Molecule+Dockerをプロキシ下で使う
Contents
環境
Host
- macOS Mojave
- Docker 18.09.2
- Python 3.7.3
- Pip 19.1.1
PyPI packages
背景
Molecule で Docker driver を使う際、実行環境がプロキシ下だと次のようなエラーが発生する。
$ molecule create
...
TASK [Create Dockerfiles from image names] *************************************
failed: [localhost] (item=None) => {"censored": "the output has been hidden due to the fact that 'no_log: true' was specified for this result", "changed": false}
fatal: [localhost]: FAILED! => {"censored": "the output has been hidden due to the fact that 'no_log: true' was specified for this result", "changed": false}
PLAY RECAP *********************************************************************
localhost : ok=0 changed=0 unreachable=0 failed=1
ERROR:
対策
Molecule プロジェクト配下の、各ファイルにプロキシ設定を追加することで解決できる。
module/default/Dockerfile.j2molecule/default/molecule.yml
以下のサンプルコード では、ホストの環境変数 http_proxy , https_proxy , no_proxy が適用される。
Dockerfile.j2 (Python 3)
# Molecule managed
{% if item.registry is defined %}
FROM {{ item.registry.url }}/{{ item.image }}
{% else %}
FROM {{ item.image }}
{% endif %}
{% if item.environment is defined %}
{% for key, value in item.environment.items() %}
{% if value %}
ENV {{ key }} {{ value }}
{% endif %}
{% endfor %}
{% endif %}
RUN if [ $(command -v apt-get) ]; then apt-get update && apt-get install -y python sudo bash ca-certificates && apt-get clean; \
elif [ $(command -v dnf) ]; then dnf makecache && dnf --assumeyes install python sudo python-devel python*-dnf bash && dnf clean all; \
elif [ $(command -v yum) ]; then yum makecache fast && yum install -y python sudo yum-plugin-ovl bash && sed -i 's/plugins=0/plugins=1/g' /etc/yum.conf && yum clean all; \
elif [ $(command -v zypper) ]; then zypper refresh && zypper install -y python sudo bash python-xml && zypper clean -a; \
elif [ $(command -v apk) ]; then apk update && apk add --no-cache python sudo bash ca-certificates; \
elif [ $(command -v xbps-install) ]; then xbps-install -Syu && xbps-install -y python sudo bash ca-certificates && xbps-remove -O; fi
molecule.yml
---
dependency:
name: galaxy
driver:
name: docker
lint:
name: yamllint
platforms:
- name: instance
image: centos:7
environment:
http_proxy: ${http_proxy}
https_proxy: ${https_proxy}
no_proxy: ${no_proxy}
provisioner:
name: ansible
lint:
name: ansible-lint
verifier:
name: testinfra
lint:
name: flake8