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Split lock and connection setup

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Allow run the pre-connect hook before the first SSH command is executed,
but only run the locking in `with_lock` blocks.
This commit is contained in:
Donal McBreen
2024-05-20 15:03:38 +01:00
parent 83d0078525
commit 0e73f02743
11 changed files with 125 additions and 91 deletions
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22
lib/kamal/cli/accessory.rb
View File

@@ -1,7 +1,7 @@
class Kamal::Cli::Accessory < Kamal::Cli::Base
desc "boot [NAME]", "Boot new accessory service on host (use NAME=all to boot all accessories)"
def boot(name, login: true)
mutating do
with_lock do
if name == "all"
KAMAL.accessory_names.each { |accessory_name| boot(accessory_name) }
else
@@ -21,7 +21,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
desc "upload [NAME]", "Upload accessory files to host", hide: true
def upload(name)
mutating do
with_lock do
with_accessory(name) do |accessory, hosts|
on(hosts) do
accessory.files.each do |(local, remote)|
@@ -38,7 +38,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
desc "directories [NAME]", "Create accessory directories on host", hide: true
def directories(name)
mutating do
with_lock do
with_accessory(name) do |accessory, hosts|
on(hosts) do
accessory.directories.keys.each do |host_path|
@@ -51,7 +51,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
desc "reboot [NAME]", "Reboot existing accessory on host (stop container, remove container, start new container; use NAME=all to boot all accessories)"
def reboot(name)
mutating do
with_lock do
if name == "all"
KAMAL.accessory_names.each { |accessory_name| reboot(accessory_name) }
else
@@ -70,7 +70,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
desc "start [NAME]", "Start existing accessory container on host"
def start(name)
mutating do
with_lock do
with_accessory(name) do |accessory, hosts|
on(hosts) do
execute *KAMAL.auditor.record("Started #{name} accessory"), verbosity: :debug
@@ -82,7 +82,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
desc "stop [NAME]", "Stop existing accessory container on host"
def stop(name)
mutating do
with_lock do
with_accessory(name) do |accessory, hosts|
on(hosts) do
execute *KAMAL.auditor.record("Stopped #{name} accessory"), verbosity: :debug
@@ -94,7 +94,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
desc "restart [NAME]", "Restart existing accessory container on host"
def restart(name)
mutating do
with_lock do
with_accessory(name) do
stop(name)
start(name)
@@ -175,7 +175,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
option :confirmed, aliases: "-y", type: :boolean, default: false, desc: "Proceed without confirmation question"
def remove(name)
confirming "This will remove all containers, images and data directories for #{name}. Are you sure?" do
mutating do
with_lock do
if name == "all"
KAMAL.accessory_names.each { |accessory_name| remove_accessory(accessory_name) }
else
@@ -187,7 +187,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
desc "remove_container [NAME]", "Remove accessory container from host", hide: true
def remove_container(name)
mutating do
with_lock do
with_accessory(name) do |accessory, hosts|
on(hosts) do
execute *KAMAL.auditor.record("Remove #{name} accessory container"), verbosity: :debug
@@ -199,7 +199,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
desc "remove_image [NAME]", "Remove accessory image from host", hide: true
def remove_image(name)
mutating do
with_lock do
with_accessory(name) do |accessory, hosts|
on(hosts) do
execute *KAMAL.auditor.record("Removed #{name} accessory image"), verbosity: :debug
@@ -211,7 +211,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
desc "remove_service_directory [NAME]", "Remove accessory directory used for uploaded files and data directories from host", hide: true
def remove_service_directory(name)
mutating do
with_lock do
with_accessory(name) do |accessory, hosts|
on(hosts) do
execute *accessory.remove_service_directory

24
lib/kamal/cli/app.rb
View File

@@ -1,7 +1,7 @@
class Kamal::Cli::App < Kamal::Cli::Base
desc "boot", "Boot app on servers (or reboot app if already running)"
def boot
mutating do
with_lock do
say "Get most recent version available as an image...", :magenta unless options[:version]
using_version(version_or_latest) do |version|
say "Start container with version #{version} using a #{KAMAL.config.readiness_delay}s readiness delay (or reboot if already running)...", :magenta
@@ -33,7 +33,7 @@ class Kamal::Cli::App < Kamal::Cli::Base
desc "start", "Start existing app container on servers"
def start
mutating do
with_lock do
on(KAMAL.hosts) do |host|
roles = KAMAL.roles_on(host)
@@ -47,7 +47,7 @@ class Kamal::Cli::App < Kamal::Cli::Base
desc "stop", "Stop app container on servers"
def stop
mutating do
with_lock do
on(KAMAL.hosts) do |host|
roles = KAMAL.roles_on(host)
@@ -135,7 +135,7 @@ class Kamal::Cli::App < Kamal::Cli::Base
def stale_containers
stop = options[:stop]
mutating(mutates: stop) do
with_lock_if_stopping do
on(KAMAL.hosts) do |host|
roles = KAMAL.roles_on(host)
@@ -204,7 +204,7 @@ class Kamal::Cli::App < Kamal::Cli::Base
desc "remove", "Remove app containers and images from servers"
def remove
mutating do
with_lock do
stop
remove_containers
remove_images
@@ -213,7 +213,7 @@ class Kamal::Cli::App < Kamal::Cli::Base
desc "remove_container [VERSION]", "Remove app container with given version from servers", hide: true
def remove_container(version)
mutating do
with_lock do
on(KAMAL.hosts) do |host|
roles = KAMAL.roles_on(host)
@@ -227,7 +227,7 @@ class Kamal::Cli::App < Kamal::Cli::Base
desc "remove_containers", "Remove all app containers from servers", hide: true
def remove_containers
mutating do
with_lock do
on(KAMAL.hosts) do |host|
roles = KAMAL.roles_on(host)
@@ -241,7 +241,7 @@ class Kamal::Cli::App < Kamal::Cli::Base
desc "remove_images", "Remove all app images from servers", hide: true
def remove_images
mutating do
with_lock do
on(KAMAL.hosts) do
execute *KAMAL.auditor.record("Removed all app images"), verbosity: :debug
execute *KAMAL.app.remove_images
@@ -284,4 +284,12 @@ class Kamal::Cli::App < Kamal::Cli::Base
def version_or_latest
options[:version] || KAMAL.config.latest_tag
end
def with_lock_if_stopping
if options[:stop]
with_lock { yield }
else
yield
end
end
end

47
lib/kamal/cli/base.rb
View File

@@ -79,27 +79,27 @@ module Kamal::Cli
puts " Finished all in #{sprintf("%.1f seconds", runtime)}"
end
def mutating(mutates: true)
return yield if KAMAL.holding_lock? || !mutates
run_hook "pre-connect"
ensure_run_and_locks_directory
acquire_lock
begin
def with_lock
if KAMAL.holding_lock?
yield
rescue
begin
release_lock
rescue => e
say "Error releasing the deploy lock: #{e.message}", :red
end
raise
end
else
ensure_run_and_locks_directory
release_lock
acquire_lock
begin
yield
rescue
begin
release_lock
rescue => e
say "Error releasing the deploy lock: #{e.message}", :red
end
raise
end
release_lock
end
end
def confirming(question)
@@ -153,6 +153,15 @@ module Kamal::Cli
end
end
def on(*args, &block)
if !KAMAL.connected?
run_hook "pre-connect"
KAMAL.connected = true
end
super
end
def command
@kamal_command ||= begin
invocation_class, invocation_commands = *first_invocation

4
lib/kamal/cli/env.rb
View File

@@ -3,7 +3,7 @@ require "tempfile"
class Kamal::Cli::Env < Kamal::Cli::Base
desc "push", "Push the env file to the remote hosts"
def push
mutating do
with_lock do
on(KAMAL.hosts) do
execute *KAMAL.auditor.record("Pushed env files"), verbosity: :debug
@@ -30,7 +30,7 @@ class Kamal::Cli::Env < Kamal::Cli::Base
desc "delete", "Delete the env file from the remote hosts"
def delete
mutating do
with_lock do
on(KAMAL.hosts) do
execute *KAMAL.auditor.record("Deleted env files"), verbosity: :debug

48
lib/kamal/cli/main.rb
View File

@@ -3,7 +3,7 @@ class Kamal::Cli::Main < Kamal::Cli::Base
option :skip_push, aliases: "-P", type: :boolean, default: false, desc: "Skip image build and push"
def setup
print_runtime do
mutating do
with_lock do
invoke_options = deploy_options
say "Ensure Docker is installed...", :magenta
@@ -22,22 +22,22 @@ class Kamal::Cli::Main < Kamal::Cli::Base
option :skip_push, aliases: "-P", type: :boolean, default: false, desc: "Skip image build and push"
def deploy
runtime = print_runtime do
mutating do
invoke_options = deploy_options
invoke_options = deploy_options
say "Log into image registry...", :magenta
invoke "kamal:cli:registry:login", [], invoke_options
say "Log into image registry...", :magenta
invoke "kamal:cli:registry:login", [], invoke_options
if options[:skip_push]
say "Pull app image...", :magenta
invoke "kamal:cli:build:pull", [], invoke_options
else
say "Build and push app image...", :magenta
invoke "kamal:cli:build:deliver", [], invoke_options
end
if options[:skip_push]
say "Pull app image...", :magenta
invoke "kamal:cli:build:pull", [], invoke_options
else
say "Build and push app image...", :magenta
invoke "kamal:cli:build:deliver", [], invoke_options
end
run_hook "pre-deploy"
run_hook "pre-deploy"
with_lock do
say "Ensure Traefik is running...", :magenta
invoke "kamal:cli:traefik:boot", [], invoke_options
@@ -58,17 +58,17 @@ class Kamal::Cli::Main < Kamal::Cli::Base
option :skip_push, aliases: "-P", type: :boolean, default: false, desc: "Skip image build and push"
def redeploy
runtime = print_runtime do
mutating do
invoke_options = deploy_options
invoke_options = deploy_options
if options[:skip_push]
say "Pull app image...", :magenta
invoke "kamal:cli:build:pull", [], invoke_options
else
say "Build and push app image...", :magenta
invoke "kamal:cli:build:deliver", [], invoke_options
end
if options[:skip_push]
say "Pull app image...", :magenta
invoke "kamal:cli:build:pull", [], invoke_options
else
say "Build and push app image...", :magenta
invoke "kamal:cli:build:deliver", [], invoke_options
end
with_lock do
run_hook "pre-deploy"
say "Detect stale containers...", :magenta
@@ -85,7 +85,7 @@ class Kamal::Cli::Main < Kamal::Cli::Base
def rollback(version)
rolled_back = false
runtime = print_runtime do
mutating do
with_lock do
invoke_options = deploy_options
KAMAL.config.version = version
@@ -193,7 +193,7 @@ class Kamal::Cli::Main < Kamal::Cli::Base
option :confirmed, aliases: "-y", type: :boolean, default: false, desc: "Proceed without confirmation question"
def remove
confirming "This will remove all containers and images. Are you sure?" do
mutating do
with_lock do
invoke "kamal:cli:traefik:remove", [], options.without(:confirmed)
invoke "kamal:cli:app:remove", [], options.without(:confirmed)
invoke "kamal:cli:accessory:remove", [ "all" ], options

6
lib/kamal/cli/prune.rb
View File

@@ -1,7 +1,7 @@
class Kamal::Cli::Prune < Kamal::Cli::Base
desc "all", "Prune unused images and stopped containers"
def all
mutating do
with_lock do
containers
images
end
@@ -9,7 +9,7 @@ class Kamal::Cli::Prune < Kamal::Cli::Base
desc "images", "Prune unused images"
def images
mutating do
with_lock do
on(KAMAL.hosts) do
execute *KAMAL.auditor.record("Pruned images"), verbosity: :debug
execute *KAMAL.prune.dangling_images
@@ -24,7 +24,7 @@ class Kamal::Cli::Prune < Kamal::Cli::Base
retain = options.fetch(:retain, KAMAL.config.retain_containers)
raise "retain must be at least 1" if retain < 1
mutating do
with_lock do
on(KAMAL.hosts) do
execute *KAMAL.auditor.record("Pruned containers"), verbosity: :debug
execute *KAMAL.prune.app_containers(retain: retain)

30
lib/kamal/cli/server.rb
View File

@@ -23,25 +23,27 @@ class Kamal::Cli::Server < Kamal::Cli::Base
desc "bootstrap", "Set up Docker to run Kamal apps"
def bootstrap
missing = []
with_lock do
missing = []
on(KAMAL.hosts | KAMAL.accessory_hosts) do |host|
unless execute(*KAMAL.docker.installed?, raise_on_non_zero_exit: false)
if execute(*KAMAL.docker.superuser?, raise_on_non_zero_exit: false)
info "Missing Docker on #{host}. Installing…"
execute *KAMAL.docker.install
else
missing << host
on(KAMAL.hosts | KAMAL.accessory_hosts) do |host|
unless execute(*KAMAL.docker.installed?, raise_on_non_zero_exit: false)
if execute(*KAMAL.docker.superuser?, raise_on_non_zero_exit: false)
info "Missing Docker on #{host}. Installing…"
execute *KAMAL.docker.install
else
missing << host
end
end
execute(*KAMAL.server.ensure_run_directory)
end
execute(*KAMAL.server.ensure_run_directory)
end
if missing.any?
raise "Docker is not installed on #{missing.join(", ")} and can't be automatically installed without having root access and either `wget` or `curl`. Install Docker manually: https://docs.docker.com/engine/install/"
end
if missing.any?
raise "Docker is not installed on #{missing.join(", ")} and can't be automatically installed without having root access and either `wget` or `curl`. Install Docker manually: https://docs.docker.com/engine/install/"
run_hook "docker-setup"
end
run_hook "docker-setup"
end
end

16
lib/kamal/cli/traefik.rb
View File

@@ -1,7 +1,7 @@
class Kamal::Cli::Traefik < Kamal::Cli::Base
desc "boot", "Boot Traefik on servers"
def boot
mutating do
with_lock do
on(KAMAL.traefik_hosts) do
execute *KAMAL.registry.login
execute *KAMAL.traefik.start_or_run
@@ -14,7 +14,7 @@ class Kamal::Cli::Traefik < Kamal::Cli::Base
option :confirmed, aliases: "-y", type: :boolean, default: false, desc: "Proceed without confirmation question"
def reboot
confirming "This will cause a brief outage on each host. Are you sure?" do
mutating do
with_lock do
host_groups = options[:rolling] ? KAMAL.traefik_hosts : [ KAMAL.traefik_hosts ]
host_groups.each do |hosts|
host_list = Array(hosts).join(",")
@@ -34,7 +34,7 @@ class Kamal::Cli::Traefik < Kamal::Cli::Base
desc "start", "Start existing Traefik container on servers"
def start
mutating do
with_lock do
on(KAMAL.traefik_hosts) do
execute *KAMAL.auditor.record("Started traefik"), verbosity: :debug
execute *KAMAL.traefik.start
@@ -44,7 +44,7 @@ class Kamal::Cli::Traefik < Kamal::Cli::Base
desc "stop", "Stop existing Traefik container on servers"
def stop
mutating do
with_lock do
on(KAMAL.traefik_hosts) do
execute *KAMAL.auditor.record("Stopped traefik"), verbosity: :debug
execute *KAMAL.traefik.stop, raise_on_non_zero_exit: false
@@ -54,7 +54,7 @@ class Kamal::Cli::Traefik < Kamal::Cli::Base
desc "restart", "Restart existing Traefik container on servers"
def restart
mutating do
with_lock do
stop
start
end
@@ -91,7 +91,7 @@ class Kamal::Cli::Traefik < Kamal::Cli::Base
desc "remove", "Remove Traefik container and image from servers"
def remove
mutating do
with_lock do
stop
remove_container
remove_image
@@ -100,7 +100,7 @@ class Kamal::Cli::Traefik < Kamal::Cli::Base
desc "remove_container", "Remove Traefik container from servers", hide: true
def remove_container
mutating do
with_lock do
on(KAMAL.traefik_hosts) do
execute *KAMAL.auditor.record("Removed traefik container"), verbosity: :debug
execute *KAMAL.traefik.remove_container
@@ -110,7 +110,7 @@ class Kamal::Cli::Traefik < Kamal::Cli::Base
desc "remove_image", "Remove Traefik image from servers", hide: true
def remove_image
mutating do
with_lock do
on(KAMAL.traefik_hosts) do
execute *KAMAL.auditor.record("Removed traefik image"), verbosity: :debug
execute *KAMAL.traefik.remove_image

7
lib/kamal/commander.rb
View File

@@ -2,12 +2,13 @@ require "active_support/core_ext/enumerable"
require "active_support/core_ext/module/delegation"
class Kamal::Commander
attr_accessor :verbosity, :holding_lock
attr_accessor :verbosity, :holding_lock, :connected
delegate :hosts, :roles, :primary_host, :primary_role, :roles_on, :traefik_hosts, :accessory_hosts, to: :specifics
def initialize
self.verbosity = :info
self.holding_lock = false
self.connected = false
@specifics = nil
end
@@ -137,6 +138,10 @@ class Kamal::Commander
self.holding_lock
end
def connected?
self.connected
end
private
# Lazy setup of SSHKit
def configure_sshkit_with(config)