From 5a7539b7d4ebdf4a43e0125ada58f65595ea20a6 Mon Sep 17 00:00:00 2001
From: Silvio Rhatto <rhatto@riseup.net>
Date: Fri, 17 Feb 2017 08:58:35 -0200
Subject: Deploy: check for passwordless connections and show a sample sudoers
 config

---
 share/hydra/deploy | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/share/hydra/deploy b/share/hydra/deploy
index d8fd3f8..d3fc513 100755
--- a/share/hydra/deploy
+++ b/share/hydra/deploy
@@ -113,11 +113,26 @@ for node in $NODES; do
     # Setup deploy environment
     hydra_deploy_setup remote $node || continue
 
+    # Check for passwordless connections
+    # http://stackoverflow.com/questions/3830508/check-if-passwordless-access-has-been-setup#3830680
+    if ! $HYDRA_CONNECT -o NumberOfPasswordPrompts=0 $FQDN true; then
+      echo "Unable to connect to $FQDN via SSH without a password."
+      echo "Please set a passwordless login for your user at $FQDN using public key auth."
+      exit 1
+    fi
+
     # Check remote environment
     $HYDRA_CONNECT $FQDN <<EOF
     ##### BEGIN REMOTE SCRIPT #####
+    # Check for passwordless sudo
+    # See references like https://raymii.org/s/articles/Check_if_passwordless_sudo_can_be_used_in_a_bash_script_or_nagios_check.html
     if ! sudo -n true; then
       echo "Please set passwordless sudo on $FQDN."
+      echo "You can do that by adding the following line on /etc/sudoers.d/local:"
+      echo ""
+      echo "%sudo ALL=NOPASSWD: ALL"
+      echo ""
+      echo "And make sure your user is included in the 'sudo' group."
       exit 1
     fi
 
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