Sources split.
This commit is contained in:
parent
21f8d2d7d2
commit
61c9f33f89
76
src/environment.cr
Normal file
76
src/environment.cr
Normal file
@ -0,0 +1,76 @@
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require "yaml"
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class Environment
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enum Type
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Prefix
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RootFileSystem
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end
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YAML.mapping({
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name: String,
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type: {
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type: Type,
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default: Type::Prefix
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},
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domain_name: {
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type: String?,
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key: "domain-name"
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},
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checks: {
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# FIXME: Would probably need a more neutral namespace.
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type: Array(ServiceDefinition::Checks),
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default: Array(ServiceDefinition::Checks).new
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}
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})
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def initialize()
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@name = "root"
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@type = Type::Prefix
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@checks = Array(ServiceDefinition::Checks).new
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# FIXME: Should this *really* be here?
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@checks << ServiceDefinition::Checks.from_yaml <<-EOF
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name: Creating data directory
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directory: /srv/%{ENVIRONMENT}
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command: mkdir -p /srv/%{ENVIRONMENT} && chmod a+rwt /srv/%{ENVIRONMENT}
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EOF
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end
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class_getter root = Environment.new
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class_getter all = [@@root] of Environment
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def self.load(path)
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Dir.each_child path do |child|
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unless child.match /\.yaml$/
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next
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end
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file_path = "#{path}/#{child}"
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begin
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environment = Environment.from_yaml File.read file_path
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rescue e
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STDERR << "error loading #{file_path}: " << e << "\n"
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# FIXME: Print stacktrace? Debug mode?
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next
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end
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@@all << environment
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end
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end
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def self.get(name)
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_def = @@all.find &.name.==(name)
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if _def.nil?
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raise Exception.new "Environment '#{name}' does not exist."
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end
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_def
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end
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def to_s
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"#{name} (#{type.to_s.downcase})"
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end
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end
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494
src/main.cr
494
src/main.cr
@ -12,497 +12,9 @@ ENVIRONMENTS_DIRECTORY = "./environments"
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# TODO:
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# - Be more declarative about the definition of commands.
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def split_command(string)
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args = string.split /\ (?=([^\"]*\"[^\"]*\")*[^\"]*$)/
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command = args[0]
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args.delete_at 0
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return command, args
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end
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class ServiceDefinition
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struct Consumes
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YAML.mapping({
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token: String,
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optional: {
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type: Bool,
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default: false
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}
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})
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end
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struct Provides
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YAML.mapping({
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token: String
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})
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end
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struct Checks
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YAML.mapping({
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name: String,
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file: String?,
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directory: String?,
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command: String
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})
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end
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YAML.mapping({
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name: String,
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command: String,
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stop_command: {
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type: String?,
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key: "stop-command"
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},
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directory: String?, # Place to chdir to before running @command.
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environment: {
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type: Environment,
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default: Environment.root
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},
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provides: {
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type: Array(Provides),
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default: [] of Provides
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},
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consumes: {
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type: Array(Consumes),
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default: [] of Consumes
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},
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checks: {
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type: Array(Checks),
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default: [] of Checks
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},
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environment_variables: {
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type: Array(String),
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key: "environment-variables",
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default: [] of String
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}
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})
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def self.new(name)
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Service.from_yaml File.read "#{name}.yaml"
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end
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class_getter all = [] of ServiceDefinition
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def self.load(path)
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Dir.each_child path do |child|
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unless child.match /\.yaml$/
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next
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end
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@@all << ServiceDefinition.from_yaml File.read "#{path}/#{child}"
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end
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end
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def self.get(name) : ServiceDefinition
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_def = @@all.find &.name.==(name)
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if _def.nil?
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raise Exception.new "Service '#{name}' does not exist."
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end
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_def
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end
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def to_s
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name
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end
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end
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class Environment
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enum Type
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Prefix
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RootFileSystem
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end
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YAML.mapping({
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name: String,
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type: {
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type: Type,
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default: Type::Prefix
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},
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domain_name: {
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type: String?,
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key: "domain-name"
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},
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checks: {
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# FIXME: Would probably need a more neutral namespace.
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type: Array(ServiceDefinition::Checks),
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default: Array(ServiceDefinition::Checks).new
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}
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})
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def initialize()
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@name = "root"
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@type = Type::Prefix
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@checks = Array(ServiceDefinition::Checks).new
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# FIXME: Should this *really* be here?
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@checks << ServiceDefinition::Checks.from_yaml <<-EOF
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name: Creating data directory
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directory: /srv/%{ENVIRONMENT}
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command: mkdir -p /srv/%{ENVIRONMENT} && chmod a+rwt /srv/%{ENVIRONMENT}
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EOF
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end
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class_getter root = Environment.new
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class_getter all = [@@root] of Environment
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def self.load(path)
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Dir.each_child path do |child|
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unless child.match /\.yaml$/
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next
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end
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file_path = "#{path}/#{child}"
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begin
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environment = Environment.from_yaml File.read file_path
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rescue e
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STDERR << "error loading #{file_path}: " << e << "\n"
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# FIXME: Print stacktrace? Debug mode?
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next
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end
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@@all << environment
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end
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end
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def self.get(name)
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_def = @@all.find &.name.==(name)
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if _def.nil?
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raise Exception.new "Environment '#{name}' does not exist."
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end
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_def
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end
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def to_s
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"#{name} (#{type.to_s.downcase})"
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end
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end
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class Service
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getter environment : Environment
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getter providers = ProvidersList.new
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class Exception < ::Exception
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end
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class ProvidersList < Hash(String, String)
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def []?(name)
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super(name).try { |x| Service.get_by_id x}
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end
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end
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struct AsYAML
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YAML.mapping({
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name: String,
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environment: String,
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consumes: {
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type: Array(YAMLConsumes),
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default: [] of YAMLConsumes
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}
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})
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end
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struct YAMLConsumes
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YAML.mapping({
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token: String,
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from: String
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})
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end
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def initialize(name, environment_name : String?, @consumes = [] of YAMLConsumes)
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@reference = ServiceDefinition.get name
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@environment = if environment_name.nil? || environment_name == ""
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Environment.root
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else
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Environment.get environment_name
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end
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@consumes.each do |consume|
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@providers[consume.token] = consume.from
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end
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end
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def self.from_yaml(yaml)
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yaml = AsYAML.from_yaml yaml
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self.new yaml.name, yaml.environment, yaml.consumes
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end
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def to_yaml
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{
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name: name,
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environment: @environment.name
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}.to_yaml
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end
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def id
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if @environment.name == "root"
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name
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else
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"#{@environment.name}/#{name}"
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end
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end
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# FIXME: At this point, macros would be both more readable and shorter.
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def name
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@reference.name
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end
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def type
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@reference.type
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end
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def command
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@reference.command
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end
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def stop_command
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@reference.stop_command
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end
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def provides
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@reference.provides
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end
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def export_environment_variables
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ENV["SERVICE_ENVIRONMENT"] = @environment.name
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ENV["SERVICE_ENVIRONMENT_TYPE"] = @environment.type.to_s
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# FIXME: Parsing should probably be done… when parsing the file.
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# FIXME: Parsing is probably a bit primitive. Maybe this isn’t the right way of defining this.
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@reference.environment_variables.each do |string|
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# FIXME: Should probably deserve a warning.
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variable = string.match(/^[^=]*=/).not_nil![0]
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value = string[variable.size..string.size]
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variable = variable[0..variable.size-2]
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ENV[variable] = value
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end
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end
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private def evaluate(string)
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string.gsub /%{[a-zA-Z]+}/ do |match|
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match = match[2..match.size-2]
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if match.downcase == "environment"
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@environment.name
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else
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""
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end
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end
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end
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def start(pid_dir : String, log_dir : String)
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export_environment_variables
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(@environment.checks + @reference.checks).each do |check|
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run_check = false
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check.file.try do |file|
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run_check = true if ! File.exists? evaluate file
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end
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check.directory.try do |directory|
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run_check = true if ! Dir.exists? evaluate directory
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end
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unless run_check
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next
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end
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puts " - #{check.name}"
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# FIXME: Output? Only in debug mode?
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child = Process.run "sh", ["-c", evaluate check.command], output: Process::Redirect::Inherit, error: Process::Redirect::Inherit
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if child.exit_status != 0
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raise Service::Exception.new "Child process exited with status “#{child.exit_status}”."
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break
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end
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end
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# FIXME: Should evaluate be used in split_command? What namespace should split_command use?
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command, args = split_command command
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args.map! do |arg| evaluate arg end
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process = Process.fork do
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base_log_name = "#{log_dir}/#{name}.#{@environment.name}"
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stdout_file = File.open "#{base_log_name}.out", "w"
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stderr_file = File.open "#{base_log_name}.err", "w"
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LibC.dup2 stdout_file.fd, 1
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LibC.dup2 stderr_file.fd, 2
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Process.exec command, args, chdir: @reference.directory
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end
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self.save_pid pid_dir, process.pid
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end
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# TODO:
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# - Custom shutdown commands.
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# - Should we wait for the process to die?
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# - Shouldn’t we remove the pid file?
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def stop(pid_dir : String)
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_pid = pid pid_dir
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if _pid
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command = stop_command
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if command
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command, args = split_command command
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Process.run(command, args)
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else
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Process.kill Signal::TERM, _pid
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end
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else
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# Already stopped or dead, nothing to be done here.
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end
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end
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def get_pid_file(pid_dir)
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"#{pid_dir}/#{name}.pid"
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end
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def pid(pid_dir)
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File.read(get_pid_file pid_dir).to_i
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rescue e # pid file missing, corrupted or otherwise not readable
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nil
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end
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def save_pid(pid_dir, new_pid)
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File.write get_pid_file(pid_dir), new_pid
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end
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enum Status
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Running
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Dead
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Stopped
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end
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def status(pid_dir)
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_pid = pid pid_dir
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if _pid
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if Process.exists? _pid
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Status::Running
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else
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Status::Dead
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end
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else
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Status::Stopped
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end
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end
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def running?(pid_dir)
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status(pid_dir) == Service::Status::Running
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end
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def to_s
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"#{name} (in #{@environment.name})"
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end
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def summary
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"Name: #{name}\n" +
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"Environment: #{environment.name} (#{environment.type.to_s.downcase})\n" +
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(
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if provides.size > 0
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"Provides:\n" +
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(provides.map { |x| " - " + x.token + "\n" }).join
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else
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""
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end
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) +
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(
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if @reference.consumes.size > 0
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"Consumes:\n" +
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(@reference.consumes.map { |x|
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provider = @providers[x.token]?
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if provider
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" - #{x.token} (from #{provider.id})\n"
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else
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" - #{x.token} " +
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"(NOT CURRENTLY PROVIDED)".colorize(:red).to_s +
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"\n"
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end
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}).join
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else
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""
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end
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)
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end
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class_getter all = [] of Service
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def self.load(path)
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Dir.each_child path do |child|
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unless child.match /\.yaml$/
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next
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end
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@@all << Service.from_yaml File.read "#{path}/#{child}"
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end
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end
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def write(path)
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File.write "#{path}/#{name}.#{@environment.name}.yaml", to_yaml
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end
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def remove(path)
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File.delete "#{path}/#{name}.#{@environment.name}.yaml"
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end
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def self.get_by_id(id)
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matches = id.match /[^\/]*/
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unless matches # Should not happen, above regex would always match.
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raise Exception.new "FIXME"
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end
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environment_name = matches[0]
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service_name = if environment_name == id
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environment_name = "root"
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id
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else
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id.sub 0..matches[0].size, ""
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end
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@@all.find do |service|
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service.name == service_name
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end
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end
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def is_id?(id)
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id == self.id || (@environment.name == "root" && id == "root/#{name}")
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end
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alias ServiceTree = Array(ServiceTree) | Service
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|
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# Returns a dependency tree.
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# You’ll probably want to flatten and reverse it afterwards.
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def dependency_tree
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tree = [self] of ServiceTree
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|
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@consumes.each do |token|
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service = Service.get_by_id token.from
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|
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unless service
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# FIXME: Does it make the dep tree invalid?
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# FIXME: Only optional deps should be fine.
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next
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end
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|
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tree << service.dependency_tree
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end
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|
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tree
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end
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|
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def reverse_dependency_tree
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tree = [self] of ServiceTree
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|
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@@all.each do |service|
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service.providers.any? do |token, id|
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if self.is_id?(id) && ! tree.any? service
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tree << service
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end
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end
|
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end
|
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|
||||
tree
|
||||
end
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end
|
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require "./service_definition.cr"
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require "./environment.cr"
|
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require "./service.cr"
|
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|
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args = [] of String
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|
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|
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337
src/service.cr
Normal file
337
src/service.cr
Normal file
@ -0,0 +1,337 @@
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require "yaml"
|
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require "colorize"
|
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|
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def split_command(string)
|
||||
args = string.split /\ (?=([^\"]*\"[^\"]*\")*[^\"]*$)/
|
||||
|
||||
command = args[0]
|
||||
args.delete_at 0
|
||||
|
||||
return command, args
|
||||
end
|
||||
|
||||
class Service
|
||||
getter environment : Environment
|
||||
getter providers = ProvidersList.new
|
||||
|
||||
class Exception < ::Exception
|
||||
end
|
||||
|
||||
class ProvidersList < Hash(String, String)
|
||||
def []?(name)
|
||||
super(name).try { |x| Service.get_by_id x}
|
||||
end
|
||||
end
|
||||
|
||||
struct AsYAML
|
||||
YAML.mapping({
|
||||
name: String,
|
||||
environment: String,
|
||||
consumes: {
|
||||
type: Array(YAMLConsumes),
|
||||
default: [] of YAMLConsumes
|
||||
}
|
||||
})
|
||||
end
|
||||
struct YAMLConsumes
|
||||
YAML.mapping({
|
||||
token: String,
|
||||
from: String
|
||||
})
|
||||
end
|
||||
|
||||
def initialize(name, environment_name : String?, @consumes = [] of YAMLConsumes)
|
||||
@reference = ServiceDefinition.get name
|
||||
@environment = if environment_name.nil? || environment_name == ""
|
||||
Environment.root
|
||||
else
|
||||
Environment.get environment_name
|
||||
end
|
||||
|
||||
@consumes.each do |consume|
|
||||
@providers[consume.token] = consume.from
|
||||
end
|
||||
end
|
||||
|
||||
def self.from_yaml(yaml)
|
||||
yaml = AsYAML.from_yaml yaml
|
||||
|
||||
|
||||
self.new yaml.name, yaml.environment, yaml.consumes
|
||||
end
|
||||
def to_yaml
|
||||
{
|
||||
name: name,
|
||||
environment: @environment.name
|
||||
}.to_yaml
|
||||
end
|
||||
|
||||
def id
|
||||
if @environment.name == "root"
|
||||
name
|
||||
else
|
||||
"#{@environment.name}/#{name}"
|
||||
end
|
||||
end
|
||||
|
||||
# FIXME: At this point, macros would be both more readable and shorter.
|
||||
def name
|
||||
@reference.name
|
||||
end
|
||||
def type
|
||||
@reference.type
|
||||
end
|
||||
def command
|
||||
@reference.command
|
||||
end
|
||||
def stop_command
|
||||
@reference.stop_command
|
||||
end
|
||||
def provides
|
||||
@reference.provides
|
||||
end
|
||||
|
||||
def export_environment_variables
|
||||
ENV["SERVICE_ENVIRONMENT"] = @environment.name
|
||||
ENV["SERVICE_ENVIRONMENT_TYPE"] = @environment.type.to_s
|
||||
|
||||
# FIXME: Parsing should probably be done… when parsing the file.
|
||||
# FIXME: Parsing is probably a bit primitive. Maybe this isn’t the right way of defining this.
|
||||
@reference.environment_variables.each do |string|
|
||||
# FIXME: Should probably deserve a warning.
|
||||
variable = string.match(/^[^=]*=/).not_nil![0]
|
||||
value = string[variable.size..string.size]
|
||||
variable = variable[0..variable.size-2]
|
||||
|
||||
ENV[variable] = value
|
||||
end
|
||||
end
|
||||
private def evaluate(string)
|
||||
string.gsub /%{[a-zA-Z]+}/ do |match|
|
||||
match = match[2..match.size-2]
|
||||
|
||||
if match.downcase == "environment"
|
||||
@environment.name
|
||||
else
|
||||
""
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
def start(pid_dir : String, log_dir : String)
|
||||
export_environment_variables
|
||||
|
||||
(@environment.checks + @reference.checks).each do |check|
|
||||
run_check = false
|
||||
|
||||
check.file.try do |file|
|
||||
run_check = true if ! File.exists? evaluate file
|
||||
end
|
||||
|
||||
check.directory.try do |directory|
|
||||
run_check = true if ! Dir.exists? evaluate directory
|
||||
end
|
||||
|
||||
unless run_check
|
||||
next
|
||||
end
|
||||
|
||||
puts " - #{check.name}"
|
||||
|
||||
# FIXME: Output? Only in debug mode?
|
||||
child = Process.run "sh", ["-c", evaluate check.command], output: Process::Redirect::Inherit, error: Process::Redirect::Inherit
|
||||
|
||||
if child.exit_status != 0
|
||||
raise Service::Exception.new "Child process exited with status “#{child.exit_status}”."
|
||||
break
|
||||
end
|
||||
end
|
||||
|
||||
# FIXME: Should evaluate be used in split_command? What namespace should split_command use?
|
||||
command, args = split_command command
|
||||
args.map! do |arg| evaluate arg end
|
||||
|
||||
process = Process.fork do
|
||||
base_log_name = "#{log_dir}/#{name}.#{@environment.name}"
|
||||
stdout_file = File.open "#{base_log_name}.out", "w"
|
||||
stderr_file = File.open "#{base_log_name}.err", "w"
|
||||
|
||||
LibC.dup2 stdout_file.fd, 1
|
||||
LibC.dup2 stderr_file.fd, 2
|
||||
|
||||
Process.exec command, args, chdir: @reference.directory
|
||||
end
|
||||
|
||||
self.save_pid pid_dir, process.pid
|
||||
end
|
||||
|
||||
# TODO:
|
||||
# - Custom shutdown commands.
|
||||
# - Should we wait for the process to die?
|
||||
# - Shouldn’t we remove the pid file?
|
||||
def stop(pid_dir : String)
|
||||
_pid = pid pid_dir
|
||||
|
||||
if _pid
|
||||
command = stop_command
|
||||
if command
|
||||
command, args = split_command command
|
||||
|
||||
Process.run(command, args)
|
||||
else
|
||||
Process.kill Signal::TERM, _pid
|
||||
end
|
||||
else
|
||||
# Already stopped or dead, nothing to be done here.
|
||||
end
|
||||
end
|
||||
|
||||
def get_pid_file(pid_dir)
|
||||
"#{pid_dir}/#{name}.pid"
|
||||
end
|
||||
|
||||
def pid(pid_dir)
|
||||
File.read(get_pid_file pid_dir).to_i
|
||||
rescue e # pid file missing, corrupted or otherwise not readable
|
||||
nil
|
||||
end
|
||||
|
||||
def save_pid(pid_dir, new_pid)
|
||||
File.write get_pid_file(pid_dir), new_pid
|
||||
end
|
||||
|
||||
enum Status
|
||||
Running
|
||||
Dead
|
||||
Stopped
|
||||
end
|
||||
|
||||
def status(pid_dir)
|
||||
_pid = pid pid_dir
|
||||
|
||||
if _pid
|
||||
if Process.exists? _pid
|
||||
Status::Running
|
||||
else
|
||||
Status::Dead
|
||||
end
|
||||
else
|
||||
Status::Stopped
|
||||
end
|
||||
end
|
||||
def running?(pid_dir)
|
||||
status(pid_dir) == Service::Status::Running
|
||||
end
|
||||
|
||||
def to_s
|
||||
"#{name} (in #{@environment.name})"
|
||||
end
|
||||
|
||||
def summary
|
||||
"Name: #{name}\n" +
|
||||
"Environment: #{environment.name} (#{environment.type.to_s.downcase})\n" +
|
||||
(
|
||||
if provides.size > 0
|
||||
"Provides:\n" +
|
||||
(provides.map { |x| " - " + x.token + "\n" }).join
|
||||
else
|
||||
""
|
||||
end
|
||||
) +
|
||||
(
|
||||
if @reference.consumes.size > 0
|
||||
"Consumes:\n" +
|
||||
(@reference.consumes.map { |x|
|
||||
provider = @providers[x.token]?
|
||||
if provider
|
||||
" - #{x.token} (from #{provider.id})\n"
|
||||
else
|
||||
" - #{x.token} " +
|
||||
"(NOT CURRENTLY PROVIDED)".colorize(:red).to_s +
|
||||
"\n"
|
||||
end
|
||||
}).join
|
||||
else
|
||||
""
|
||||
end
|
||||
)
|
||||
end
|
||||
|
||||
class_getter all = [] of Service
|
||||
def self.load(path)
|
||||
Dir.each_child path do |child|
|
||||
unless child.match /\.yaml$/
|
||||
next
|
||||
end
|
||||
|
||||
@@all << Service.from_yaml File.read "#{path}/#{child}"
|
||||
end
|
||||
end
|
||||
|
||||
def write(path)
|
||||
File.write "#{path}/#{name}.#{@environment.name}.yaml", to_yaml
|
||||
end
|
||||
|
||||
def remove(path)
|
||||
File.delete "#{path}/#{name}.#{@environment.name}.yaml"
|
||||
end
|
||||
|
||||
def self.get_by_id(id)
|
||||
matches = id.match /[^\/]*/
|
||||
unless matches # Should not happen, above regex would always match.
|
||||
raise Exception.new "FIXME"
|
||||
end
|
||||
environment_name = matches[0]
|
||||
service_name = if environment_name == id
|
||||
environment_name = "root"
|
||||
id
|
||||
else
|
||||
id.sub 0..matches[0].size, ""
|
||||
end
|
||||
|
||||
@@all.find do |service|
|
||||
service.name == service_name
|
||||
end
|
||||
end
|
||||
def is_id?(id)
|
||||
id == self.id || (@environment.name == "root" && id == "root/#{name}")
|
||||
end
|
||||
|
||||
alias ServiceTree = Array(ServiceTree) | Service
|
||||
|
||||
# Returns a dependency tree.
|
||||
# You’ll probably want to flatten and reverse it afterwards.
|
||||
def dependency_tree
|
||||
tree = [self] of ServiceTree
|
||||
|
||||
@consumes.each do |token|
|
||||
service = Service.get_by_id token.from
|
||||
|
||||
unless service
|
||||
# FIXME: Does it make the dep tree invalid?
|
||||
# FIXME: Only optional deps should be fine.
|
||||
next
|
||||
end
|
||||
|
||||
tree << service.dependency_tree
|
||||
end
|
||||
|
||||
tree
|
||||
end
|
||||
|
||||
def reverse_dependency_tree
|
||||
tree = [self] of ServiceTree
|
||||
|
||||
@@all.each do |service|
|
||||
service.providers.any? do |token, id|
|
||||
if self.is_id?(id) && ! tree.any? service
|
||||
tree << service
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
tree
|
||||
end
|
||||
end
|
||||
|
||||
|
||||
87
src/service_definition.cr
Normal file
87
src/service_definition.cr
Normal file
@ -0,0 +1,87 @@
|
||||
require "yaml"
|
||||
|
||||
class ServiceDefinition
|
||||
struct Consumes
|
||||
YAML.mapping({
|
||||
token: String,
|
||||
optional: {
|
||||
type: Bool,
|
||||
default: false
|
||||
}
|
||||
})
|
||||
end
|
||||
struct Provides
|
||||
YAML.mapping({
|
||||
token: String
|
||||
})
|
||||
end
|
||||
struct Checks
|
||||
YAML.mapping({
|
||||
name: String,
|
||||
file: String?,
|
||||
directory: String?,
|
||||
command: String
|
||||
})
|
||||
end
|
||||
YAML.mapping({
|
||||
name: String,
|
||||
command: String,
|
||||
stop_command: {
|
||||
type: String?,
|
||||
key: "stop-command"
|
||||
},
|
||||
directory: String?, # Place to chdir to before running @command.
|
||||
environment: {
|
||||
type: Environment,
|
||||
default: Environment.root
|
||||
},
|
||||
provides: {
|
||||
type: Array(Provides),
|
||||
default: [] of Provides
|
||||
},
|
||||
consumes: {
|
||||
type: Array(Consumes),
|
||||
default: [] of Consumes
|
||||
},
|
||||
checks: {
|
||||
type: Array(Checks),
|
||||
default: [] of Checks
|
||||
},
|
||||
environment_variables: {
|
||||
type: Array(String),
|
||||
key: "environment-variables",
|
||||
default: [] of String
|
||||
}
|
||||
})
|
||||
|
||||
def self.new(name)
|
||||
Service.from_yaml File.read "#{name}.yaml"
|
||||
end
|
||||
|
||||
class_getter all = [] of ServiceDefinition
|
||||
|
||||
def self.load(path)
|
||||
Dir.each_child path do |child|
|
||||
unless child.match /\.yaml$/
|
||||
next
|
||||
end
|
||||
|
||||
@@all << ServiceDefinition.from_yaml File.read "#{path}/#{child}"
|
||||
end
|
||||
end
|
||||
|
||||
def self.get(name) : ServiceDefinition
|
||||
_def = @@all.find &.name.==(name)
|
||||
|
||||
if _def.nil?
|
||||
raise Exception.new "Service '#{name}' does not exist."
|
||||
end
|
||||
|
||||
_def
|
||||
end
|
||||
|
||||
def to_s
|
||||
name
|
||||
end
|
||||
end
|
||||
|
||||
Loading…
Reference in New Issue
Block a user