ODL十大问题：如何用postman控制ODL查看和下发流表 | SDNLAB

Opendaylight就不介绍了，资料非常丰富。
postman是Chrome浏览器的一个插件，常常会被用来调用服务器端的restful接口进行数据请求

下面记录一下如何用Chrome的插件postman来操作ODL查看和下发流表
准备工作

Chrome浏览器安装postman插件，如何安装，网上一搜一把
OpenDaylight启动完毕，并安装好需要的插件
OVS(IP:10.10.33.28)设置controller信息，端口号6653，连接ODL正常，ODL的Web管理界面能够看到这台OVS
在ODL或是OVS上获取OVS的DPID，例如openflow:128983913991
postman支持多种格式，例如JSON/XML/HTML，下面以JSON为例

显示流表

照例填入(修改适当的DPID)，点send即可

http://10.10.33.28:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:128983913991/flow-node-inventory:table/0

1	http://10.10.33.28:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:128983913991/flow-node-inventory:table/0

下发流表

"normal"的便签页写入网址,action选"PUT"

http://10.10.33.28:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:128983913991/flow-node-inventory:table/0

1	http://10.10.33.28:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:128983913991/flow-node-inventory:table/0

"basic Auth"标签，填入username/password,默认都是admin

点击右侧"Headers"按键，添加Headers信息:Content-Type/application/json

填入消息主体，下面举个例子

{
    "table": [
        {
            "id": "0",
            "flow": [
                {
                    "id": "0",
                    "match": {
                        "in-port": "1",
                        "vlan-match": {
                            "vlan-id": {
                                "vlan-id-present": "true",
                                "vlan-id": "20"
                            }
                        }
                    },
                    "instructions": {
                        "instruction": [
                            {
                                "apply-actions": {
                                    "action": [
                                        {
                                            "output-action": {
                                                "output-node-connector": "3",
                                                "max-length": "65535"
                                            },
                                            "order": "1"
                                        },
                                        {
                                            "pop-vlan-action": {},
                                            "order": "0"
                                        }
                                    ]
                                },
                                "order": "0"
                            }
                        ]
                    },
                    "buffer_id": "65535",
                    "installHw": "true",
                    "barrier": "true",
                    "strict": "true",
                    "priority": "160",
                    "idle-timeout": "0",
                    "hard-timeout": "0",
                    "table_id": "0"
                }
            ]
        }
    ]
}

{

"table": [

{

"id": "0",

"flow": [

{

"id": "0",

"match": {

"in-port": "1",

"vlan-match": {

"vlan-id": {

"vlan-id-present": "true",

"vlan-id": "20"

}

"instructions": {

"instruction": [

{

"apply-actions": {

"action": [

{

"output-action": {

"output-node-connector": "3",

"max-length": "65535"

"order": "1"

{

"pop-vlan-action": {},

"order": "0"

}

]

"order": "0"

}

]

"buffer_id": "65535",

"installHw": "true",

"barrier": "true",

"strict": "true",

"priority": "160",

"idle-timeout": "0",

"hard-timeout": "0",

"table_id": "0"

}

]

}

]

}

点击"send",应该发回OK

查看OVS上流表是否添加成功

DUT1# ovs-ofctl dump-flows br0 -O openflow13OFPST_FLOW reply (OF1.3) (xid=0x2): cookie=0x0, duration=3087.407s, table=0, n_packets=0, n_bytes=0, priority=160,in_port=1,dl_vlan=20 actions=pop_vlan,output:3

1	DUT1# ovs-ofctl dump-flows br0 -O openflow13OFPST_FLOW reply (OF1.3) (xid=0x2): cookie=0x0, duration=3087.407s, table=0, n_packets=0, n_bytes=0, priority=160,in_port=1,dl_vlan=20 actions=pop_vlan,output:3

小帖士

流表添加失败

同样的流表内容，如果send之后，清除OVS流表再send一遍，可能会添加失败，但是返回值还是OK的
此时可以稍微修改一下流表内容，例如修改一下priority的值，就可以添加成功了

关于流表的格式

有时可能不知道要怎么写消息的主体
可以先通过ODL的YANG UI添加一下

成功后，点击上图右下方的"眼睛"图标(之前版本这里是一个show按键)来show preview，就能获得整个消息内容
其中大括号里面的就是在需要的消息主体

作者简介：刘敬一，盛科网络SDN交换机产品线测试主管

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