启了个 docker 容器, 开启了 ssh 登录，过一天后重新登录，密码不对是咋回事

V2EX = way to explore

V2EX 是一个关于分享和探索的地方

现在注册

已注册用户请登录

› Boot2docker

这是一个创建于 1272 天前的主题，其中的信息可能已经有所发展或是发生改变。

docker build 的镜像，ssh 的密码在 build 的时候设置的，非常奇怪是的，容器启动后，正常可以用 ssh 登录，但过一天后，新开窗口重新 ssh 登录，密码就不对了，而且昨天开的已登录窗口还能正常使用。重启 docke 容器后，又能正常登录，是啥原因啊? 没有人改密码啊，好几天都是这样，都是通过重启容器来解决，不清楚原因是啥

第 1 条附言 · 2021-06-02 18:59:12 +08:00

# Dockerfile
FROM base_images:latest
RUN apt-get -y update && apt-get install -y openssh-server openssh-client vim initscripts expect

RUN pip install --upgrade pip 
RUN sed -i "s/^#PermitRootLogin/PermitRootLogin/g" /etc/ssh/sshd_config
RUN sed -i "s/prohibit-password/yes/g" /etc/ssh/sshd_config
RUN echo y | ssh-keygen -q -t rsa -b 2048 -f /etc/ssh/ssh_host_rsa_key -N ''
RUN echo y | ssh-keygen -q -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key -N ''
RUN echo y | ssh-keygen -t dsa -f /etc/ssh/ssh_host_ed25519_key -N ''
ARG PASSWORD
RUN echo "root:${PASSWORD}" | chpasswd
RUN mkdir /var/run/sshd && chmod 0755 /var/run/sshd
RUN env | egrep -v "^(HOME=|USER=|MAIL=|LC_ALL=|LS_COLORS=|LANG=|HOSTNAME=|PWD=|TERM=|SHLVL=|LANGUAGE=|_=)" >> /etc/environment
CMD /usr/sbin/sshd -D && bash

build 指令：

docker-compose build --build-arg PASSWORD=admin%^&* myproject &&
docker-compose up -d

ssh

容器

密码

11 条回复 • 2021-06-04 10:22:53 +08:00

maichael

2021-06-02 16:12:27 +08:00

"重启 docker 容器后，又能正常登录"，因为 Docker 是无状态的，重启之后会回归刚开始的状态。所以应该是你容器内的某个设置会进行更改密码，可以给下 Dockerfile 关键信息吗

css3

2021-06-02 18:59:25 +08:00

@maichael 贴上了 Dockerfile

PbCopy111

2021-06-02 20:33:36 +08:00

这。。。不是每次生成新密码么。。。。。

css3

2021-06-02 22:14:29 +08:00 via iPhone

@PbCopy111 build 指定的

killva4624

2021-06-03 10:44:21 +08:00

1 、ssh 的时候具体报错是什么？（可以用 -v 打印出来）
2 、“重启容器”的具体操作是什么？ docker restart xxx 吗，还是每次都重新 build ？看 Dockerfile，如果不重新 build 的话，这个 image 的 sshpassword 是不会变的。

css3

2021-06-03 12:03:00 +08:00 via iPhone

@killva4624 隔天 ssh 登录就是提示密码不正确

css3

2021-06-03 12:03:49 +08:00 via iPhone

@killva4624 肯定不是 build 啊，直接 restart，或者直接 run

css3

2021-06-03 13:06:02 +08:00

@killva4624 Permission denied, please try again.

css3

2021-06-03 13:09:49 +08:00

OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 58: Applying options for *
debug1: Connecting to 192.168.12.44 [192.168.12.44] port 23.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 Ubuntu-4ubuntu2.10
debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu2.10 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 192.168.12.44:23 as 'root'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: [email protected]
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: [email protected] need=64 dh_need=64
debug1: kex: [email protected] need=64 dh_need=64
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:jI6QVVi6Qmi5oZvugssXrHN4Qxjrw9BDNoowxaIZ7so
debug1: Host '[192.168.12.44]:23' is known and matches the ECDSA host key.
debug1: Found key in /root/.ssh/known_hosts:4
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /root/.ssh/id_rsa
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /root/.ssh/id_dsa
debug1: Trying private key: /root/.ssh/id_ecdsa
debug1: Trying private key: /root/.ssh/id_ed25519
debug1: Next authentication method: password
[email protected]'s password:
debug1: Authentications that can continue: publickey,password
Permission denied, please try again.
[email protected]'s password:

julyclyde

2021-06-03 16:24:14 +08:00

docker exec 进去看看 sshd 的日志吧

killva4624

2021-06-04 10:22:53 +08:00

@css3 出 Permission denied 的时候，docker exec 进去看看你的 /etc/ssh/sshd_config，还有 sshd 的日志。