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				<section>
					<h2>Docker and Ansible</h2>
					<h3>Daniel Kraic</h3>
					<h4>2015-10-23</h4>
					<p>
						<small><a href="http://github.com/danielkraic" target="_blank">github.com/danielkraic</a></small>
						<br>
						<small><a href="http://blog.dkraic.com" target="_blank">blog.dkraic.com</a></small>
					</p>
				</section>

				<section>
					<section>
				    <img src="http://www.ansible.com/hs-fs/hub/330046/file-769078185-png/Official_Logos/ansible_wordlogo_black_medium.png?t=1445360239370" alt="">
						<p>Simple. Agentless. Powerful.</p>
					</section>

					<section>
						<h2>Ansible</h2>
						<ul>
							<li>configuring and managing computers</li>
							<li>multi-node software deployment</li>
							<li>ad hoc task execution</li>
							<li>configuration management</li>
						</ul>
					</section>

					<section>
						<h2>In fact, it’s parallel ssh<br>...but done in smart way</h2>
					</section>

					<section>
						<ul>
							<li>agentless</li>
							<li>connect to nodes over SSH</li>
							<li>written in Python</li>
							<li><code>pip install ansible</code></li>
							<li>requires Python (2.4 or later) to be installed on node</li>
						</ul>
					</section>

					<section>
						 <h3 style='text-transform: lowercase;'>ansible host1 -m shell -a 'uname -a'</h3>
						 <small style='text-transform: lowercase;'>ansible -i inventory_file host_selection -m module -a params</small>
					</section>

					<section>
						<h2>Inventory file</h2>
<pre><code class="ini" data-trim>
[webservers]
www[01:50].example.com

[databases]
db-[a:f].example.com

[targets]
localhost ansible_connection=local
host1.com ansible_connection=ssh ansible_ssh_user=<user1></user1>
host2.com ansible_connection=ssh ansible_ssh_user=user2
</code></pre>
					</section>

					<section>
						<h2>Modules</h2>
						<ul>
						<li>command, shell, script</li>
						<li>copy, fetch, replace, stat, ini_file, template</li>
						<li>apt, apt_key, apt_repository, composer, bower, npm, pip, cpanm, maven</li>
						<li>service, authorized_keys, sysctl, cron, user, group, hostname, lvg, lvol, modprobe, mount</li>
						<li>haproxy, get_url, ...</li>
						</ul>
					</section>

					<section>
						<h2>Examples</h2>
					</section>

					<section>
						<pre><code class="bash" data-trim>
# run custom command
ansible h1 -a "echo hello"

# run as sudo, other user, ask for sudo pass
ansible h1 -a "uname" -u username --sudo [--ask-sudo-pass]

# manage httpd service
ansible h1 -m service -a "name=httpd state=started"

# manage apt packages
ansible h1 -m apt -a "name=foo update_cache=yes state=latest"

# manage apt repository
ansible h1 -m apt_repository -a "repo='ppa:nginx/stable'"
						</code></pre>
					</section>

					<section>
						<pre><code class="bash" data-trim>
# create files
ansible h1 -m file  -a "dest=/tmp/f1 mode=600 owner=usr1"

# copy file
ansible h1 -m copy  -a "src=/etc/hosts dest=/etc/hosts"

# fetch file
ansible h1 -m fetch -a "src=/tmp/somefile dest=/tmp/fetched"

# manage ini file
ansible h1 -m ini_file -a "dest=f.ini section=S option=V value=1"
						</code></pre>
					</section>

					<section>
						<h1>Playbook</h1>
						<ul>
							<li>group of task in yaml file</li>
							<li>variables, handlers, includes, "host type conditions", roles</li>
							<li>failed_when, ignore_errors, notify, delegate_to</li>
							<li>reusable roles at <a href="https://galaxy.ansible.com/" target="_blank">galaxy.ansible.com</a></li>
						</ul>
					</section>

					<section>
						<h3>Usage</h3>
						<pre><code  class="bash" data-trim>
# run playbook
ansible-playbook playbook.yml

# run playbook using a parallelism level of 10
ansible-playbook playbook.yml -f 10

# list hosts that will be afected
ansible-playbook playbook.yml --list-hosts
						</code></pre>
					</section>

					<section>
<pre><code  class="yaml" data-trim>
---
- hosts: webservers
  vars:
    http_port: 80
  tasks:
  - name: ensure apache is at the latest version
    yum: pkg=httpd state=latest
  - name: write the apache config file
    template: src=/srv/httpd.j2 dest=/etc/httpd.conf
    notify:
    - restart apache
  - name: ensure apache is running (and enable it at boot)
    service: name=httpd state=started enabled=yes
  handlers:
    - name: restart apache
      service: name=httpd state=restarted
</code></pre>
					</section>

					<section>
						<a href="http://www.ansible.com/" target="_blank">ansible.com</a>
						<br>
						<a href="https://github.com/ansible/ansible" target="_blank">github.com/ansible/ansible</a>
						<br>
						<a href="http://blog.dkraic.com/post/ansible/">blog.dkraic.com/post/ansible</a>
					</section>
				</section>

				<section>
					<section>
						<!--<img style="background: white" src="https://muffinresearch.co.uk/content/images/2014/Aug/large_h-trans.png" alt="Docker" />-->
						<img style="background: white" src="https://upload.wikimedia.org/wikipedia/commons/7/79/Docker_%28container_engine%29_logo.png" alt="Docker" />
						<p>Build &rarr; Ship &rarr; Run</p>
					</section>

					<section>
						<h2>Docker</h2>
						<ul>
							<li>package app with all dependencies into a container</li>
							<li>build once - run everywhere (developers)</li>
							<li>configure once - run anything (sys admins)</li>
							<li>run on any computer, any infrastructure and any cloud</li>
						</ul>
					</section>

					<section>
						<h2>Docker container</h2>
						<ul>
							<li>application</li>
							<li>runtime</li>
							<li>libraries</li>
							<li>system tools</li>
							<li>complete filesystem</li>
						</ul>
					</section>

					<section>
						<h2>Container vs VM</h2>
						<img style="background: white" src="http://pointful.github.io/docker-intro/docker-img/containers-vs-vms.png" alt="" />
					</section>

					<section>
						<h2>Docker container</h2>
						<ul>
							<li>share linux kernel with other containers</li>
							<li>run as an isolated process in userspace on the host operating system</li>
							<li>uses resource isolation features of the Linux kernel - cgroups and kernel namespaces</li>
						</ul>
					</section>

					<section>
						<h2>Build &rarr; Ship &rarr; Run</h2>
						<ul>
							<li><strong>Build</strong> – build docker container application and all of its dependencies</li>
							<li><strong>Ship</strong> – push container to public/private docker repository</li>
							<li><strong>Run</strong> – pull container from repository a run it</li>
						</ul>
					</section>

					<section>
						<h2>Examples</h2>
					</section>

					<section>
						<h2>Create + Start</h2>
						<pre><code class="bash" data-trim>
docker create -i -t --name my_debian debian:jessie bash
						</code></pre>
						<ul>
							<li><strong>-i</strong> interactive mode (keeps the STDIN open)</li>
							<li><strong>-t</strong> allocates a pseudo-TTY</li>
							<li><strong>–name</strong> name of the container (or generate hash string)</li>
							<li><strong>debian:jessie</strong> image to be instantiated.</li>
							<li><strong>bash</strong> command to run inside container</li>
						</ul>
						<pre><code class="bash" data-trim>
docker start -a -i my_debian
						</code></pre>
						<ul>
							<li><strong>-a</strong> attach to the pseudo-TTY</li>
						</ul>
					</section>

					<section>
						<h2>Create + Start = Run</h2>
						<pre><code class="bash" data-trim>
docker run hello-world
docker run docker/whalesay cowsay 'hello form docker'
						</code></pre>
					</section>

					<section>
						<h3>Run interactive</h3>
						<pre><code class="bash" data-trim>
docker run -i -t --name my_debian debian:jessie /bin/bash
						</code></pre>

						<h3>Run as deamon</h3>
						<pre><code class="bash" data-trim>
docker run -d --name MySQL mysql:5.7 /opt/mysql/mysqld
						</code></pre>
					</section>

					<section>
						<h3>Expose ports</h3>
						<pre><code class="bash" data-trim>
docker run -d -p 8080:80 --name web nginx
						</code></pre>

						<p>Expose all container ports to host</p>
						<pre><code class="bash" data-trim>
docker run -d -P --name web nginx
						</code></pre>
					</section>

					<section>
						<h3>Attach data</h3>
						<pre><code class="bash" data-trim>
docker run --name web -p 80:80 -d \
		-v /var/www:/usr/share/nginx/html:ro nginx
						</code></pre>
						<h3>Set ENV</h3>
						<pre><code class="bash" data-trim>
docker run -i -t -e VAR1=val1 -e VAR2=val2 debian:jessie bash
						</code></pre>
						<h3>Exec</h3>
						<pre><code class="bash" data-trim>
docker exec -i -t my_debian bash
						</code></pre>
					</section>

					<section>
						<h2>Demo: web server</h2>
						<pre><code class="bash" data-trim>
echo 'hello from docker' > index.html
docker run -p 8080:80 \
 -v `pwd`:/usr/share/nginx/html:ro -d nginx
# go to http://localhost:8080
						</code></pre>
					</section>

					<section>
						<h2>Control container</h2>
						<pre><code class="bash" data-trim>
docker ps
docker ps -a
docker ps -a --filter 'exited=0'
docker stop my_debian
docker kill my_debian
docker rm my_debian
						</code></pre>
					</section>

					<section>
						<h2>Control images</h2>
						<pre><code class="bash" data-trim>
docker search nginx
docker pull nginx
docker pull debian:squeeze
docker pull 172.16.0.1/username/image_name[:tag]
docker images
docker rmi -f nginx
						</code></pre>
					</section>

					<section>
						<h2>Link containers</h2>
						<pre><code class="bash" data-trim>
docker run --name DB \
		-e MYSQL_ROOT_PASSWORD=admin \
		-e MYSQL_DATABASE=admin \
		-d mysql:5.7
docker run -p 8080:80 \
		-e WORDPRESS_DB_PASSWORD=admin \
		--name WP --link DB:mysql \
		-d wordpress
# go to http://localhost:8080
						</code></pre>
					</section>

					<section>
						<h2>Docker Compose</h2>
						<p>tool for defining and running multi-container applications
						<ul>
							<li>define Dockerfile</li>
							<li>define services in <code>docker-compose.yml</code></li>
							<li>run <code>docker-compose up</code></li>
						</ul>
					</section>

					<section>
						<h2>Docker Hub</h2>
						<p><a href="https://hub.docker.com/" target="_blank">hub.docker.com</a></p>
					</section>

					<section>
						<h2>Dockerfile</h2>
						<p>instructions to build docker images</p>
						<pre><code class="bash" data-trim>
docker build -t dkraic/myapp .
						</code></pre>
					</section>

					<section>
						<pre><code class="dockerfile" data-trim>
FROM ubuntu:14.04

# install ansible
RUN apt-get update && apt-get install -y ansible

# add localhost to ansible hosts
RUN echo 'localhost ansible_connection=local' > /etc/ansible/hosts

# get ansible playbooks
COPY my-playbooks/ /etc/ansible/playbooks/

# run ansible playbook
RUN ansible-playbook /etc/ansible/playbooks/server-install.yaml
							</code></pre>
					</section>

					<section>
						<h2>Container lifecycle</h2>
						<ul>
							<li>docker create</li>
							<li>docker run</li>
							<li>docker stop</li>
							<li>docker start</li>
							<li>docker restart</li>
							<li>docker rm</li>
							<li>docker kill</li>
							<li>docker attach</li>
							<li>docker wait</li>
						</ul>
					</section>

					<section>
    				<h2>Container info</h2>
						<ul>
							<li>docker ps</li>
							<li>docker logs</li>
							<li>docker inspect</li>
							<li>docker port</li>
							<li>docker top</li>
						</ul>
					</section>

					<section>
    				<h2>Images</h2>
						<ul>
							<li>docker images</li>
							<li>docker build</li>
							<li>docker commit</li>
							<li>docker rmi</li>
							<li>docker login</li>
							<li>docker search</li>
							<li>docker pull</li>
							<li>docker push</li>
						</ul>
					</section>

					<section>
						<a href="https://docs.docker.com/" target="_blank">docs.docker.com</a>
						<br>
						<a href="https://hub.docker.com/" target="_blank">hub.docker.com</a>
						<br>
						<a href="http://blog.dkraic.com/post/docker/">blog.dkraic.com/post/docker</a>
					</section>

				</section>

				<section>
					<p>slides:<br>
						<a href="https://github.com/danielkraic/slides-docker-ansible">github.com/danielkraic/slides-docker-ansible</a>
					</p>
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