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@ecpplus
Created May 7, 2020 08:11
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コンパイル :
require "process"
require "json"
stdout = IO::Memory.new
stderr = IO::Memory.new
status = Process.run(
"aws",
%w|ec2 describe-instances --filters --region ap-northeast-1|,
output: stdout,
error: stderr,
)
unless status.success?
puts "Failed"
puts stderr
exit 1
end
result = JSON.parse(stdout.to_s)
instances = result["Reservations"].as_a.flat_map do |reservation|
reservation["Instances"].as_a.map do |instance|
name = ""
if instance["Tags"]? != nil
name_tag = instance["Tags"].as_a.find { |tag| tag["Key"]? == "Name" }
name = name_tag.not_nil!.dig("Value").as_s
end
ip_addr = instance["PublicIpAddress"]?
if name_tag != nil && ip_addr != nil
{
name: name,
public_ip_address: ip_addr ? ip_addr.not_nil!.as_s : "",
}
end
end
end.select { |h| h != nil }.sort_by { |h| h.not_nil![:name] }
max_name_length = instances.max_of { |h| h.not_nil!.[:name].not_nil!.size }
instances.each do |h|
puts "%#{max_name_length}s %s" % [h.not_nil![:name], h.not_nil![:public_ip_address]]
end
@ecpplus
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Author

ecpplus commented May 7, 2020

Build: crystal build --release ec2-ip-addresses.cr

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