I am trying to understand how to correctly setup Guacamole... and failing.
Question is: how am I supposed to troubleshoot connection problems in
Dockerized Guacamole?
All documentation I found (pointers welcome) deal with standard installation
(non-dockerized, direct editing of guacamole.properties and user-mapping.xml)
and I simply do not know where to look to understand where I goofed.
Some installation details follow.
I installed Guacamole using Docker containers essentially as follows:
docker run --name mcon-guacd -d guacamole/guacd
docker run --rm guacamole/guacamole /opt/guacamole/bin/initdb.sh --mysql >
initdb.sql
readonly db_user=guacamole
readonly db_name=guacamole
readonly db_pass=SecurePassword
readonly db_root=MoreSecurePassword
mysql --user=mcon --password="${db_root}" <<_EOF_
DROP USER IF EXISTS ${db_user};
DROP DATABASE IF EXISTS ${db_name};
CREATE DATABASE ${db_name};
GRANT ALL ON ${db_name}.* TO '${db_user}'@'%' IDENTIFIED BY '${db_pass}';
FLUSH PRIVILEGES;
_EOF_
mysql --user=${db_user} --password="${db_pass}" ${db_name} <initdb.sql
docker run --name mcon-guacamole --link mcon-guacd:guacd \
-e MYSQL_HOSTNAME=$(ip route get 1 | sed -n 's/^.*src \([0-9.]*\)
.*$/\1/p') \
-e MYSQL_DATABASE=${db_name} \
-e MYSQL_USER=${db_user} \
-e "MYSQL_PASSWORD=${db_pass}" \
-d -p 8080:8080 guacamole/guacamole
I had to allow connections from the net to my mariadb server and also install
nginx
reverse proxy to access the container from outside; I can provide details but I
don't
think this is the problem.
I can log into Guacamole and use administrative login to setup users (one in
particular,
the one I'm using for tesing, has full admin rights) and I'm trying to setup
connections.
I was able to share localhost desktop via xrdp, so I'm reasonably sure basics
are OK.
I also tried to setup a ssh connection to a nearby machine.
To keep things simple I filled only a few fields:
EDIT CONNECTION
Name (sb001)
Protocol (SSH)
PARAMETERS
Network
Hostname (192.168.2.211)
Problem:
When I try to connect there's a very long initial delay (probably a net
timeout) displaying:
Connected to Guacamole. Waiting for response...
then I see the Login as: prompt but when I type my username echo stops after
exactly 7 chars (username is 11 chars long) and just sits there. When I
(blindly) hit Return I get a box with the following message:
An internal error has occurred within the Guacamole server,
and the connection has been terminated.
If the problem persists, please notify your system administrator,
or check your system logs.
Unfortunately I am the "system administrator" and I cannot find any relevant
log;
specifically using :
docker logs mcon-guacamole
does not show any sign of attempted connection and I don't know how to debug
this.
I checked and I can correctly ssh to given machine both from host (where docker
runs)
and from the container (i.e.: from within: "docker exec -it mcon-guacamole
/bin/bash").
I also tried installing on my local development machine.
Same basic installation but no nginx reverse proxy.
I get "almost" the same behavior with it:
difference is when trying connection (to the same host) I immediately get the:
An internal error...
message; no wait and no Login as:.
Definitely I'm missing something :(
If someone can point me in the right direction...
Thanks in Advance
Mauro
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