Container sig#1 ansible-container
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Ansible Container is a tool that uses Ansible playbooks to build and deploy Docker containers. It was created because Ansible is commonly used to manage containers, shell scripts are limited, and Ansible can bridge containers to orchestration tools. With Ansible Container, a playbook replaces the Dockerfile for building images from roles and tasks. It aims to end the need for complex shell scripts by providing a simple way to build, run, push and deploy containers using Ansible. Key commands are init to set up project files, build to build the image, run to start containers, and push to upload images to a registry.
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Container sig#1 ansible-container
- 2. Table of contents • What is Ansible Container? • Why Ansible Container Project begins? • How to use ansible-container? • Ansible Container Demonstration 2
- 4. ansible-container shipit push build run build, run, push and shipit init
- 6. Feature • Docker ImageのビルドはDockerfileからPlaybookへ • Playbook=Ansible Moduleでビルド/デプロイ • PlaybookはYAML形式、docker-composeユーザに優しい 6
- 7. ansible-container init (ver 0.1) 7 $ ansible-container init $ tree ansible ansible/ ├── container.yml ├── main.yml └── requirements.txt
- 8. ansible-container init 8 container.yml • Dockerfileやdocker-compose.ymlに相当 • Imageやバージョン、マップするポート、環境変数などを定義 main.yml • Master Playbook (site.yml)に相当 • イメージをビルドする際に実行するAnsibleのRoleやTaskを定義 • container.ymlが自動で生成したインベントリを参照 requirements.txt • イメージをビルドする際に必要なPythonライブラリを定義 • pipのフォーマットに準拠
- 9. ansible-container init (ver 0.2) 9 $ ansible-container init $ tree ansible ansible/ ├── ansible.cfg ├── container.yml ├── main.yml ├── meta.yml ├── requirements.txt └── requirements.yml
- 10. Why Ansible Container Project begins? 10
- 11. Ansible Container Project “5 REASONS WE STARTED THE ANSIBLE CONTAINER PROJECT” https://www.ansible.com/blog/ansible-container-project 1. Because our community has been using Ansible to manage containers for quite a while now. 2. Because the new Docker connection plug-in makes it far simpler to run Ansible against a Docker container. 3. Because shell scripts aren’t good enough. 4. Because Ansible can be a great bridge to larger-scale container orchestration. 5. Because we believe that communities make the best software. 11
- 12. Ansible Community & Docker Docker ContainerをPlaybookで管理 • Docker Hubに公開しているAnsibleのイメージは約1,000件に • メンバーが様々なDocker ContainerのベストプラクティスをBlog に公開 • 集約されたナレッジをツールとして開発する流れに Docker Moduleや機能を拡張 • Docker ModuleがAnsible Moduleの中で最も利用される • Connection PluginにDocker Connection Pluginをリリース • 初期のDocker ModuleはDeprecated https://docs.ansible.com/ansible/guide_docker.html • 2.2からdocker_containerやdocker_imageに置き換え https://github.com/ansible/ansible-modules- core/blob/devel/cloud/docker/_docker.py 12
- 13. Ansible Docker Modules & Plugins 13 Version Module/Plugin Feature 1.4 (2013) docker (Deprecated) Docker Moduleのオリジナル docker build, load, pull, push, tagなどに相当 1.6 Dynamic Inventory Docker ContainerのInventoryを動的に生成 2.0 Docker Connection Docker Containerにsshを利用せずに接続 2.0 docker_login docker login に相当 2.1 docker_service docker-composeに相当, version 1, 2に対応 2.1 docker_container Docker Containerをデプロイ 2.1 docker_image_facts Docker HostでキャッシュしたDockerイメージを Inspect, Factsなどに利用 2.2 (2016) docker_network docker network に相当
- 14. Docker Connection Plugin 14 Ansible 2.1でDocker Connection Pluginをリリース • Connection DriverにDocker Connection Pluginを指定 • Playbookの実行にdocker execを利用 • PlaybookはVM, Containerで互換性を保てる? 2.1 sshd app app
- 15. End the bash madness 15 "Ansible Container represents an end to the command && command && command (and so on) syntax you’ve been struggling with to build containers.” https://www.ansible.com/ansible-container # grab tini for signal processing and zombie killing ENV TINI_VERSION v0.9.0 RUN set -x && curl -fSL "https://$URI/$TINI_VERSION/tini" -o /usr/local/bin/tini && curl -fSL "https://$URI/$TINI_VERSION/tini.asc" -o /usr/local/bin/tini.asc && export GNUPGHOME="$(mktemp -d)" && gpg --keyserver ha.pool.sks-keyservers.net --recv-keys 6380DC428747F6C393FEACA59A84159D7001A4E5 && gpg --batch --verify /usr/local/bin/tini.asc /usr/local/bin/tini && rm -r "$GNUPGHOME" /usr/local/bin/tini.asc && chmod +x /usr/local/bin/tini && tini -h
- 17. Usage: $ ansible-container --help 17 Command Docker Command Feature init ansible-garaxy init テンプレートを生成 build docker build docker-compose build Docker Imageをビルド run docker run docker-compose up Docker Containerを起動 push docker push Docker RegistryにImageを プッシュ shipit oc new-app oc run オーケストレーション環境に デプロイ e.g. Kubernetes, OpenShift
- 19. Demonstration 19
- 20. build & run 20 Prerequisites • Python 2.7 • pip • setuptools 20.0.0+ • Docker 1.11 or access to a Docker daemon. Installation $ sudo pip install ansible-container $ ansible-container version Build & Run $ git clone https://github.com/ansible/ansible-container-examples.git $ cd ansible-container-examples/ ; cp -r helloworld-nginx/ ansible $ ansible-container build $ ansible-container run –d $ ansible-container stop Push $ docker login $ ansible-container push
- 21. Reference 21 Ansible Container https://github.com/ansible/ansible-container Documentation https://www.ansible.com/ansible-container ansible-container-examples https://github.com/ansible/ansible-container-examples 5 REASONS WE STARTED THE ANSIBLE CONTAINER PROJECT https://www.ansible.com/blog/ansible-container-project 6 WAYS ANSIBLE MAKES DOCKER-COMPOSE BETTER https://www.ansible.com/blog/six-ways-ansible-makes-docker-compose- better ANSIBLE AND CONTAINERS: WHY AND HOW https://www.ansible.com/blog/ansible-and-containers-why-and-how
- 22. Q&A 22