☰

当 apt-get 完成时，通过 ssh 运行的非交互式脚本被中断

tag-icon • tag-icon shell-script apt system-installation lxc
当 apt-get 完成时，通过 ssh 运行的非交互式脚本被中断

当我在 Ubuntu Server 13.04 上运行以下非交互式脚本时，它会被中断：lxc-docker包完成安装。

脚本 ：

ssh -o StrictHostKeychecking=no -t -t -i $CERT $USER@$SERVER <<'ENDSSH'

sudo DEBIAN_FRONTEND=noninteractive apt-get -y install software-properties-common
sudo DEBIAN_FRONTEND=noninteractive add-apt-repository -y ppa:dotcloud/lxc-docker
sudo DEBIAN_FRONTEND=noninteractive apt-get -y update
sudo DEBIAN_FRONTEND=noninteractive apt-get -y install lxc-docker

echo "some other actions here..."

exit #SSH session

ENDSSH
exit

一切似乎都很好，但脚本在输出中的这一行之后被中断：

Processing triggers for ureadahead ...

1）为什么会发生这种情况？我怎样才能防止这种情况发生？

2) 如果没有，我如何检测 ssh 会话是否已成功完成？

安装的最后几行（缩短）：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  bridge-utils bsdtar cgroup-lite debootstrap dnsmasq-base libapparmor1
  libarchive13 libcap2-bin liblxc0 liblzo2-2 libnetfilter-conntrack3
  libnettle4 libpam-cap libseccomp1 lxc lxc-templates python3-lxc
Suggested packages:
  bsdcpio lrzip libcap-dev btrfs-tools lvm2 lxctl qemu-user-static
The following NEW packages will be installed:
  bridge-utils bsdtar cgroup-lite debootstrap dnsmasq-base libapparmor1
  libarchive13 libcap2-bin liblxc0 liblzo2-2 libnetfilter-conntrack3
  libnettle4 libpam-cap libseccomp1 lxc lxc-docker lxc-templates python3-lxc
0 upgraded, 18 newly installed, 0 to remove and 29 not upgraded.
Need to get 2,495 kB of archives.
After this operation, 8,742 kB of additional disk space will be used.
Get:1 http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ raring/main liblzo2-2 amd64 2.06-1build1 [53.2 kB]
Get:2 http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ raring/main libnettle4 amd64 2.4-3 [94.7 kB]
.
.
.
.
.
.
Setting up libnetfilter-conntrack3:amd64 (1.0.1-1) ...
Setting up dnsmasq-base (2.65-1ubuntu1) ...
Setting up python3-lxc (0.9.0-0ubuntu3.2) ...
Setting up lxc (0.9.0-0ubuntu3.2) ...
lxc start/running
Setting up lxc dnsmasq configuration.
Setting up bsdtar (3.1.2-5ubuntu1) ...
Setting up libcap2-bin (1:2.22-1.2ubuntu2) ...
Setting up libpam-cap:amd64 (1:2.22-1.2ubuntu2) ...
Setting up cgroup-lite (1.8) ...
cgroup-lite start/running
Setting up debootstrap (1.0.46ubuntu1) ...
Processing triggers for ureadahead ...
Setting up lxc-docker (0.4.0-1) ...
docker start/running, process 2444
Setting up lxc-templates (0.9.0-0ubuntu3.2) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
Processing triggers for ureadahead ...

答案1

只是为了说明明显的情况（作为解决方法，而不是正确的解决方案），也许尝试将脚本发送到服务器，然后执行脚本...？

$ cat<<ENDSSH > /tmp/tmp.sh
sudo DEBIAN_FRONTEND=noninteractive apt-get ...
sudo DEBIAN_FRONTEND=noninteractive apt-get -y install lxc-docker
echo "some other actions here..."
exit
ENDSSH

进而，

$ scp  /tmp/tmp.sh ${USER}@${SERVER}:/tmp/tmp.sh \
  && ssh $USER@$SERVER 'chmod u+x /tmp/tmp.sh && /tmp/tmp.sh; rm /tmp/tmp.sh'

如果这也终止，则远程命令可能必须在后台运行，断开连接，然后使用另一个 ssh 命令来检查执行脚本的结果。

相关内容