重启后EC2无法通过ssh访问

Question

我通过ssh连接我的ec2实例,添加新的EBS卷后,通过'sudo shutdown -r now'重启机器

然后我尝试使用follwing命令访问:

ssh -v  -i primary_key.pem ubuntu@ec2-23-22-245-160.compute-1.amazonaws.com

正在重新调整,如下所示:

OpenSSH_5.6p1, OpenSSL 0.9.8r 8 Feb 2011
debug1: Reading configuration data /Users/caveman/.ssh/config
debug1: Reading configuration data /etc/ssh_config
debug1: Applying options for *
debug1: Connecting to ec2-23-22-245-160.compute-1.amazonaws.com [23.22.245.160] port 22.
debug1: Connection established.
debug1: identity file primary_key.pem type -1
debug1: identity file primary_key.pem-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9p1 Debian-5ubuntu1
debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.6
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'ec2-23-22-245-160.compute-1.amazonaws.com' is known and matches the RSA host key.
debug1: Found key in /Users/caveman/.ssh/known_hosts:31
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: primary_key.pem
debug1: read PEM private key done: type RSA
debug1: Authentications that can continue: publickey
debug1: No more authentication methods to try.
Permission denied (publickey).

出了什么问题？我错过了什么意思？

Answer 1

这是正常的Amazon EC2行为.重新启动实例后,ec2-23-22-245-160.compute-1.amazonaws.com将更改关联的公共IP(您的).

有两种方法可以通过ssh连接你的实例

1. 登录您的Amazon AWS Console并检查正在运行的实例,然后复制Public DNS并尝试连接ssh.(ssk键是一样的)

2. 如果您不希望在每次重启/终止时更改实例的公共IP,请使用弹性IP.与帐户(而不是实例)关联的弹性Ips,因此您可以在所需的任何实例上分配Elastic Ip.

你可以用ssh连接 ssh -v -i primary_key.pem ubuntu@<ElasticIp>