Class: Pfab::CLI

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

Instance Method Summary collapse

Instance Method Details

#all_runnables ⇒ Object 



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# File 'lib/pfab/cli.rb', line 413

def all_runnables
  deployables.merge(run_locals)
end

#build_args ⇒ Object 



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# File 'lib/pfab/cli.rb', line 374

def build_args
  args = @application_yaml["build_args"] || []
  if args.any?
    return args.map{|a| "--build-arg #{a}=$#{a}"}.join(" ")
  end
  ""
end

#calculate_runnables(runnable_type) ⇒ Object 



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# File 'lib/pfab/cli.rb', line 417

def calculate_runnables(runnable_type)
  application = @application_yaml["name"]
  apps = {}
  (@application_yaml[runnable_type] || []).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(timeout: 240, retries: 3, sleep_duration: 5) ⇒ Object 



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# File 'lib/pfab/cli.rb', line 212

def cmd_apply(timeout: 240, retries: 3, sleep_duration: 5)
  set_kube_context
  success = true

  get_apps.each do |app_name|
    app = deployables[app_name]
    if app[:deployable_type] == "cron"
      deployed_name = deployed_name(app)
      success &= kubectl("delete cronjob -l deployed-name=#{deployed_name}")
    end
    success &= kubectl("apply -f .application-k8s-#{$env}-#{app_name}.yaml")
    success &= puts_and_system("git tag release-#{$env}-#{app_name}-#{Time.now.strftime("%Y-%m-%d-%H-%M-%S")} HEAD")
    success &= puts_and_system("git push origin --tags")
  end

  success &= wait_for_deployments_rollout(timeout, retries: retries, sleep_duration: sleep_duration)

  exit(success ? 0 : 1)
end

#cmd_build(force: false, checkonly: false) ⇒ Object 



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# File 'lib/pfab/cli.rb', line 280

def cmd_build(force: false, checkonly: 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}"

  unless force
    if image_exists?(full_image_name)
      say "Found image #{full_image_name} already, skipping prebuild, build & push"
      return true
    else
      say "No image #{full_image_name} present"
    end
    return if checkonly
  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

  build_cmd = "docker buildx build -t #{image_name} --platform linux/amd64 #{build_args} ."
  puts build_cmd
  result = system(build_cmd)

  puts "Build Result #{result}"

  if result
    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
  else
    say "Build Did Not Succeed"
    return false
  end

end

#cmd_generate_yaml ⇒ Object 



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# File 'lib/pfab/cli.rb', line 352

def cmd_generate_yaml
  wrote = yy.generate(deployables.keys)
  puts "Generated #{wrote}"
end

#config ⇒ Object 



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# File 'lib/pfab/cli.rb', line 386

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 382

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

#deployables ⇒ Object 



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# File 'lib/pfab/cli.rb', line 405

def deployables
  @_deployables ||= calculate_runnables("deployables")
end

#deployed_name(app) ⇒ Object 



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# File 'lib/pfab/cli.rb', line 357

def deployed_name(app)
  [app[:application], app[:deployable_type], app[:deployable]].join("-")
end

#get_app_name(all: false, include_run_locals: false) ⇒ Object 



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# File 'lib/pfab/cli.rb', line 446

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

#get_apps ⇒ Object 



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# File 'lib/pfab/cli.rb', line 454

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

#get_current_sha ⇒ Object 



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# File 'lib/pfab/cli.rb', line 361

def get_current_sha
  `git rev-parse --short=8 --verify HEAD`.chomp
end

#get_first_pod(app) ⇒ Object 



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# File 'lib/pfab/cli.rb', line 433

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 440

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

#image_exists?(full_image_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pfab/cli.rb', line 271

def image_exists?(full_image_name)

  # return 0 if image exists 1 if not
  cmd = "docker manifest inspect #{full_image_name} > /dev/null ; echo $?"
  say "Looking for images with #{cmd}"
  existing = `#{cmd}`.strip
  existing == "0"
end

#image_name ⇒ Object 



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# File 'lib/pfab/cli.rb', line 370

def image_name
  @application_yaml["name"]
end

#kubectl(cmd, post_cmd = "") ⇒ Object 



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# File 'lib/pfab/cli.rb', line 390

def kubectl(cmd, post_cmd = "")
  result = puts_and_system("kubectl #{cmd} --namespace=#{yy.namespace} #{post_cmd}")
  result == true
end

#puts_and_system(cmd) ⇒ Object 



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# File 'lib/pfab/cli.rb', line 395

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

#run ⇒ Object 



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# File 'lib/pfab/cli.rb', line 13

def run
  program :name, "pfab"
  program :version, Pfab::Version::STRING
  program :description, "k8s helper"

  if File.exist? "application.yaml"
    @application_yaml = YAML.load(File.read("application.yaml")).with_indifferent_access
    @application_yaml_hash = Digest::SHA256.hexdigest(@application_yaml.to_json)
  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") do
    puts "please use `-e production` next time!"
    $env = :production
  end
  global_option("-e", "--environment ENV", "specify target env") do |env_name|
    puts "Using environment #{env_name}"
    $env = env_name
  end
  global_option("-a", "--application_name APP_NAME", "run without prompting for app") do |app_name|
    $app_name = app_name
  end

  command :build do |c|
    c.syntax = "pfab build"
    c.summary = "build image"
    c.option "--force", "force build and push"
    c.option "--check", "just check if built"
    c.action do |_args, options|
      cmd_build(force: options.force, checkonly: options.check)
    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.option "-t", "--timeout TIMEOUT", Integer, "timeout for rollout (default 360s)"
    c.option "-r", "--retries RETRIES", Integer, "number of retries for rollout (default 3)"
    c.option "-s", "--sleep SLEEP", Integer, "sleep duration between retries in seconds (default 5)"

    c.action do |args, options|
      options.default timeout: 360, retries: 3, sleep: 5
      app_name = get_app_name(all: true)
      puts "Shipping #{app_name}"
      success = cmd_build
      if success
        cmd_generate_yaml
        cmd_apply(timeout: options.timeout, retries: options.retries, sleep_duration: options.sleep)
      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)

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

  command :restart do |c|
    c.syntax = "pfab restart"
    c.summary = "rolling restart of a deployment"
    c.description = "rolling restart of a deployment"
    c.action do
      set_kube_context
      app_name = get_app_name

      kubectl "rollout restart deployment.apps/#{app_name}"
    end
  end

  command :exec do |c|
    c.option "-c", "--command command", "use with exec to run a command and exit. default is /bin/sh"
    c.syntax = "pfab exec [-- command to execute]'"
    c.summary = "kubectl exec into a  pod"
    c.description = "CLI to the Cloud"
    c.example "exec into the first pod in staging",
              "pfab -e staging exec"
    c.example "exec into the first pod in production",
              "pfab -p exec"
    c.action do |args, options|
      set_kube_context
      # Access the command line input after "--"
      additional_args = ARGV[ARGV.index('--') + 1..-1] if ARGV.include?('--')
      app_name = get_app_name
      first_pod = get_first_pod app_name
      kubectl "exec -it #{first_pod}", "-- #{additional_args ? additional_args.join(' ') : (options.command || '/bin/sh')}"
    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
        kubectl "get pods -l #{selector} -w"
      elsif $verbose
        kubectl "describe pods -l #{selector}"
      else
        kubectl "get ingresses,jobs,services,cronjobs,deployments,pods -l #{selector}"
      end
    end
  end

  command :run_local do |c|
    c.syntax = "pfab run_local"
    c.summary = "run an app LOCALLY"
    c.description = "run the application command with all env vars set"
    c.example "run a command locally",
              "pfab run_local"
    c.option "-c", "--command COMMAND", "Run a command with the ENV vars of the selected app"
    c.action do |_args, options|
      $env = :development
      app_name = get_app_name(include_run_locals: true)
      puts "RUNNING THE FOLLOWING LOCALLY"

      env_vars = yy.env_vars(app_name).
        reject { |v| v.has_key? :valueFrom }

      env_var_string = env_vars.map { |item| "#{item[:name]}=\"#{item[:value]}\"" }.join(" ")
      options.default command: all_runnables[app_name][:command]

      puts_and_system "#{env_var_string} #{options.command}"
    end
  end
  alias_command :rl, :run_local

  command :clean do |c|
    c.syntax = "pfab clean"
    c.summary = "clean up pods"
    c.description = "clean up old pods"
    c.example "clean up",
              "pfab clean"
    c.action do |_args, options|
      set_kube_context
      puts "THIS APPLIES TO THE ENTIRE NAMESPACE"
      types = %w(Failed Pending Succeeded)
      types.each do |type|
        kubectl("get pods --field-selector status.phase=#{type}")
        if agree("Delete those?")
          kubectl("delete pods --field-selector status.phase=#{type}")
          puts "Deleted"
        end
      end
    end
  end
  alias_command :rl, :run_local

  default_command :help

  run!
end

#run_locals ⇒ Object 



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# File 'lib/pfab/cli.rb', line 409

def run_locals
  @_rl ||= calculate_runnables("run_locals")
end

#set_kube_context ⇒ Object 



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# File 'lib/pfab/cli.rb', line 365

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

#wait_for_deployments_rollout(timeout, retries: 3, sleep_duration: 5) ⇒ Object 



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# File 'lib/pfab/cli.rb', line 232

def wait_for_deployments_rollout(timeout, retries: 3, sleep_duration: 5)
  selector = "application=#{@application_yaml['name']}"
  deployment_json = `kubectl get deployment -l #{selector} -o json --namespace=#{yy.namespace}`
  deployments = JSON.parse(deployment_json)
  
  if deployments["items"].any?
    deployments["items"].each do |deployment|
      deployment_name = deployment["metadata"]["name"]
      puts "Waiting for deployment #{deployment_name} to roll out..."

      rollout_success = false
      
      retries.times do |attempt|
        rollout_success = kubectl("rollout status deployment/#{deployment_name} --timeout=#{timeout}s")
        if rollout_success
          puts "Deployment #{deployment_name} successfully rolled out. Attempt #{attempt + 1}/#{retries}."
          break
        else
          puts "Attempt #{attempt + 1}/#{retries}: Deployment #{deployment_name} failed to roll out within the specified timeout."
          if attempt < retries - 1
            puts "Retrying in #{sleep_duration} seconds..."
            sleep(sleep_duration)
          end
        end
      end
      
      unless rollout_success
        puts "Deployment #{deployment_name} failed to roll out after #{retries} attempts."
        return false
      end
    end
    puts "All deployments successfully rolled out."
    true
  else
    puts "No deployments found for selector: #{selector}"
    false
  end
end

#yy ⇒ Object 



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# File 'lib/pfab/cli.rb', line 341

def yy
  Pfab::Yamls.new(apps: all_runnables,
                  application_yaml: @application_yaml,
                  application_yaml_hash: @application_yaml_hash,
                  env: $env,
                  sha: get_current_sha,
                  image_name: image_name,
                  config: config
  )
end