faaso/src/funko.cr

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Crystal
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require "yaml"
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# A funko, built from its source metadata
class Funko
include YAML::Serializable
# Required, the name of the funko. Must be unique across FaaSO
property name : String
# if Nil, it has no template whatsoever
property runtime : (String | Nil)? = nil
# Port of the funko process (optional, default is 3000)
property port : UInt32? = 3000
# Extra packages, passed as EXTRA_PACKAGES argument
# to the Dockerfile, use it for installing things in
# the SHIPPED docker image
property extra_packages : Array(String)?
# Extra packages, passed as DEVEL_PACKAGES argument
# to the Dockerfile, use it for installing things in
# the docker stage used to build the code
property devel_packages : Array(String)?
# Where this is located in the filesystem
@[YAML::Field(ignore: true)]
property path : String = ""
# Create an Array of funkos from an Array of folders containing definitions
def self.from_paths(paths : Array(String | Path)) : Array(Funko)
paths.map { |path| Path.new(path, "funko.yml") }
.select { |path| File.exists?(path) }
.map { |path|
f = Funko.from_yaml(File.read(path.to_s))
f.path = path.parent.to_s
f
}
end
# Return a list of image IDs for this funko, most recent first
def image_history
docker_api = Docr::API.new(Docr::Client.new)
begin
docker_api.images.history(
name: name
).sort { |i, j| j.@created <=> i.@created }.map(&.@id)
rescue ex : Docr::Errors::DockerAPIError
puts "Error: #{ex}"
[] of String
end
end
# Get all containers related to this funko
def containers
docker_api = Docr::API.new(Docr::Client.new)
docker_api.containers.list(
all: true,
filters: {"name" => ["faaso-#{name}"]}
)
end
# Is any instance of this funko running?
def running?
self.containers.any? { |container|
container.@state == "running"
}
end
# Is any instance of this funko paused?
def paused?
self.containers.any? { |container|
container.@state == "paused"
}
end
# Unpause paused container with the newer image
def unpause
docker_api = Docr::API.new(Docr::Client.new)
images = self.image_history
paused = self.containers.select { |container|
container.@state == "paused"
}.sort! { |i, j|
(images.index(j.@image_id) || 9999) <=> (images.index(i.@image_id) || 9999)
}
docker_api.containers.unpause(paused[0].@id) unless paused.empty?
end
# Is any instance of this funko exited?
def exited?
self.containers.any? { |container|
container.@state == "exited"
}
end
# Restart exited container with the newer image
def start
# FIXME refactor DRY with unpause
docker_api = Docr::API.new(Docr::Client.new)
images = self.image_history
exited = self.containers.select { |container|
container.@state == "exited"
}.sort! { |i, j|
(images.index(j.@image_id) || 9999) <=> (images.index(i.@image_id) || 9999)
}
docker_api.containers.restart(exited[0].@id) unless exited.empty?
end
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# Create a container for this funko
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def create_container( autostart : Bool = true) : String
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conf = Docr::Types::CreateContainerConfig.new(
image: "#{name}:latest",
hostname: name,
# Port in the container side
# FIXME: Maybe don't need this now we are using the proxy
exposed_ports: {"#{port}/tcp" => {} of String => String},
host_config: Docr::Types::HostConfig.new(
network_mode: "faaso-net",
# Also probably not needed anymore
port_bindings: {"#{port}/tcp" => [Docr::Types::PortBinding.new(
host_port: "", # Host port, empty means random
host_ip: "127.0.0.1", # Host IP
)]}
)
)
docker_api = Docr::API.new(Docr::Client.new)
response = docker_api.containers.create(name: "faaso-#{name}", config: conf)
response.@warnings.each { |msg| puts "Warning: #{msg}" }
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docker_api.containers.start(response.@id) if autostart
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response.@id
end
end