使用 aws cli 更新 AWS 中安全组的现有 IP

Question

我有一个 shell 脚本，它将我的公共 IP 添加到指定的 ec2-security-group。我浏览了一些 AWS 文档，但找不到使用哪个 API 来更新现有 IP 地址，而不是简单地添加一个。

我经历了以下事情：

1. 更新安全组规则描述入口
2. 授权安全组入口

是否有一个API可以用来简单地更新安全组中现有的IP地址？

我使用以下 bash 脚本向安全组添加新条目。

#!/bin/bash
curl https://checkip.amazonaws.com > ip.txt
awk '{ print $0 "/32" }' < ip.txt > ipnew.txt
export stuff=$(cat ipnew.txt)
aws ec2 authorize-security-group-ingress --group-name XXXXX --protocol tcp --port 22 --cidr $stuff --profile xxxxx

Answer 1

此脚本将查找用密钥ssh-from-my-ip和不区分大小写的值true或标记的任何安全组yes。然后，它将撤销来自端口 22 的旧入口访问（如果有）并授权您的新 IP CIDR。它需要 aws cli 和 jq。

#! /bin/bash

# This script makes it easier to maintain security groups that allow SSH access
# from a computer with a dynamic IP, such as a computer on a home network or ISP.
#
# Using the script will allow you to SSH to an EC2 without having to allow
# access to the whole world (0.0.0.0/0). If you run this script whenever your IP
# changes then the security groups in your account specified by your AWS profile
# will be updated.
#
# The script will find any security groups for your current profile that are
# tagged with a Tag with a Key of "ssh-from-my-ip" and a case insensitive value
# of "true" or "yes".
#
# For each security group found it will revoke any existing tcp ingress on
# port 22 and authorize ingress on port 22 for your current IP.
#
# Dependencies - AWS CLI and jq


# need my current ip
MY_IP=$(curl --silent https://checkip.amazonaws.com)
echo "Your IP is ${MY_IP}"

# need security group id(s) and existing CIDR for the SG
pairs=$(aws ec2 describe-security-groups | aws ec2 describe-security-groups | jq -c '.SecurityGroups[]? | select( (.Tags[]? | select(.Key == "ssh-from-my-ip") | .Value | test("true|yes"; "i"))) | if .IpPermissions | length == 0 then {sg: .GroupId, cidr: null } else {sg: .GroupId, cidr: .IpPermissions[].IpRanges[].CidrIp} end')

for p in $pairs
do
  SG=$(echo "$p" | jq -r '.sg')
  OLD_CIDR=$(echo "$p" | jq -r '.cidr')

  echo "Updating security group ${SG}"
  if [[ $OLD_CIDR != 'null' ]]
  then
    echo "Revoking ingress permission for ${OLD_CIDR} in security group ${SG}"
    # remove the existing ingress permission
    aws ec2 revoke-security-group-ingress \
        --group-id "${SG}" \
        --protocol tcp \
        --port 22 \
        --cidr "${OLD_CIDR}"
  fi

  # authorize my new IP CIDR
  NEW_CIDR="${MY_IP}"/32
  echo "Authorizing ingress permission for ${NEW_CIDR} in security group ${SG}"
  aws ec2 authorize-security-group-ingress --group-id "${SG}" --ip-permissions '[{"IpProtocol": "tcp", "FromPort": 22, "ToPort": 22, "IpRanges": [{"CidrIp": "'"${NEW_CIDR}"'", "Description": "Rule0"}]}]'
done

Answer 2

您正在寻找的命令是modify-security-group-rules： https://docs.aws.amazon.com/cli/latest/reference/ec2/modify-security-group-rules.html

这是一个使用它的脚本。

# Update a security group rule allowing your 
# current IPv4 I.P. to connect on port 22 (SSH)

# variables to identify sec group and sec group rule
SEC_GROUP_ID='sg-xxXXxx'
SEC_GROUP_RULE_ID='sgr-xxXXxxXXxxXX'

# gets current date and prepares description for sec group rule
CURRENT_DATE=$(date +'%Y-%m-%d')
SEC_GROUP_RULE_DESCRIPTION="dynamic ip updated - ${CURRENT_DATE}"

# gets current I.P. and adds /32 for ipv4 cidr
CURRENT_IP=$(curl --silent https://checkip.amazonaws.com)
NEW_IPV4_CIDR="${CURRENT_IP}"/32

# updates I.P. and description in the sec group rule
aws ec2 modify-security-group-rules --group-id ${SEC_GROUP_ID} --security-group-rules SecurityGroupRuleId=${SEC_GROUP_RULE_ID},SecurityGroupRule="{CidrIpv4=${NEW_IPV4_CIDR}, IpProtocol=tcp,FromPort=22,ToPort=22,Description=${SEC_GROUP_RULE_DESCRIPTION}}"

# shows the sec group rule updated
aws ec2 describe-security-group-rules --filter Name="security-group-rule-id",Values="${SEC_GROUP_RULE_ID}"

Answer 3

我已经能够破解我的方法来完成这项工作。正如 John 建议的那样，我创建了另一个安全组，添加了需要访问的端口并通过 shell 脚本更新它。更新的作用是删除安全组中提到的所有规则，并使用所需的 IP 重新添加它们

源代码已发布在Github上