Add support for DEPLOY_SSH_BATCH_MODE with default of yes.

Before this update all remote commands were bunched together and
sent to the remote host in a single SSH command.  This could result
in a very long sequence of commands that might be rejected by a
remote host (example is VMware ESXi that uses busybox sh).
With this update you can set DEPLOY_SSH_BATCH_MODE="no" and
each remote command is sent as a separate SSH call so now we
do not have big long sequence of commands.  Defaults to same
behaviour as before this update.

deploy/ssh.sh

@@ -21,6 +21,7 @@
 # export DEPLOY_SSH_FULLCHAIN=""
 # export DEPLOY_SSH_REMOTE_CMD="/etc/init.d/stunnel.sh restart"
 # export DEPLOY_SSH_BACKUP=""  # yes or no, default to yes
+# export DEPLOY_SSH_BATCH_MODE="yes"  # yes or no, default to yes
 #
 ########  Public functions #####################
 
@@ -83,7 +84,20 @@ ssh_deploy() {
   fi
   _savedomainconf Le_Deploy_ssh_backup "$Le_Deploy_ssh_backup"
 
+  # BATCH_MODE is optional. If not provided then default to yes
+  if [ "$DEPLOY_SSH_BATCH_MODE" = "no" ]; then
+    Le_Deploy_ssh_batch_mode="no"
+  elif [ -z "$Le_Deploy_ssh_batch_mode" ]; then
+    Le_Deploy_ssh_batch_mode="yes"
+  fi
+  _savedomainconf Le_Deploy_ssh_batch_mode "$Le_Deploy_ssh_batch_mode"
+  
   _info "Deploy certificates to remote server $Le_Deploy_ssh_user@$Le_Deploy_ssh_server"
+  if [ "$Le_Deploy_ssh_batch_mode" = "yes" ]; then
+    _info "Using BATCH MODE... Multiple commands sent in single call to remote host"
+  else
+    _info "Commands sent individually in multiple calls to remote host"
+  fi
 
   if [ "$Le_Deploy_ssh_backup" = "yes" ]; then
     # run cleanup on the backup directory, erase all older
@@ -96,6 +110,12 @@ then rm -rf \"\$fn\"; echo \"Backup \$fn deleted as older than 180 days\"; fi; d
     _cmdstr="mkdir -p $_backupdir; $_cmdstr"
     _info "Backup of old certificate files will be placed in remote directory $_backupdir"
     _info "Backup directories erased after 180 days."
+    if [ "$Le_Deploy_ssh_batch_mode" = "no" ]; then
+      if ! _ssh_remote_cmd "$_cmdstr"; then
+        return $_err_code
+      fi
+      _cmdstr=""
+    fi
   fi
 
   # KEYFILE is optional.
@@ -112,6 +132,12 @@ then rm -rf \"\$fn\"; echo \"Backup \$fn deleted as older than 180 days\"; fi; d
     # copy new certificate into file.
     _cmdstr="$_cmdstr echo \"$(cat "$_ckey")\" > $Le_Deploy_ssh_keyfile;"
     _info "will copy private key to remote file $Le_Deploy_ssh_keyfile"
+    if [ "$Le_Deploy_ssh_batch_mode" = "no" ]; then
+      if ! _ssh_remote_cmd "$_cmdstr"; then
+        return $_err_code
+      fi
+      _cmdstr=""
+    fi
   fi
 
   # CERTFILE is optional.
@@ -132,6 +158,12 @@ then rm -rf \"\$fn\"; echo \"Backup \$fn deleted as older than 180 days\"; fi; d
     # copy new certificate into file.
     _cmdstr="$_cmdstr echo \"$(cat "$_ccert")\" $_pipe $Le_Deploy_ssh_certfile;"
     _info "will copy certificate to remote file $Le_Deploy_ssh_certfile"
+    if [ "$Le_Deploy_ssh_batch_mode" = "no" ]; then
+      if ! _ssh_remote_cmd "$_cmdstr"; then
+        return $_err_code
+      fi
+      _cmdstr=""
+    fi
   fi
 
   # CAFILE is optional.
@@ -153,6 +185,12 @@ then rm -rf \"\$fn\"; echo \"Backup \$fn deleted as older than 180 days\"; fi; d
     # copy new certificate into file.
     _cmdstr="$_cmdstr echo \"$(cat "$_cca")\" $_pipe $Le_Deploy_ssh_cafile;"
     _info "will copy CA file to remote file $Le_Deploy_ssh_cafile"
+    if [ "$Le_Deploy_ssh_batch_mode" = "no" ]; then
+      if ! _ssh_remote_cmd "$_cmdstr"; then
+        return $_err_code
+      fi
+      _cmdstr=""
+    fi
   fi
 
   # FULLCHAIN is optional.
@@ -175,6 +213,12 @@ then rm -rf \"\$fn\"; echo \"Backup \$fn deleted as older than 180 days\"; fi; d
     # copy new certificate into file.
     _cmdstr="$_cmdstr echo \"$(cat "$_cfullchain")\" $_pipe $Le_Deploy_ssh_fullchain;"
     _info "will copy fullchain to remote file $Le_Deploy_ssh_fullchain"
+    if [ "$Le_Deploy_ssh_batch_mode" = "no" ]; then
+      if ! _ssh_remote_cmd "$_cmdstr"; then
+        return $_err_code
+      fi
+      _cmdstr=""
+    fi
   fi
 
   # REMOTE_CMD is optional.
@@ -186,17 +230,20 @@ then rm -rf \"\$fn\"; echo \"Backup \$fn deleted as older than 180 days\"; fi; d
   if [ -n "$Le_Deploy_ssh_remote_cmd" ]; then
     _cmdstr="$_cmdstr $Le_Deploy_ssh_remote_cmd;"
     _info "Will execute remote command $Le_Deploy_ssh_remote_cmd"
+    if [ "$Le_Deploy_ssh_batch_mode" = "no" ]; then
+      if ! _ssh_remote_cmd "$_cmdstr"; then
+        return $_err_code
+      fi
+      _cmdstr=""
+    fi
   fi
 
-  if [ -z "$_cmdstr" ]; then
-    _err "No remote commands to excute. Failed to deploy certificates to remote server"
-    return 1
+  # if running as batch mode then all commands sent in a single SSH call now...
+  if [ -n "$_cmdstr" ]; then
+    if ! _ssh_remote_cmd "$_cmdstr"; then
+      return $_err_code
+    fi
   fi
-
-  if ! _ssh_remote_cmd "$_cmdstr"; then
-    return $_err_code
-  fi
-
   return 0
 }