Original post is here: eklausmeier.goip.de
One simple way to get rid of the very short timeout in shell access to OpenShift is to unset the TMOUT environment variable:
1unset TMOUT
Before I knew that I used an Expect script. Below Expect script defeats the annoying timeout by sending some text every 60 seconds.
[more_WP_Tag]
1#!/usr/bin/expect
2# Defeat OpenShift timeout in ssh access
3
4set user <your user>
5set domain <your domain>
6set timeout -1
7
8spawn ssh -i $::env(HOME)/.ssh/id_rsa_openshift $user@$domain.rhcloud.com
9expect "\[$domain.rhcloud.com $user\]\\>"
10
11send "set -o vi\n"
12send "alias l='ls -aCF'; alias ll='ls -alF'; alias ..='cd ..'; alias ...='cd ../..'; alias p='ps -fu \$UID'; alias li=less; alias v=vi\n"
13send "unset TMOUT\n"
14
15interact timeout 60 {send "# Still alive\n"}
Noting that OpenShift doesn't cost you a dime, you get a quite powerful machine. Below is the CPU configuration.
$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz
stepping : 7
cpu MHz : 1800.000
cache size : 20480 KB
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu de tsc msr pae cx8 sep cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm rep_good aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes hypervisor lahf_lm arat epb xsaveopt pln pts dts
bogomips : 3600.00
clflush size : 64
cache_alignment : 64
address sizes : 46 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz
stepping : 7
cpu MHz : 1800.000
cache size : 20480 KB
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu de tsc msr pae cx8 sep cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm rep_good aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes hypervisor lahf_lm arat epb xsaveopt pln pts dts
bogomips : 3600.00
clflush size : 64
cache_alignment : 64
address sizes : 46 bits physical, 48 bits virtual
power management:
This is the operating system:
$ lsb_release -a
LSB Version: :base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch
Distributor ID: RedHatEnterpriseServer
Description: Red Hat Enterprise Linux Server release 6.5 (Santiago)
Release: 6.5
Codename: Santiago
This is the kernel version:
$ uname -a
Linux ex-std-node258.prod.rhcloud.com 2.6.32-431.11.2.el6.bz844450.x86_64 #1 SMP Mon Mar 31 11:32:14 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux
Pinging the server reveals that the OpenShift servers are actually hosted by Amazon Web Services.
$ ping -c2 <domain>.rhcloud.com
PING ec2-54-224-157-36.compute-1.amazonaws.com (54.224.157.36) 56(84) bytes of data.
64 bytes from ec2-54-224-157-36.compute-1.amazonaws.com (54.224.157.36): icmp_seq=1 ttl=38 time=174 ms
64 bytes from ec2-54-224-157-36.compute-1.amazonaws.com (54.224.157.36): icmp_seq=2 ttl=38 time=172 ms