add ramfs to HAL (#212)

hal/linux/package/agent/agent.mk

@@ -12,15 +12,16 @@ define AGENT_BUILD_CMDS
 endef
 
 define AGENT_INSTALL_TARGET_CMDS
-	$(INSTALL) -D -m 0750 $(@D)/build/cocos-agent $(TARGET_DIR)/bin
-	mkdir -p $(TARGET_DIR)/var/log/cocos
 	mkdir -p $(TARGET_DIR)/cocos/
+	mkdir -p $(TARGET_DIR)/var/log/cocos
+	mkdir -p $(TARGET_DIR)/cocos_init/
+	$(INSTALL) -D -m 0750 $(@D)/build/cocos-agent $(TARGET_DIR)/bin
 endef
 
 define AGENT_INSTALL_INIT_SYSTEMD
 	$(INSTALL) -D -m 0640 $(@D)/init/systemd/cocos-agent.service $(TARGET_DIR)/usr/lib/systemd/system/cocos-agent.service
-	$(INSTALL) -D -m 0750 $(@D)/init/systemd/cocos_network_setup.sh $(TARGET_DIR)/cocos/cocos_network_setup.sh
-	$(INSTALL) -D -m 0750 $(@D)/init/systemd/agent_start_script.sh $(TARGET_DIR)/cocos/agent_start_script.sh
+	$(INSTALL) -D -m 0750 $(@D)/init/systemd/agent_setup.sh $(TARGET_DIR)/cocos_init/agent_setup.sh
+	$(INSTALL) -D -m 0750 $(@D)/init/systemd/agent_start_script.sh $(TARGET_DIR)/cocos_init/agent_start_script.sh
 endef
 
 $(eval $(golang-package))

init/systemd/agent_setup.sh

@@ -1,5 +1,7 @@
 #!/bin/sh
 
+MOUNT_POINT="/cocos"
+
 # IFACES are all network interfaces excluding lo (LOOPBACK) and sit interfaces 
 IFACES=$(ip link show | grep -vE 'LOOPBACK|sit*' | awk -F': ' '{print $2}')
 
@@ -15,3 +17,9 @@ for IFACE in $IFACES; do
         dhclient $IFACE
     fi
 done
+
+if [ ! -d "$MOUNT_POINT" ]; then
+    mkdir -p $MOUNT_POINT
+fi
+
+mount -t ramfs ramfs $MOUNT_POINT

init/systemd/cocos-agent.service

@@ -11,8 +11,8 @@ StandardError=file:/var/log/cocos/agent.stderr
 Environment=AGENT_GRPC_PORT=7002
 Environment=AGENT_LOG_LEVEL=info
 
-ExecStartPre=/cocos/cocos_network_setup.sh
-ExecStart=/cocos/agent_start_script.sh
+ExecStartPre=/cocos_init/agent_setup.sh
+ExecStart=/cocos_init/agent_start_script.sh
 
 [Install]
 WantedBy=default.target

manager/qemu/config.go

@@ -173,7 +173,7 @@ func (config Config) ConstructQemuArgs() []string {
 	}
 
 	args = append(args, "-kernel", config.DiskImgConfig.KernelFile)
-	args = append(args, "-append", strconv.Quote("earlyprintk=serial console=ttyS0"))
+	args = append(args, "-append", strconv.Quote("quiet console=null rootfstype=ramfs"))
 	args = append(args, "-initrd", config.DiskImgConfig.RootFsFile)
 
 	// SEV