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# frozen_string_literal: true
require 'ipaddr'
require 'open3'
module HyperstackVM
# Validates and runs the local WireGuard setup script for a VM.
class WireGuardSetup
def initialize(config:, ssh_runner:, local_wireguard:, out:, wg_setup_pre: nil, wg_setup_post: nil)
@config = config
@ssh_runner = ssh_runner
@local_wireguard = local_wireguard
@out = out
@wg_setup_pre = wg_setup_pre
@wg_setup_post = wg_setup_post
end
def run(state)
@wg_setup_pre&.call
if setup_needed?(state)
execute(state['public_ip'])
state['wireguard_setup_at'] = Time.now.utc.iso8601
end
@wg_setup_post&.call
end
def setup_needed?(state)
return false unless @config.wireguard_auto_setup?
public_ip = state['public_ip'].to_s.strip
return true if public_ip.empty?
expected = "#{public_ip}:#{@config.wireguard_udp_port}"
!endpoints.include?(expected)
end
private
def endpoints
Array(@local_wireguard.status['endpoints']).compact.uniq
end
def execute(host)
validate_script!
retries = 3
retries.times do |attempt|
info "Running WireGuard auto-setup via #{@config.wireguard_setup_script} #{host}..."
status = run_script(host)
return if status.success?
if attempt == retries - 1
raise Error, "WireGuard setup failed after #{retries} attempts (exit #{status.exitstatus})."
end
delay = (attempt + 1) * 15
warn_out "WireGuard setup attempt #{attempt + 1}/#{retries} failed (exit #{status.exitstatus}), retrying in #{delay}s..."
sleep delay
end
end
def run_script(host)
env = {
'HYPERSTACK_SSH_PORT' => @config.ssh_port.to_s,
'HYPERSTACK_SSH_CONNECT_TIMEOUT' => @config.ssh_connect_timeout.to_s,
'HYPERSTACK_SSH_KNOWN_HOSTS_PATH' => @config.ssh_known_hosts_path,
'HYPERSTACK_SSH_PRIVATE_KEY_PATH' => (File.exist?(@config.ssh_private_key_path) ? @config.ssh_private_key_path : '')
}
Open3.popen2e(env, 'bash', @config.wireguard_setup_script, host,
@config.wireguard_gateway_ip,
@config.wireguard_gateway_hostname) do |stdin, output, wait_thr|
stdin.sync = true
stdin.puts
stdin.close
output.each { |line| @out.print(line) }
wait_thr.value
end
end
def validate_script!
script_path = @config.wireguard_setup_script
raise Error, "WireGuard setup script not found: #{script_path}" unless File.exist?(script_path)
mismatches = []
mismatches << "ssh.username must be 'ubuntu'" unless @config.ssh_username == 'ubuntu'
mismatches << "local_client.interface_name must be 'wg1'" unless @config.local_interface_name == 'wg1'
mismatches << 'network.wireguard_udp_port must be 56710' unless @config.wireguard_udp_port == 56_710
unless @config.wireguard_subnet == '192.168.3.0/24'
mismatches << "network.wireguard_subnet must be '192.168.3.0/24'"
end
begin
subnet = IPAddr.new(@config.wireguard_subnet)
server_ip = IPAddr.new(@config.wireguard_gateway_ip)
unless subnet.include?(server_ip)
mismatches << "wireguard_server_ip #{@config.wireguard_gateway_ip.inspect} is outside #{@config.wireguard_subnet}"
end
rescue IPAddr::InvalidAddressError => e
mismatches << "Invalid wireguard_server_ip: #{e.message}"
end
return if mismatches.empty?
raise Error, "Configured WireGuard settings do not match #{script_path}: #{mismatches.join('; ')}"
end
def info(msg)
@out.puts(msg)
end
def warn_out(msg)
@out.puts("WARN: #{msg}")
end
end
end
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