Nomad exec terminal editor

Nomad
1

Using exec allows me to run commands within an allocation. This is very handy.

[my-laptop] $ nomad job allocs job-name
> alloc id: abcd1234

[my-laptop] $ nomad alloc exec -task app abcd1234 /bin/bash

[nomad-alloc] $

However, if I try to open an editor via the exec environment, I am unable.

[nomad-alloc] $ nano
Error opening terminal: vt100.

Is it possible to run an editor via the exec command?

2

Hi, I just tested raw_exec, exec and docker and I can run nano, vim on all of them started from interactive login and non-login shell.

Something to notice is that TERM changes for me between drivers:

driver TERM
docker xterm
exec dumb
raw_exec dumb

The error suggests that ncurses is not able to find terminal definitions somewhere in /usr/share/terminfo/ or /home/<USER>/.terminfo. Debug it normally, run nano it under strace and see what it tries to access. There are ncurses has also it’s own debugging.

Guessing, because exec driver does some mounts, I would guess you have to run a login shell on your system and it initlialized TERMINFO (or TERMINFO_DIRS) specially, or the directory with terminfo is not available inside exec environment.

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