Growing Pains: Avoiding Module Hell
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The document discusses best practices for managing infrastructure as code, focusing on configuration management using tools like Puppet. It emphasizes the importance of semantic versioning and careful specification of modules to avoid complications, referred to as 'module hell.' Additionally, it outlines examples of various configurations and parameters for managing system services, firewall settings, and monitoring tools.
Growing Pains: Avoiding Module Hell
- 1. Growing Pains: Avoiding Module Hell Chad Metcalf @metcalfc Saturday, August 24, 13
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- 5. As do many stories, it all begins with ... Saturday, August 24, 13
- 6. $ sudo Saturday, August 24, 13
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- 9. sudo::conf { 'web': source => 'puppet:///files/etc/sudoers.d/web', } sudo::conf { 'admins': priority => 10, content => "%admins ALL=(ALL) NOPASSWD: ALLn", } sudo::conf { 'joe': priority => 60, source => 'puppet:///files/etc/sudoers.d/users/joed', } Saturday, August 24, 13
- 10. sudo::rule { "extra_rule": ensure => present, who => 'bob', commands => "/usr/sbin/systemctl", nopass => false, comment => "what ever you like", } Saturday, August 24, 13
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- 12. Infrastructure as Code Module as an API Source Code Management Verification andValidation Release Management Saturday, August 24, 13
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- 26. MAJOR version when you make incompatible API changes 1.x.x Saturday, August 24, 13
- 27. MINOR version when you add functionality in a backwards- compatible manner x.0.x Saturday, August 24, 13
- 28. PATCH version when you make backwards-compatible bug fixes x.x.0 Saturday, August 24, 13
- 29. Its OK to go: 1.0. 0 Saturday, August 24, 13
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- 31. Easy to learn Easy to use Hard to misuse Easy to Saturday, August 24, 13
- 32. Gather requirements Use cases Don’t over specify Private as possible Saturday, August 24, 13
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- 40. Don’t Specify ALL THE THINGS!!! Saturday, August 24, 13
- 41. define apache::vhost ( $server_admin $server_name = '', $docroot = '', $docroot_create = false, $docroot_owner = 'root', $docroot_group = 'root', $port = '80', $ssl = false, $template = 'apache/virtualhost/vho $priority = '50', $serveraliases = '', $env_variables = '', $passenger = false, $passenger_high_performance = true, $passenger_max_pool_size = 12, $passenger_pool_idle_time = 1200, $passenger_max_requests = 0, $passenger_stat_throttle_rate = 30, $passenger_rack_auto_detect = true, $passenger_rails_auto_detect = false, $passenger_rails_env = '', Saturday, August 24, 13
- 43. "foobar-cluster": { "mapred-options": [ { "name": "mapred.map.output.compression.codec", "value": "org.apache.hadoop.io.compress.SnappyCode }, { "name": "mapred.compress.map.output", "value": "true" }, { "name": "io.sort.factor", "value": "64" }, { "name": "io.sort.record.percent", "value": "0.05" }, { "name": "mapred.map.tasks.speculative.execution", { "name": "mapred.reduce.tasks.speculative.execution Saturday, August 24, 13
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