[PATCH v9 17/19] qemu-colo.rst: Simplify the block replication setup

[Lukas Straub <lukasstraub2@web.de>]

On the primary side we don't actually need the replication
block driver, since it only passes trough all IO.
So simplify the setup and also use 'blockdev-add' instead of
'human-monitor-command'.

This is how my clients use colo in production.

Signed-off-by: Lukas Straub <lukasstraub2@web.de>
---
 docs/system/qemu-colo.rst | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/docs/system/qemu-colo.rst b/docs/system/qemu-colo.rst
index 75abbd80298df79223cb8e70064a5dc83d70f4eb..f7d3b6439cf3401a58c412634239d1a43999a10e 100644
--- a/docs/system/qemu-colo.rst
+++ b/docs/system/qemu-colo.rst
@@ -240,8 +240,8 @@ Note:
 **4.** On Primary VM's QEMU monitor, issue command::
 
     {"execute":"qmp_capabilities"}
-    {"execute": "human-monitor-command", "arguments": {"command-line": "drive_add -n buddy driver=replication,mode=primary,file.driver=nbd,file.host=127.0.0.2,file.port=9999,file.export=parent0,node-name=replication0"}}
-    {"execute": "x-blockdev-change", "arguments":{"parent": "colo-disk0", "node": "replication0" } }
+    {"execute": "blockdev-add", "arguments": {"driver": "nbd", "node-name": "nbd0", "server": {"type": "inet", "host": "127.0.0.2", "port": "9999"}, "export": "parent0", "detect-zeroes": "on"} }
+    {"execute": "x-blockdev-change", "arguments":{"parent": "colo-disk0", "node": "nbd0" } }
     {"execute": "migrate-set-capabilities", "arguments": {"capabilities": [ {"capability": "x-colo", "state": true } ] } }
     {"execute": "migrate", "arguments": {"uri": "tcp:127.0.0.2:9998" } }
 
@@ -269,7 +269,7 @@ Primary Failover
 The Secondary died, resume on the Primary::
 
     {"execute": "x-blockdev-change", "arguments":{ "parent": "colo-disk0", "child": "children.1"} }
-    {"execute": "human-monitor-command", "arguments":{ "command-line": "drive_del replication0" } }
+    {"execute": "blockdev-del", "arguments": {"node-name": "nbd0"} }
     {"execute": "object-del", "arguments":{ "id": "comp0" } }
     {"execute": "object-del", "arguments":{ "id": "iothread1" } }
     {"execute": "object-del", "arguments":{ "id": "m0" } }
@@ -309,8 +309,8 @@ Wait until disk is synced, then::
     {"execute": "stop"}
     {"execute": "block-job-cancel", "arguments":{ "device": "resync"} }
 
-    {"execute": "human-monitor-command", "arguments":{ "command-line": "drive_add -n buddy driver=replication,mode=primary,file.driver=nbd,file.host=127.0.0.2,file.port=9999,file.export=parent0,node-name=replication0"}}
-    {"execute": "x-blockdev-change", "arguments":{ "parent": "colo-disk0", "node": "replication0" } }
+    {"execute": "blockdev-add", "arguments": {"driver": "nbd", "node-name": "nbd0", "server": {"type": "inet", "host": "127.0.0.2", "port": "9999"}, "export": "parent0", "detect-zeroes": "on"} }
+    {"execute": "x-blockdev-change", "arguments":{ "parent": "colo-disk0", "node": "nbd0" } }
 
     {"execute": "object-add", "arguments":{ "qom-type": "filter-mirror", "id": "m0", "netdev": "hn0", "queue": "tx", "outdev": "mirror0" } }
     {"execute": "object-add", "arguments":{ "qom-type": "filter-redirector", "id": "redire0", "netdev": "hn0", "queue": "rx", "indev": "compare_out" } }
@@ -341,8 +341,8 @@ Wait until disk is synced, then::
     {"execute": "stop"}
     {"execute": "block-job-cancel", "arguments":{ "device": "resync" } }
 
-    {"execute": "human-monitor-command", "arguments":{ "command-line": "drive_add -n buddy driver=replication,mode=primary,file.driver=nbd,file.host=127.0.0.1,file.port=9999,file.export=parent0,node-name=replication0"}}
-    {"execute": "x-blockdev-change", "arguments":{ "parent": "colo-disk0", "node": "replication0" } }
+    {"execute": "blockdev-add", "arguments": {"driver": "nbd", "node-name": "nbd0", "server": {"type": "inet", "host": "127.0.0.1", "port": "9999"}, "export": "parent0", "detect-zeroes": "on"} }
+    {"execute": "x-blockdev-change", "arguments":{ "parent": "colo-disk0", "node": "nbd0" } }
 
     {"execute": "object-add", "arguments":{ "qom-type": "filter-mirror", "id": "m0", "insert": "before", "position": "id=rew0", "netdev": "hn0", "queue": "tx", "outdev": "mirror0" } }
     {"execute": "object-add", "arguments":{ "qom-type": "filter-redirector", "id": "redire0", "insert": "before", "position": "id=rew0", "netdev": "hn0", "queue": "rx", "indev": "compare_out" } }

-- 
2.39.5