Concerning the problem with "control", I've been able to add "control" to the classpath by doing that, thanks to aerogear-push/env/OPENSHIFT_AEROGEAR_PATH_ELEMENT :
# rhc ssh aerogearbkp
# cd aerogear-push/bin
# ln -sf `pwd`/control tools/
----------------------------------------------------------
Yet "rhc snapshot-save" still does not work.
----------------------------------------------------------
I've extracted the interesting part from sshing the gear in verbose mode to do the snapshot :
# ssh -vvv my-uuid@aerogearbkp-mydomain.rhcloud.com 'snapshot' > aerogearbkp.tar.gz
[... verbose initiating the connection ...]
Authenticated to aerogearbkp-mydomain.rhcloud.com ([${IP}]:22).
debug2: fd 6 setting O_NONBLOCK
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug2: callback start
debug2: fd 3 setting TCP_NODELAY
debug3: packet_set_tos: set IP_TOS 0x08
debug2: client_session2_setup: id 0
debug1: Sending environment.
debug3: Ignored env Apple_PubSub_Socket_Render
debug3: Ignored env CMD_DURATION
debug3: Ignored env COLORFGBG
debug3: Ignored env DISPLAY
debug3: Ignored env HOME
debug3: Ignored env ITERM_PROFILE
debug3: Ignored env ITERM_SESSION_ID
debug1: Sending env LC_CTYPE = UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env LOGNAME
debug3: Ignored env PATH
debug3: Ignored env PWD
debug3: Ignored env SHELL
debug3: Ignored env SHLVL
debug3: Ignored env SSH_AUTH_SOCK
debug3: Ignored env TERM
debug3: Ignored env TERM_PROGRAM
debug3: Ignored env TMPDIR
debug3: Ignored env USER
debug3: Ignored env __CF_USER_TEXT_ENCODING
debug3: Ignored env __CHECKFIX1436934
debug3: Ignored env __fish_bin_dir
debug3: Ignored env __fish_datadir
debug3: Ignored env __fish_help_dir
debug3: Ignored env __fish_sysconfdir
debug1: Sending command: snapshot
debug2: channel 0: request exec confirm 1
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel 0: rcvd adjust 2097152
debug2: channel_input_status_confirm: type 99 id 0
debug2: exec request accepted on channel 0
debug2: channel 0: rcvd ext data 490
/opt/rh/ruby193/root/usr/share/gems/gems/openshift-origin-node-1.36.3/lib/openshift-origin-node/model/v2_cart_model.rb:1380:in `block in do_control_with_directory': CLIENT_ERROR: Failed to execute: 'control pre-snapshot' for /var/lib/openshift/${MY_UUID}/aerogear-push (OpenShift::Runtime::Utils::ShellExecutionException)
from /opt/rh/ruby193/root/usr/share/gems/gems/openshift-origin-node-1.36.3/lib/openshift-origin-node/model/v2_cart_model.rb:1170:in `process_cartridges'
debug2: channel 0: written 490 to efd 7
debug2: channel 0: rcvd ext data 2206
from /opt/rh/ruby193/root/usr/share/gems/gems/openshift-origin-node-1.36.3/lib/openshift-origin-node/model/v2_cart_model.rb:1343:in `do_control_with_directory'
from /opt/rh/ruby193/root/usr/share/gems/gems/openshift-origin-node-1.36.3/lib/openshift-origin-node/model/v2_cart_model.rb:1192:in `do_control'
from /opt/rh/ruby193/root/usr/share/gems/gems/openshift-origin-node-1.36.3/lib/openshift-origin-node/model/application_container_ext/snapshots.rb:69:in `block in snapshot'
from /opt/rh/ruby193/root/usr/share/gems/gems/openshift-origin-node-1.36.3/lib/openshift-origin-node/model/v2_cart_model.rb:84:in `block in each_cartridge'
from /opt/rh/ruby193/root/usr/share/gems/gems/openshift-origin-node-1.36.3/lib/openshift-origin-node/model/v2_cart_model.rb:1176:in `block in process_cartridges'
from /opt/rh/ruby193/root/usr/share/gems/gems/openshift-origin-node-1.36.3/lib/openshift-origin-node/model/v2_cart_model.rb:1174:in `each'
from /opt/rh/ruby193/root/usr/share/gems/gems/openshift-origin-node-1.36.3/lib/openshift-origin-node/model/v2_cart_model.rb:1174:in `process_cartridges'
from /opt/rh/ruby193/root/usr/share/gems/gems/openshift-origin-node-1.36.3/lib/openshift-origin-node/model/v2_cart_model.rb:82:in `each_cartridge'
from /opt/rh/ruby193/root/usr/share/gems/gems/openshift-origin-node-1.36.3/lib/openshift-origin-node/model/application_container_ext/snapshots.rb:68:in `snapshot'
from /usr/bin/gear:582:in `block (2 levels) in <main>'
from /opt/rh/ruby193/root/usr/share/gems/gems/commander-4.0.3/lib/commander/command.rb:180:in `call'
from /opt/rh/ruby193/root/usr/share/gems/gems/commander-4.0.3/lib/commander/command.rb:180:in `call'
from /opt/rh/ruby193/root/usr/share/gems/gems/commander-4.0.3/lib/commander/command.rb:155:in `run'
from /opt/rh/ruby193/root/usr/share/gems/gems/commander-4.0.3/lib/commander/runner.rb:385:in `run_active_command'
from /opt/rh/ruby193/root/usr/share/gems/gems/commander-4.0.3/lib/commander/runner.rb:62:in `run!'
from /opt/rh/ruby193/root/usr/share/gems/gems/commander-4.0.3/lib/commander/delegates.rb:11:in `run!'
from /opt/rh/ruby193/root/usr/share/gems/gems/commander-4.0.3/lib/commander/import.rb:10:in `block in <top (required)>'
[ ... verbose stuff ending connection ... ]
debug1: Exit status 1
Notes : while doing the manual ssh snapshot trial, I have in my "rhc tail" output this that is beeing added :
/usr/bin/tail: aerogear-push/logs/migration.log: file truncated
Unexpected error running Liquibase: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
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