The readiness probe wrapped the remote command in raw double quotes with
manually backslash-escaped inner quotes. shell_exec() runs its command
through an extra local `sh -c` layer beyond the ssh invocation itself, and
because the remote command was double-quoted (not single-quoted/opaque),
that extra local layer expanded the $(...)/${...} substitutions using
HOST1's own environment before ssh ever sent anything to the remote host.
Confirmed live: the exact same command run directly (one shell layer)
returned the correct remote SCRIPTS_DIR; run through an extra sh -c layer
(matching shell_exec's real behavior) it silently evaluated everything
against HOST1's local varaverk.cfg instead, producing an empty probe result
every time — so every push silently reported "plugin not installed" even
though HOST2 was fully installed and reachable.
Fix: build the remote command as a plain string and escapeshellarg() it as
a whole, same pattern vv_pt_ssh() already used safely elsewhere. Verified
live — probe now returns HOST2's real SCRIPTS_DIR and the master.conf push
lands with a matching checksum on both hosts.
Gmer4Lfe
3d7b15d6bb