.0-6.el8.noarch ubi-8-baseos 295.8 kB
python36-3.6.8-2.module+el8.1.0+3334+5cb623d7.x86_64 ubi-8-appstream 19.6 kB
python39-3.9.2-1.module+el8.4.0+10237+bdc77aac.x86_64 ubi-8-appstream 32.8 kB
python39-libs-3.9.2-1.module+el8.4.0+10237+bdc77aac.x86_64 ubi-8-appstream 8.5 MB
python39-pip-20.2.4-3.module+el8.4.0+9822+20bf1249.noarch ubi-8-appstream 2.1 MB
python39-pip-wheel-20.2.4-3.module+el8.4.0+9822+20bf1249.noarch ubi-8-appstream 1.3 MB
python39-setuptools-50.3.2-3.module+el8.4.0+9822+20bf1249.noarch ubi-8-appstream 891.6 kB
python39-setuptools-wheel-50.3.2-3.module+el8.4.0+9822+20bf1249.noarch ubi-8-appstream 508.5 kB
Transaction Summary:
Installing: 19 packages
Reinstalling: 0 packages
Upgrading: 0 packages
Obsoleting: 0 packages
Removing: 0 packages
Downgrading: 0 packages
Enabling module streams:
python39:3.9
Downloading packages...
Running transaction test...
Installing: libtirpc;1.1.4-4.el8;x86_64;ubi-8-baseos
Installing: gdbm-libs;1:1.18-1.el8;x86_64;ubi-8-baseos
Installing: libnsl2;1.2.0-2.20180605git4a062cf.el8;x86_64;ubi-8-baseos
Installing: python3-pip-wheel;9.0.3-19.el8;noarch;ubi-8-baseos
Installing: python3-setuptools-wheel;39.2.0-6.el8;noarch;ubi-8-baseos
Installing: gdbm;1:1.18-1.el8;x86_64;ubi-8-baseos
Installing: platform-python-pip;9.0.3-19.el8;noarch;ubi-8-baseos
Installing: python3-libs;3.6.8-37.el8;x86_64;ubi-8-baseos
Installing: platform-python;3.6.8-37.el8;x86_64;ubi-8-baseos
Installing: platform-python-setuptools;39.2.0-6.el8;noarch;ubi-8-baseos
Installing: python3-setuptools;39.2.0-6.el8;noarch;ubi-8-baseos
Installing: python3-pip;9.0.3-19.el8;noarch;ubi-8-appstream
Installing: python36;3.6.8-2.module+el8.1.0+3334+5cb623d7;x86_64;ubi-8-appstream
Installing: python39-pip-wheel;20.2.4-3.module+el8.4.0+9822+20bf1249;noarch;ubi-8-appstream
Installing: python39-setuptools-wheel;50.3.2-3.module+el8.4.0+9822+20bf1249;noarch;ubi-8-appstream
Installing: python39-libs;3.9.2-1.module+el8.4.0+10237+bdc77aac;x86_64;ubi-8-appstream
Installing: python39;3.9.2-1.module+el8.4.0+10237+bdc77aac;x86_64;ubi-8-appstream
Installing: python39-setuptools;50.3.2-3.module+el8.4.0+9822+20bf1249;noarch;ubi-8-appstream
Installing: python39-pip;20.2.4-3.module+el8.4.0+9822+20bf1249;noarch;ubi-8-appstream
Complete.
- python39 moduleが追加で有効化され、無事インストールが完了
