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セキュリティグループで許可するIPアドレスを入れ替えるスクリプトのサンプル
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require "aws-sdk" | |
require "aws-sdk-core/errors" | |
# セキュリティグループで許可するIPアドレスを入れ替えるスクリプトのサンプル | |
# | |
# 許可すべきIPアドレスをホワイトリスト指定しているが、そのリストがときどき変わる | |
# というような場合に利用する。 | |
# | |
# 対象のセキュリティグループに存在するルールを全て削除し、 | |
# new_ip_addressesで指定されたIPアドレスを許可するルールを追加する。 | |
def add_ip_range(sg_id:, ip_addresses:, ip_protocol:, from_port:, to_port:) | |
sg = Aws::EC2::SecurityGroup.new(sg_id, region: @region) | |
if @dry_run | |
result = "DRY_RUN" | |
else | |
begin | |
sg.authorize_ingress( | |
ip_permissions: [ | |
{ | |
ip_protocol: ip_protocol, | |
from_port: from_port, | |
to_port: to_port, | |
ip_ranges: ip_addresses.map {|ip_address| | |
{ | |
cidr_ip: "#{ip_address}/32", | |
description: "AUTO_ADDED", | |
} | |
}, | |
ipv_6_ranges: [ {} ], | |
prefix_list_ids: [ {} ], | |
} | |
] | |
) | |
result = "SUCCESS" | |
rescue Aws::Errors::ServiceError => e | |
puts e.message | |
result = "ERROR" | |
end | |
end | |
puts "[#{result}] Add #{sg_id}: #{ip_addresses.join(',')}" | |
end | |
def remove_ip_range(sg_id:, permission:, range:) | |
sg = Aws::EC2::SecurityGroup.new(sg_id, region: @region) | |
if @dry_run | |
result = "DRY_RUN" | |
else | |
begin | |
unless @dry_run | |
sg.revoke_ingress( | |
ip_permissions: [ | |
{ | |
ip_protocol: permission.ip_protocol, | |
from_port: permission.from_port, | |
to_port: permission.to_port, | |
ip_ranges: [range], | |
ipv_6_ranges: [ {} ], | |
prefix_list_ids: [ {} ], | |
} | |
] | |
) | |
end | |
result = "SUCCESS" | |
rescue Aws::Errors::ServiceError => e | |
puts e.message | |
result = "ERROR" | |
end | |
end | |
puts "[#{result}] Remove #{sg_id}: #{permission.ip_protocol}/#{permission.from_port}/#{range.cidr_ip}/#{range.description}" | |
end | |
@dry_run = true | |
@region = "ap-northeast-1" | |
@sg_id = "sg-0ef6d56b" # このセキュリティグループを対象とする | |
# 許可すべき新しいIPアドレスリスト | |
new_ip_addresses = %w[ | |
1.1.1.5 | |
1.1.1.6 | |
] | |
ec2 = Aws::EC2::Client.new(region: @region) | |
ec2.describe_security_groups.data.security_groups.each do |sg| | |
next unless sg.group_id == @sg_id | |
sg.ip_permissions.each do |perm| | |
perm.ip_ranges.each do |range| | |
if range.description.to_s.include?("AUTO_ADDED") | |
remove_ip_range(sg_id: sg.group_id, permission: perm, range: range) | |
end | |
end | |
end | |
add_ip_range(sg_id: @sg_id, ip_addresses: new_ip_addresses, ip_protocol: "tcp", from_port: "22", to_port: "22") | |
end |
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