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snapmirror relationship group type, missing in rest

RobertSimac

Hello team,

In REST apis, the snapmirror relationship group type is no longer existing. (https://docs.netapp.com/us-en/ontap-restmap-98/snapmirror.html#snapmirror-get)

Some of our code relies on checking if the snapmirror relations group type is 'vserver'.

I did some prototyping and testing and confirmed the rest apis, when getting the entire snapmirror relationship collection for given source volume do NOT return the `vserver` relationships - which is good for our use case.

Our current/old code using ontapis/zapis do return all group types relationships and code does skip the 'vserver' ones...

I wanted to check with this group if my testing and assumption is safe to use in production.

Can I safely assume rest apis will not return any relationships with 'vserver' group type? Can the ontap-restmap document be updated to reflect this fact?

Thanks

Robert Simac

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Accepted answers

RobertBlackhart

I looked at the REST documentation for the relationships endpoint: https://library.netapp.com/ecmdocs/ECMLP2882307/html/index.html#/snapmirror/snapmirror_relationship_get.

It looks like the group_type field was added in ONTAP 9.11.1:

The mapping document doesn't seem like it was updated to say that this is the equivalent to the relationship-group-type attribute though. You can submit a request to have the mapping document updated by going to the "let us know" link from this page: https://docs.netapp.com/us-en/ontap-restmap-98/overview.html

All comments

RobertBlackhart

I looked at the REST documentation for the relationships endpoint: https://library.netapp.com/ecmdocs/ECMLP2882307/html/index.html#/snapmirror/snapmirror_relationship_get.

It looks like the group_type field was added in ONTAP 9.11.1:

RobertSimac

Thanks Robert that is useful info. Unfortunately our production is currently at ontap 9.7 and will take a while to get it up to date with 9.11.

I did additional testing on 9.7 and confirmed the new REST apis do NOT return any `svm_dr` or `vserver` relationships when queried by `destination_path` like this . Note below query returns only two relationships, to vservers devzzy and devzzz

curl --insecure --user user:pass "https://devcd1/api/snapmirror/relationships/?list_destinations_only=true&destination.path=RSSIMPLE&fields=destination,source"

{
"records": [
{
"uuid": "d03f4484-540e-11ec-be53-00a098d065b0",
"source": {
"path": "devcd1:RSSIMPLE",
"svm": {
"uuid": "dadfc8e4-478c-11e8-a818-00a098d480e5",
"name": "devcd1",
"_links": {
"self": {
"href": "/api/svm/svms/dadfc8e4-478c-11e8-a818-00a098d480e5"
}
}
}
},
"destination": {
"path": "devzzy:RSSIMPLE",
"svm": {
"uuid": "781b0694-52db-11e8-81cb-00a098d480f3",
"name": "devzzy",
"_links": {
"self": {
"href": "/api/svm/peers/f110ec2b-52dc-11e8-81cb-00a098d480f3"
}
}
},
"cluster": {
"name": "rt1mgb-stor",
"uuid": "eaa185de-c94d-11eb-a271-00a098997e7f",
"_link": {
"self": {
"href": "/api/cluster/peers/eaa185de-c94d-11eb-a271-00a098997e7f"
}
}
}
},
"_links": {
"self": {
"href": "/api/snapmirror/relationships/d03f4484-540e-11ec-be53-00a098d065b0/?list_destinations_only=true"
}
}
},
{
"uuid": "d2ebc59d-4ec1-11eb-8c5c-00a098d065b0",
"source": {
"path": "devcd1:RSSIMPLE",
"svm": {
"uuid": "dadfc8e4-478c-11e8-a818-00a098d480e5",
"name": "devcd1",
"_links": {
"self": {
"href": "/api/svm/svms/dadfc8e4-478c-11e8-a818-00a098d480e5"
}
}
}
},
"destination": {
"path": "devzzz:RSSIMPLE",
"svm": {
"uuid": "bc0a9645-4d6f-11e8-a818-00a098d480e5",
"name": "devzzz",
"_links": {
"self": {
"href": "/api/svm/peers/a6acfcf6-4eeb-11e8-81cb-00a098d480f3"
}
}
},
"cluster": {
"name": "rt1mgb-stor",
"uuid": "eaa185de-c94d-11eb-a271-00a098997e7f",
"_link": {
"self": {
"href": "/api/cluster/peers/eaa185de-c94d-11eb-a271-00a098997e7f"
}
}
}
},
"_links": {
"self": {
"href": "/api/snapmirror/relationships/d2ebc59d-4ec1-11eb-8c5c-00a098d065b0/?list_destinations_only=true"
}
}
}
],
"num_records": 2,
"_links": {
"self": {
"href": "/api/snapmirror/relationships/?list_destinations_only=true&destination.path=RSSIMPLE&fields=destination,source"
}
}

Note above volume RSSIMPLE volume does have svm dr (vserver) relationship when queried by ontap CLI like this. Note the destination path vserver is devcd1_SVMDR, not returned in above rest api output...

devcd1::> snapmirror list-destinations -destination-path RSSIMPLE
              Source Path: devcd1:RSSIMPLE
         Destination Path: devcd1_SVMDR:RSSIMPLE
        Relationship Type: XDP
  Relationship Group Type: vserver
   SnapMirror Policy Type: async-mirror
      Relationship Status: Idle
        Transfer Progress: -
    Progress Last Updated: -
       Source Volume Node: dev-stor-01
          Relationship ID: c6e59f45-2799-11ec-b628-00a098997ee7

While above 'works for me'... I would still like to hear some words of confirmation / encouragement or reference to the document stating the REST querying by destination path will return only normal snapmirror relationships, not the SVM DR ones, at least on ontap 9.7..

RobertBlackhart

I understand what you're looking for and that's a reasonable ask. I don't see it explicitly stated in the documentation though and I don't have enough expertise on the feature to know. You may want to reach out to support to try and get a more detailed answer from an expert on snapmirror.