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[Libguestfs] [PATCH] v2v: -o rhv-upload: make -oo rhv-cafile optional



It makes little sense to require the oVirt certificate, especially when
the verification of the connection (-oo rhv-verifypeer) is disabled by
default.  The only work done with the certificate in that case is
checking that it is a valid certificate file.

Hence, make -oo rhv-cafile optional, requiring it only when
-oo rhv-verifypeer is enabled.
---
 v2v/output_rhv_upload.ml    | 16 +++++++++-------
 v2v/virt-v2v-output-rhv.pod |  2 ++
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/v2v/output_rhv_upload.ml b/v2v/output_rhv_upload.ml
index 24a289169..d08502826 100644
--- a/v2v/output_rhv_upload.ml
+++ b/v2v/output_rhv_upload.ml
@@ -28,7 +28,7 @@ open Types
 open Utils
 
 type rhv_options = {
-  rhv_cafile : string;
+  rhv_cafile : string option;
   rhv_cluster : string option;
   rhv_direct : bool;
   rhv_verifypeer : bool;
@@ -76,15 +76,13 @@ let parse_output_options options =
        error (f_"-o rhv-upload: unknown output option ‘-oo %s’") k
   ) options;
 
-  let rhv_cafile =
-    match !rhv_cafile with
-    | Some s -> s
-    | None ->
-       error (f_"-o rhv-upload: must use ‘-oo rhv-cafile’ to supply the path to the oVirt or RHV user’s ‘ca.pem’ file") in
+  let rhv_cafile = !rhv_cafile in
   let rhv_cluster = !rhv_cluster in
   let rhv_direct = !rhv_direct in
   let rhv_verifypeer = !rhv_verifypeer in
   let rhv_disk_uuids = Option.map List.rev !rhv_disk_uuids in
+  if rhv_verifypeer && rhv_cafile = None then
+     error (f_"-o rhv-upload: must use ‘-oo rhv-cafile’ to supply the path to the oVirt or RHV user’s ‘ca.pem’ file");
 
   { rhv_cafile; rhv_cluster; rhv_direct; rhv_verifypeer; rhv_disk_uuids }
 
@@ -92,6 +90,10 @@ let nbdkit_python_plugin = Config.virt_v2v_nbdkit_python_plugin
 let pidfile_timeout = 30
 let finalization_timeout = 5*60
 
+let json_optstring = function
+  | Some s -> JSON.String s
+  | None -> JSON.Null
+
 class output_rhv_upload output_alloc output_conn
                         output_password output_storage
                         rhv_options =
@@ -195,7 +197,7 @@ See also the virt-v2v-output-rhv(1) manual.")
     "output_sparse", JSON.Bool (match output_alloc with
                                 | Sparse -> true
                                 | Preallocated -> false);
-    "rhv_cafile", JSON.String rhv_options.rhv_cafile;
+    "rhv_cafile", json_optstring rhv_options.rhv_cafile;
     "rhv_cluster",
       JSON.String (Option.default "Default" rhv_options.rhv_cluster);
     "rhv_direct", JSON.Bool rhv_options.rhv_direct;
diff --git a/v2v/virt-v2v-output-rhv.pod b/v2v/virt-v2v-output-rhv.pod
index e840ca78d..04a894268 100644
--- a/v2v/virt-v2v-output-rhv.pod
+++ b/v2v/virt-v2v-output-rhv.pod
@@ -101,6 +101,8 @@ The storage domain.
 The F<ca.pem> file (Certificate Authority), copied from
 F</etc/pki/ovirt-engine/ca.pem> on the oVirt engine.
 
+This option must be specified if I<-oo rhv-verifypeer> is enabled.
+
 =item I<-oo rhv-cluster=>C<CLUSTERNAME>
 
 Set the RHV Cluster Name.  If not given it uses C<Default>.
-- 
2.21.0


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