Class: Pfab::CLI

Inherits:
Object
  • Object
show all
Includes:
Commander::Methods
Defined in:
lib/pfab/cli.rb

Instance Method Summary collapse

Instance Method Details

#apps ⇒ Object 



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# File 'lib/pfab/cli.rb', line 240

def apps
  @_apps ||= calculate_apps
end

#calculate_apps ⇒ Object 



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# File 'lib/pfab/cli.rb', line 244

def calculate_apps
  application = @application_yaml["name"]
  apps = {}
  @application_yaml["deployables"].each do |deployable, dep|
    deployable_type = dep["type"]
    app_name = [application, deployable_type, deployable].join("-")
    apps[app_name] = {
      application: application,
      deployable: deployable,
      deployable_type: deployable_type,
      command: dep["command"],
    }
  end
  apps
end

#cmd_apply ⇒ Object 



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# File 'lib/pfab/cli.rb', line 141

def cmd_apply
  set_kube_context
  get_apps.each do |app_name|
    puts_and_system("kubectl apply -f .application-k8s-#{$env}-#{app_name}.yaml")
    puts_and_system("git tag release-#{$env}-#{app_name}-#{Time.now.strftime("%Y-%m-%d-%H-%M-%S")} HEAD")
  end
end

#cmd_build(force: false) ⇒ Object 



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# File 'lib/pfab/cli.rb', line 149

def cmd_build(force: false)
  rev = get_current_sha
  say "This repo is at rev: #{rev}"
  uncommitted_changes = `git diff-index HEAD --`.empty?
  if uncommitted_changes
    say "FYI! There are uncommitted changes."
    continue = agree("Continue anyway?")
    if continue
      say "carrying on and pushing local code to #{rev}"
    else
      return false
    end
  end

  full_image_name = "#{container_repository}/#{image_name}:#{rev}"

  cmd = "docker images -q #{full_image_name}"
  say "Looking for images with #{cmd}"
  existing = `#{cmd}`

  if !existing.to_s.empty? && !force
    say "Found image #{full_image_name} already, skipping prebuild, build & push"
    return true
  end

  say "No image #{full_image_name} present, building"

  prebuild = @application_yaml["prebuild"] || ""
  if prebuild.empty?
    say "No prebuild task"
  else
    say "Prebuild, running system(#{prebuild})"
    result = system(prebuild)
    if result
      say 'Pfab prebuild success'
    else
      say "Pfab prebuild did not return success. Exiting"
      return false
    end
  end

  puts_and_system "docker build -t #{image_name} ."

  puts_and_system "docker tag #{image_name}:latest #{image_name}:#{rev}"
  puts_and_system "docker tag #{image_name}:#{rev} #{full_image_name}"

  puts_and_system "docker push #{container_repository}/#{image_name}:#{rev}"
  return true
end

#cmd_generate_yaml ⇒ Object 



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# File 'lib/pfab/cli.rb', line 199

def cmd_generate_yaml
  wrote = Pfab::Yamls.generate_for(apps: @apps,
                                   application_yaml: @application_yaml,
                                   env: $env,
                                   sha: get_current_sha,
                                   image_name: image_name,
                                   config: config
  )
  puts "Generated #{wrote}"
end

#config ⇒ Object 



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# File 'lib/pfab/cli.rb', line 227

def config
  @_config ||= YAML.load(File.read(File.join(Dir.home, ".pfab.yaml")))
end

#container_repository ⇒ Object 



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# File 'lib/pfab/cli.rb', line 223

def container_repository
  @_container_repository ||= config["container.repository"]
end

#get_app_name(all: false) ⇒ Object 



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# File 'lib/pfab/cli.rb', line 274

def get_app_name(all: false)
  return $app_name unless $app_name.nil?
  apps = @apps.keys
  apps << "all" if all
  $app_name = choose("which app?", *apps)
end

#get_apps ⇒ Object 



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# File 'lib/pfab/cli.rb', line 281

def get_apps
  name = get_app_name(all: true)
  (name == "all") ? @apps.keys : [name]
end

#get_current_sha ⇒ Object 



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# File 'lib/pfab/cli.rb', line 210

def get_current_sha
  `git rev-parse --short --verify HEAD`.chomp
end

#get_first_pod(app) ⇒ Object 



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# File 'lib/pfab/cli.rb', line 260

def get_first_pod(app)
  if get_pods(app)["items"].empty?
    raise "There are no running pods for #{app}"
  end
  get_pods(app)["items"][0]["metadata"]["name"]
end

#get_pods(app) ⇒ Object 



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# File 'lib/pfab/cli.rb', line 267

def get_pods(app)
  get_pods_str = "kubectl get pods -o json -l deployed-name=#{app}"
  puts get_pods_str
  pods_str = `#{get_pods_str}`
  JSON.parse(pods_str)
end

#image_name ⇒ Object 



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# File 'lib/pfab/cli.rb', line 219

def image_name
  @application_yaml["name"]
end

#puts_and_system(cmd) ⇒ Object 



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# File 'lib/pfab/cli.rb', line 231

def puts_and_system cmd
  puts cmd
  if $dryrun
    puts "dry run, didn't run that"
  else
    system cmd
  end
end

#run ⇒ Object 



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# File 'lib/pfab/cli.rb', line 11

def run
  program :name, "pfab"
  program :version, "0.0.0"
  program :description, "k8s helper"

  if File.exist? "application.yaml"
    @application_yaml = YAML.load(File.read("application.yaml")).with_indifferent_access
  else
    raise "I need to be run in a directory with a application.yaml"
  end
  global_option("--verbose") { $verbose = true }
  $dryrun = false
  global_option("--dryrun") { $dryrun = true }
  $env = :staging
  global_option("-p") { $env = :production }
  global_option("-a", "--application_name APP_NAME", "run without prompting for app") do |app_name|
    $app_name = app_name
  end

  @apps = apps

  command :build do |c|
    c.syntax = "pfab build"
    c.summary = "build image"
    c.option "--force", "force build and push"
    c.action do |_args, options|
      cmd_build(force: options.force)
    end
  end

  command :generate_yaml do |c|
    c.syntax = "pfab generate_yaml"
    c.summary = "build k8s yaml"
    c.action do
      cmd_generate_yaml
    end
  end
  command :apply do |c|
    c.syntax = "pfab apply"
    c.summary = "kubectl apply"
    c.action do
      cmd_apply
    end
  end

  command :shipit do |c|
    c.syntax = "pfab shipit"
    c.summary = "build, generate, apply"
    c.action do
      app_name = get_app_name(all: true)
      puts "Shipping #{app_name}"
      success = cmd_build
      if success
        cmd_generate_yaml
        cmd_apply
      end
    end
  end

  command :logs do |c|
    c.syntax = "pfab logs"
    c.summary = "tail logs"
    c.description = "show me my logs`"
    c.example "tail logs of the first pod in staging",
              "pfab logs"
    c.example "tail logs of the first pod in production",
              "pfab -p logs"
    c.action do
      set_kube_context
      app_name = get_app_name

      first_pod = get_first_pod(app_name)

      puts_and_system("kubectl logs -f #{first_pod}")
    end
  end

  command :exec do |c|
    c.syntax = "pfab exec"
    c.summary = "kubectl exec into a  pod"
    c.description = "CLI to the Cloud"
    c.example "exec into the first pod in staging",
              "pfab exec"
    c.example "exec into the first pod in production",
              "ezp -p exec"
    c.action do
      set_kube_context
      app_name = get_app_name

      first_pod = get_first_pod app_name

      puts_and_system "kubectl exec -it #{first_pod} -- /bin/bash"
    end
  end

  command :status do |c|
    c.syntax = "pfab status"
    c.summary = "status of an app"
    c.description = "what's happening"
    c.example "what's happening in my app?",
              "pfab status"
    c.example "what's happening in production",
              "pfab status -p status"
    c.example "pick a single app",
              "pfab status --pick "
    c.example "verbose mode",
              "pfab status --verbose "
    c.example "watch deploy",
              "pfab status --watch "
    c.option "--watch", "Watch"
    c.action do |_args, options|
      set_kube_context

      selector = "application=#{@application_yaml['name']}"

      if options.watch
        puts_and_system "kubectl get pods -l #{selector} -w"
      elsif $verbose
        puts_and_system "kubectl describe pods -l #{selector}"
      else
        puts_and_system "kubectl get ingresses,jobs,services,cronjobs,deployments,pods --include-uninitialized=true -l #{selector}"
      end
    end
  end

  default_command :help

  run!
end

#set_kube_context ⇒ Object 



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# File 'lib/pfab/cli.rb', line 214

def set_kube_context
  str = "kubectl config use-context #{config["envs"][$env.to_s]["context"]}"
  puts_and_system str
end