8d8f9f6ada
Add a deploy lock for commands that are unsafe to run concurrently.
The lock is taken by creating a `mrsk_lock` directory on the primary
host. Details of who took the lock are added to a details file in that
directory.
Additional CLI commands have been added to manual release and acquire
the lock and to check its status.
```
Commands:
mrsk lock acquire -m, --message=MESSAGE # Acquire the deploy lock
mrsk lock help [COMMAND] # Describe subcommands or one specific subcommand
mrsk lock release # Release the deploy lock
mrsk lock status # Report lock status
Options:
-v, [--verbose], [--no-verbose] # Detailed logging
-q, [--quiet], [--no-quiet] # Minimal logging
[--version=VERSION] # Run commands against a specific app version
-p, [--primary], [--no-primary] # Run commands only on primary host instead of all
-h, [--hosts=HOSTS] # Run commands on these hosts instead of all (separate by comma)
-r, [--roles=ROLES] # Run commands on these roles instead of all (separate by comma)
-c, [--config-file=CONFIG_FILE] # Path to config file
# Default: config/deploy.yml
-d, [--destination=DESTINATION] # Specify destination to be used for config file (staging -> deploy.staging.yml)
-B, [--skip-broadcast], [--no-skip-broadcast] # Skip audit broadcasts
```
If we add support for running multiple deployments on a single server
we'll need to extend the locking to lock per deployment.
64 lines
1.2 KiB
Ruby
64 lines
1.2 KiB
Ruby
require "active_support/duration"
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require "active_support/core_ext/numeric/time"
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class Mrsk::Commands::Lock < Mrsk::Commands::Base
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def acquire(message, version)
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combine \
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[:mkdir, lock_dir],
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write_lock_details(message, version)
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end
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def release
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combine \
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[:rm, lock_details_file],
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[:rm, "-r", lock_dir]
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end
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def status
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combine \
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stat_lock_dir,
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read_lock_details
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end
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private
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def write_lock_details(message, version)
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write \
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[:echo, "\"#{Base64.encode64(lock_details(message, version))}\""],
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lock_details_file
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end
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def read_lock_details
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pipe \
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[:cat, lock_details_file],
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[:base64, "-d"]
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end
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def stat_lock_dir
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write \
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[:stat, lock_dir],
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"/dev/null"
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end
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def lock_dir
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:mrsk_lock
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end
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def lock_details_file
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[lock_dir, :details].join("/")
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end
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def lock_details(message, version)
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<<~DETAILS.strip
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Locked by: #{locked_by} at #{Time.now.gmtime}
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Version: #{version}
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Message: #{message}
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DETAILS
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end
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def locked_by
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`git config user.name`.strip
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rescue Errno::ENOENT
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"Unknown"
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end
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end
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