Showtech sonic mgmt framework: Add Management Framework functionality for "show tech-support"

models/yang/annotations/sonic-showtech-annot.yang

@@ -0,0 +1,17 @@
+module sonic-showtech-annot {
+
+    yang-version "1";
+
+    namespace "http://openconfig.net/Azure/sonic-showtech-annot";
+    prefix "showtech-annot";
+
+    import sonic-extensions { prefix sonic-ext; }
+    import sonic-show-techsupport { prefix sshwtchspt; }
+
+    deviation /sshwtchspt:sonic-show-techsupport-info {
+      deviate add {
+        sonic-ext:rpc-callback "rpc_showtech_cb";
+      }
+    }
+
+}

models/yang/sonic/sonic-show-techsupport.yang

@@ -0,0 +1,49 @@
+module sonic-show-techsupport {
+	namespace "http://github.com/Azure/sonic-show-techsupport";
+	prefix sshwtchspt;
+    yang-version 1.1;
+
+	import ietf-yang-types {
+		prefix yang;
+	}
+
+	organization
+		"SONiC";
+
+	contact
+		"SONiC";
+
+	description
+		"SONiC TECH SUPPORT INFORMATION";
+
+	revision 2019-10-15 {
+		description
+			"Initial revision.";
+	}
+
+	rpc sonic-show-techsupport-info {
+        input {
+            leaf date {
+                type yang:date-and-time;
+                description
+                    "Date and time specification of the desired start
+                    point for collected log and core information";
+            }
+        }
+        output {
+            leaf output-status {
+                type string;
+                description
+                    "'Success' or detailed failure message for execution of the
+                    'show tech-support' request";
+            }
+            leaf output-filename {
+                type string;
+                description
+                    "Name of the host compressed tar file containing the collected
+                    technical support information";
+            }
+        }
+	}
+}
+

translib/transformer/host_comm.go

@@ -0,0 +1,81 @@
+package transformer
+
+import (
+	"strings"
+
+	"github.com/godbus/dbus/v5"
+    log "github.com/golang/glog"
+)
+
+// HostResult contains the body of the response and the error if any, when the 
+// endpoint finishes servicing the D-Bus request.
+type HostResult struct {
+	Body	[]interface{}
+	Err		error
+}
+
+// HostQuery calls the corresponding D-Bus endpoint on the host and returns
+// any error and response body
+func HostQuery(endpoint string, args ...interface{}) (result HostResult) {
+    log.Infof("HostQuery called")
+	result_ch, err := hostQueryAsync(endpoint, args...)
+
+	if err != nil {
+		result.Err = err
+		return
+	}
+
+	result = <-result_ch
+	return
+}
+
+// hostQueryAsync calls the corresponding D-Bus endpoint on the host and returns
+// a channel for the result, and any error
+func hostQueryAsync(endpoint string, args ...interface{}) (chan HostResult, error) {
+    log.Infof("HostQueryAsync called")
+	var result_ch = make(chan HostResult, 1)
+	conn, err := dbus.SystemBus()
+	if err != nil {
+		return result_ch, err
+	}
+    log.Infof("HostQueryAsync conn established")
+
+	service := strings.SplitN(endpoint, ".", 2)
+	const bus_name_base = "org.SONiC.HostService."
+	bus_name := bus_name_base + service[0]
+	bus_path := dbus.ObjectPath("/org/SONiC/HostService/" + service[0])
+
+	obj := conn.Object(bus_name, bus_path)
+	dest := bus_name_base + endpoint
+	dbus_ch := make(chan *dbus.Call, 1)
+    //log.Infof("HostQueryAsync dbus called %s "% string(bus_path))
+    //log.Infof("HostQueryAsync dbus called %s  "% string(bus_name))
+
+	go func() {
+		var result HostResult
+
+		// Wait for a read on the channel
+		call := <-dbus_ch
+
+		if call.Err != nil {
+            log.Infof("HostQueryAsync Err is not nill while reading")
+			result.Err = call.Err
+		} else {
+            log.Infof("HostQueryAsync Body is taken")
+			result.Body = call.Body
+		}
+
+		// Write the result to the channel
+		result_ch <- result
+	}()
+
+    log.Infof("HostQueryAsync Before objgo")
+	call := obj.Go(dest, 0, dbus_ch, args...)
+
+	if call.Err != nil {
+        log.Infof("HostQueryAsync Err is not after obj.Go")
+		return result_ch, call.Err
+	}
+
+	return result_ch, nil
+}

translib/transformer/xfmr_showtech.go

@@ -0,0 +1,100 @@
+////////////////////////////////////////////////////////////////////////////////
+//                                                                            //
+//  Copyright 2019 Dell, Inc.                                                 //
+//                                                                            //
+//  Licensed under the Apache License, Version 2.0 (the "License");           //
+//  you may not use this file except in compliance with the License.          //
+//  You may obtain a copy of the License at                                   //
+//                                                                            //
+//  http://www.apache.org/licenses/LICENSE-2.0                                //
+//                                                                            //
+//  Unless required by applicable law or agreed to in writing, software       //
+//  distributed under the License is distributed on an "AS IS" BASIS,         //
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  //
+//  See the License for the specific language governing permissions and       //
+//  limitations under the License.                                            //
+//                                                                            //
+////////////////////////////////////////////////////////////////////////////////
+
+package transformer
+
+import (
+    "encoding/json"
+    "github.com/Azure/sonic-mgmt-common/translib/tlerr"
+    "github.com/Azure/sonic-mgmt-common/translib/db"
+    "github.com/golang/glog"
+    "regexp"
+)
+
+func init() {
+    XlateFuncBind("rpc_showtech_cb", rpc_showtech_cb)
+}
+
+var rpc_showtech_cb RpcCallpoint = func(body []byte, dbs [db.MaxDB]*db.DB) ([]byte, error) {
+    var err error
+    var matched bool
+    var output string
+    var operand struct {
+        Input struct {
+            Date string `json:"date"`
+        } `json:"sonic-show-techsupport:input"`
+    }
+
+    err = json.Unmarshal(body, &operand)
+    if err != nil {
+        glog.Errorf("%Error: Failed to parse rpc input; err=%v", err)
+        return nil,tlerr.InvalidArgs("Invalid rpc input")
+    }
+
+    if operand.Input.Date == "" {
+        matched = true
+    } else {
+        matched, _ = regexp.MatchString((`\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\.\d+)?` +
+                                           `(Z|[\+\-]\d{2}:\d{2})`), operand.Input.Date)
+        if err != nil {
+            glog.Errorf("%Error: Failed to match regex pattern for parsesd rpc input; err=%v", err)
+        }
+
+    }
+
+    var showtech struct {
+        Output struct {
+            Status string `json:"output-status"`
+            Filename string `json:"output-filename"`
+        } `json:"sonic-show-techsupport:output"`
+    }
+
+    if !(matched) {
+        showtech.Output.Status = "Invalid input: Incorrect DateTime format"
+        showtech.Output.Filename = ""
+        result, _ := json.Marshal(&showtech)
+        return result, nil
+    }
+
+    host_output := HostQuery("showtech.info", operand.Input.Date)
+    if host_output.Err != nil {
+        glog.Errorf("%Error: Showtech host Query failed: err=%v", host_output.Err)
+        glog.Flush()
+        showtech.Output.Status = host_output.Err.Error()
+        showtech.Output.Filename = ""
+        result, _ := json.Marshal(&showtech)
+        return result, nil
+    }
+
+    output, _ = host_output.Body[1].(string)
+    matched, _ = regexp.MatchString(`\/var\/.*dump.*\.gz`, output)
+    if err != nil {
+        glog.Errorf("%Error: Failed to find a filename in rpc output: %v", output)
+        showtech.Output.Status = output
+        showtech.Output.Filename = ""
+        result, _ := json.Marshal(&showtech)
+	return result, nil
+    }
+
+    showtech.Output.Status = "Success"
+    showtech.Output.Filename = output
+    result, _ := json.Marshal(&showtech)
+
+    return result, nil
+}
+