Restructure VMSS bootstrap bash scripts for increased reliability, an…

…d easier debugging

Move all shared code into a commonly shared file to be sourced by all
bootstrapping scripts. This allows for code reuse, minimal duplication.
Fix mdm mdsd certificate download script
Increase rpm retry time to 30 minutes total, every 30 seconds.

pkg/deploy/generator/resources_dev.go

@@ -101,7 +101,16 @@ func (g *generator) devProxyVMSS() *arm.Resource {
 		)
 	}
 
-	trailer := base64.StdEncoding.EncodeToString(scriptDevProxyVMSS)
+	var sb strings.Builder
+
+	// VMSS extensions only support one custom script
+	// Because of this, the commonVMSS.sh is prefixed to the bootstrapping script
+	// main is called at the end of the bootstrapping script, so appending commonVMSS.sh won't work
+	sb.WriteString(string(scriptCommonVMSS))
+	sb.WriteString("\n#Start of devProxyVMSS.sh\n")
+	sb.WriteString(string(scriptDevProxyVMSS))
+
+	trailer := base64.StdEncoding.EncodeToString([]byte(sb.String()))
 
 	parts = append(parts, "'\n'", fmt.Sprintf("base64ToString('%s')", trailer))
 

pkg/deploy/generator/resources_gateway.go

@@ -243,7 +243,16 @@ func (g *generator) gatewayVMSS() *arm.Resource {
 		"''')\n'",
 	)
 
-	trailer := base64.StdEncoding.EncodeToString(scriptGatewayVMSS)
+	var sb strings.Builder
+
+	// VMSS extensions only support one custom script
+	// Because of this, the commonVMSS.sh is prefixed to the bootstrapping script
+	// main is called at the end of the bootstrapping script, so appending commonVMSS.sh won't work
+	sb.WriteString(string(scriptCommonVMSS))
+	sb.WriteString("\n#Start of gatewayVMSS.sh\n")
+	sb.WriteString(string(scriptGatewayVMSS))
+
+	trailer := base64.StdEncoding.EncodeToString([]byte(sb.String()))
 
 	parts = append(parts, "'\n'", fmt.Sprintf("base64ToString('%s')", trailer))
 

pkg/deploy/generator/resources_rp.go

@@ -531,7 +531,16 @@ func (g *generator) rpVMSS() *arm.Resource {
 		"''')\n'",
 	)
 
-	trailer := base64.StdEncoding.EncodeToString(scriptRpVMSS)
+	var sb strings.Builder
+
+	// VMSS extensions only support one custom script
+	// Because of this, the commonVMSS.sh is prefixed to the bootstrapping script
+	// main is called at the end of the bootstrapping script, so appending commonVMSS.sh won't work
+	sb.WriteString(string(scriptCommonVMSS))
+	sb.WriteString("\n#Start of rpVMSS.sh\n")
+	sb.WriteString(string(scriptRpVMSS))
+
+	trailer := base64.StdEncoding.EncodeToString([]byte(sb.String()))
 
 	parts = append(parts, "'\n'", fmt.Sprintf("base64ToString('%s')", trailer))
 

pkg/deploy/generator/scripts.go

@@ -15,3 +15,6 @@ var scriptGatewayVMSS []byte
 
 //go:embed scripts/rpVMSS.sh
 var scriptRpVMSS []byte
+
+//go:embed scripts/commonVMSS.sh
+var scriptCommonVMSS []byte