Ansible - Why and what
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The document summarizes an Ansible meetup in Hyderabad on August 22nd, 2015. It discusses how Ansible can be used to automate infrastructure provisioning and application deployments, helping to reduce pains associated with manual processes. It provides examples of using Ansible modules, playbooks, roles and other features to configure servers, deploy software, orchestrate clusters and more without needing to log into servers. The meetup covered how Ansible can help with DevOps practices like continuous delivery and managing infrastructure as code.
Ansible - Why and what
- 1. Ansible Hyderabad Meetup August 22nd, 2015 Maruti Gollapudi
- 2. Understand Why and What of Ansible Get started with Some Samples Lets Start feeling some pain -> DevOps Infrastructure As Code Continuous Delivery
- 3. An App server, DB and few more Developer codes, tests and done!! Request Ops team to prepare Infrastructure and deploy Pains: ◦ Takes time!! ◦ Prepare some kind of manual for Ops team – Any mistake will introduce additional pain. ◦ Version update - almost same pain ◦ Scheduled deployments – Monthly?? Or even less frequent. A simple pain !!! Develop Test Deploy Maintain X
- 4. App server cluster, DB Cluster, Compute cluster etc Scale up and down Create a Apache Mesos cluster Add a node to Mongo DB replica set Provision 1000 nodes on Open stack cloud. Install Hadoop on 100 nodes, Jboss on 10 noodes, MySQL on 5 nodes, Mongo DB on 20 nodes Pains: ◦ Aren’t you feeling already!! More pain !!! Big Data , IoT …
- 5. Can’t wait one month for a new feature – need more deployments Test everything – including infrastructure, so code everything. IoT – communicate with devices. Deploy docker containers on them?? Some More pain !!! The Pain Relief!! ->
- 6. Automate everything an Ops guy can do! And do it without even SSHing with No need to log in to the servers No need to manually install packages No need to manually edit configuration files No need to manually restart daemons No need to use admin console to create VMs Launch VMs Launch Containers Provision/Configure Deploy Software Start/Stop services Launch a Mesos cluster Add/Delete nodes from Cluster
- 7. Powered by SSH. Can use 0mq also. Agent less Vibrant community with lot of re usable code App Deployment + Configuration Management + Orchestration Any Device that can be SSHed!!
- 9. Inventory {1000 nodes Hadoop cluster.. One inventory file!!}
- 10. Adhoc commands {lets see Ansible in action now!!} $ ansible all -m ping $ ansible all -m setup $ ansible web-group -m ping $ ansible all -a "/sbin/reboot" -f 10
- 11. Modules {don’t know python, do it in bash!!} ◦ http://docs.ansible.com/ansible/modules.html apt, apt_repository, assemble, async_status, authorized_key, command, copy, cron, debug, easy_install, facter, fail, fetch, file, fireball, get_url, git, group, ini_file, lineinfile, mail, mount, mysql_db, mysql_user, nagios, ohai, pause, ping, pip, postgresql_db, postgresql_user, raw, seboolean, selinux, service, setup, shell, slurp, subversion, supervisorctl, template, user, virt, yum $ ansible all -m user -a "name=joe password=wat“ $ ansible all -m yum -a "name=nginx state=installed“ $ ansible all -m service -a "name=nginx state=started"
- 12. Playbook {its not as big as a book though and lets see one!!} Playbooks are Ansible’s configuration, deployment, and orchestration language Playbooks are expressed in YAML format The goal of a play is to map a group of hosts to some well defined roles, represented by things ansible calls tasks --- - hosts: webservers user: root vars: http_port: 80 max_clients: 200 tasks: - name: ensure apache is at the latest version action: yum pkg=httpd state=latest - name: write the apache config file action: template src=httpd.j2 dest=/etc/httpd.conf notify: - restart apache - name: ensure apache is running action: service name=httpd state=started handlers: - name: restart apache action: service name=httpd state=restarted
- 13. Roles {re-usable components} Galaxy {may be you cant count them but can use them!!} ◦ https://galaxy.ansible.com/ Ansible Tower {Need Money!!!} templets Callbacks (Python) Action plugins (Python) Inventory sources (any language)
- 14. Twitter ◦ https://www.youtube.com/watch?v=fwGrKXzocg4 Hootsuite ◦ www.ansible.com/blog/ansible-app-deployment-hootsuite ◦ http://code.hootsuite.com/automating-our-scala-deploys-with-ansible-case-study/ NASA ◦ http://www.ansible.com/blog/nasa-automation Raun ◦ http://www.ansible.com/hs-fs/hub/330046/file-2130647754- pdf/Whitepapers__Case_Studies/ruan_case_study_(1).pdf Lifesum ◦ http://www.ansible.com/hs-fs/hub/330046/file-2126676653- pdf/Whitepapers__Case_Studies/lifesum_case_study.pdf Narrative Clip ◦ http://cdn2.hubspot.net/hub/330046/file-508495323- pdf/pdf_content/Narrative_Case_Study_AWS.pdf
- 15. https://docs.ansible.com/ https://www.openstack.org/summit/openstack-summit-atlanta- 2014/session-videos/presentation/taming-openstack-with-ansible https://www.openstack.org/news/view/61/ansible-announces-the- simple-openstack-initiative https://www.openstack.org/summit/vancouver-2015/summit- videos/presentation/deploying-openstack-with-ansible
- 16. Thank You Maruti Gollapudi Principal Architect @IGATE @gmaruti github.com/gmaruti https://www.linkedin.com/in/marutigollapudi Blogofmaruti.blogspot.com