# RPC replace-config-with-snapshot

The RPC replaces the nodes in UniConfig topology in the CONFIG datastore with selected nodes from specified snapshot. The RPC input contains the name of the snapshot topology and the target nodes which should replace the UniConfig nodes in the CONFIG datastore. Output of the RPC describes the result of the operation and matches all input nodes. You cannot call an RPC with empty target-nodes. If one node failed for any reason, RPC will be fail entirely.

# RPC Examples

# Successful Example

RPC input contains the name of the snapshot topology which should replace nodes from UniConfig topology in the CONFIG datastore and list of nodes from that snapshot. RPC output contains the result of the operation.

RPC Request
curl --location --request POST 'http://localhost:8181/rests/operations/snapshot-manager:replace-config-with-snapshot' \
--header 'Accept: application/json' \
--header 'Content-Type: application/json' \
--data-raw '{
    "input": {
        "name" : "snapshot1",
        "target-nodes": {
            "node": ["IOSXR","IOSXRN"]
        }
    }
}'

RPC Response, Status: 200

# Failed Example

RPC input contains the name of the snapshot topology which should replace nodes from UniConfig topology in the CONFIG datastore and list of nodes from that snapshot. The snapshot with name (snapshot2) has not been created yet. RPC output contains the result of the operation.

RPC Request
curl --location --request POST 'http://localhost:8181/rests/operations/snapshot-manager:replace-config-with-snapshot' \
--header 'Accept: application/json' \
--header 'Content-Type: application/json' \
--data-raw '{
    "input": {
        "name" : "snapshot2",
        "target-nodes": {
            "node": ["IOSXR"]
        }
    }
}'

RPC Response, Status: 404
{
    "errors": {
        "error": [
            {
                "error-tag": "missing-element",
                "error-info": {
                    "node-id": "IOSXR"
                },
                "error-type": "application",
                "error-message": "Snapshot with name 'snapshot2' does not exist."
            }
        ]
    }
}

# Failed Example

RPC input contains the name of the snapshot topology which should replace nodes from UniConfig topology in the CONFIG datastore and list of nodes from that snapshot. The snapshot name is missing in the RPC input. The RPC output contains the result of the operation.

RPC Request
curl --location --request POST 'http://localhost:8181/rests/operations/snapshot-manager:replace-config-with-snapshot' \
--header 'Accept: application/json' \
--header 'Content-Type: application/json' \
--data-raw '{
    "input": {
        "target-nodes": {
            "node": ["IOSXR"]
        }
    }
}'

RPC Response, Status: 400
{
    "errors": {
        "error": [
            {
                "error-tag": "missing-element",
                "error-type": "application",
                "error-message": "Snapshot name cannot be empty. "
            }
        ]
    }
}

# Failed Example

RPC input contains the name of the snapshot topology which should replace nodes from UniConfig topology in the CONFIG datastore and list of nodes from that snapshot. One node is missing in snapshot1 (IOSXRN). RPC output contains the result of the operation.

RPC Request
curl --location --request POST 'http://localhost:8181/rests/operations/snapshot-manager:replace-config-with-snapshot' \
--header 'Accept: application/json' \
--header 'Content-Type: application/json' \
--data-raw '{
    "input": {
        "name" : "snapshot1",
        "target-nodes": {
            "node": ["IOSXR","IOSXRN"]
        }
    }
}'

RPC Response, Status: 404
{
    "errors": {
        "error": [
            {
                "error-tag": "missing-element",
                "error-info": {
                    "node-id": "IOSXRN"
                },
                "error-type": "application",
                "error-message": "UniConfig node does not exist in snapshot 'snapshot1'."
            }
        ]
    }
}

# Failed Example

RPC input does not contain the target nodes, so RPC can not be executed.

RPC Request
curl --location --request POST 'http://localhost:8181/rests/operations/snapshot-manager:replace-config-with-snapshot' \
--header 'Accept: application/json' \
--header 'Content-Type: application/json' \
--data-raw '{
    "input": {
        "target-nodes": {
        }
    }
}'

RPC Response, Status: 400
{
    "errors": {
        "error": [
            {
                "error-tag": "missing-element",
                "error-type": "application",
                "error-message": "Nodes are not specified in input request"
            }
        ]
    }
}