Question

我正在为单个节点hadoop容器构建一个docker容器，我在为hadoop用户设置无密码ssh登录时遇到问题（我没有使用root来运行hadoop服务）。我一直在互联网搜索可能的修复，authorized_keys，/ .ssh等权限看起来都很好。以下是调试日志的相关部分：

debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/hdadmin/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug2: we did not send a packet, disable method
...
debug1: No more authentication methods to try.
Permission denied (publickey,password,keyboard-interactive).

尝试使用ssh之前的文件权限：

drwx------    1 hdadmin  hdadmin       4096 Feb 25 14:33 /home/hdadmin/.ssh
-rw-------    1 hdadmin  hdadmin        402 Feb 25 04:54 authorized_keys
-rw-------    1 hdadmin  hdadmin         87 Feb 25 04:54 config
-rw-------    1 hdadmin  hdadmin       1671 Feb 25 04:54 id_rsa
-rw-r--r--    1 hdadmin  hdadmin        402 Feb 25 04:54 id_rsa.pub
-rw-------    1 hdadmin  hdadmin       1637 Feb 25 04:54 known_hosts

来自dockerfile的相关代码：

RUN ... \
&& mkdir -p /home/hdadmin \
&& mkdir -p /home/hdadmin/.ssh \
&& touch /home/hdadmin/.ssh/authorized_keys \
&& touch /home/hdadmin/.ssh/config \
&& touch /home/hdadmin/.ssh/known_hosts \
&& addgroup hadoop \
&& adduser -D -g hadoop -h /home/hdadmin hdadmin -s /etc/passwd \
&& chown -R hdadmin:hdadmin /home/hdadmin \
&& chmod -R 0700 /home/hdadmin \
&& ssh-keygen -A
&& HOST_KEY="$(cat /etc/ssh/ssh_host_rsa_key.pub)" \
&& echo "127.0.0.1 ${HOST_KEY}" >> /home/hdadmin/.ssh/known_hosts \
&& echo "localhost ${HOST_KEY}" >> /home/hdadmin/.ssh/known_hosts \
&& echo "$HOSTNAME ${HOST_KEY}" >> /home/hdadmin/.ssh/known_hosts \
&& echo "0.0.0.0 ${HOST_KEY}"   >> /home/hdadmin/.ssh/known_hosts \
&& su-exec hdadmin ssh-keygen -q -N '' -t rsa -f /home/hdadmin/.ssh/id_rsa \
&& cat /home/hdadmin/.ssh/id_rsa.pub >> /home/hdadmin/.ssh/authorized_keys \
&& echo "Host *" >> /home/hdadmin/.ssh/config \
&& echo -e "\tUser hdadmin" >> /home/hdadmin/.ssh/config \
&& echo -e "\tPubKeyAuthentication yes" >> /home/hdadmin/.ssh/config \
&& echo -e "\tIdentityFile /home/hdadmin/.ssh/id_rsa" >> /home/hdadmin/.ssh/config \
&& eval $(ssh-agent) \
&& ssh-add /home/hdadmin/.ssh/id_rsa \
&& chmod 0600 /home/hdadmin/.ssh/* \
&& chmod 0644 /home/hdadmin/.ssh/*.pub \
&& /usr/sbin/sshd \
&& su-exec hdadmin ssh -vvv localhost

sshd_config文件都是默认文件，尚未修改。无法弄清楚为什么这不起作用，我想我正在做的一切正确。

编辑1：为dockerfile示例添加了更多内容。

Answer 1

所以我最终想出来了。首先，我安装了一个syslog功能，以便我可以实际查看日志消息。这是在Alpine linux上运行的，所以我在dockerfile中执行了以下操作，因此我收到了消息：

COPY init.sh /tmp/init.sh   # This sh file just contains /usr/sbin/rsyslogd -n -f /etc/rsyslog.conf & so that it runs in the background
RUN apk add --no-cache rsyslog \
&& echo "\$ModLoad inmark.so" >> /etc/rsyslog.conf \
&& echo "\$IncludeConfig /etc/rsyslog.d/*.conf" >> /etc/rsyslog.conf \
&& echo "auth,authpriv.* /var/log/auth.log" >> /etc/rsyslog.conf \
&& sed -i "s/#LogLevel.*/LogLevel DEBUG/g" /etc/ssh/sshd_config \
&& sed -i "s/#SyslogFacility.*/SyslogFacility AUTH/g" /etc/ssh/sshd_config \

一旦我这样做，我在/var/log/auth.log文件中找到了：

2018-02-25T19:23:18.942070+00:00 c97682336915 sshd[29]: User hdadmin not allowed because account is locked

我没有为帐户设置密码，因为它不会以交互方式使用。所以我先在dockerfile中设置了一个：

usermod -p '*' hdadmin

然后我收到了这些消息：

2018-02-25T19:23:18.942070+00:00 c97682336915 sshd[29]: User hdadmin not allowed because shell /etc/passwd is not executable

所以我将adduser行更改为：

&& adduser -D -g hadoop -h /home/hdadmin -s /bin/bash hdadmin \

现在一切都很好。我相信这仍然使hdadmin帐户处于无法与密码或任何交互式登录一起使用的状态，但它仍然可以通过公共密钥身份验证以编程方式使用。

Docker SSH连接到LocalHost在RUN权限被拒绝（公钥，密码，键盘交互）

1 个答案: