The Event Center of Cloud Monitor currently provides the following monitoring information for product events:
CVM
Event Name
Event English Name
Event Type
Event Dimension
Recovery Concept Involved
Event Description
Handling Method and Suggestion
Kernel Failure
GuestCoreError
Exception
CVM instance
No
An operating system kernel bug or driver issue causes a critical error in the operating system kernel.
1.Check whether any kernel driver modules are loaded into the system other than those provided by the kernel. Try not to load these modules and observe the operating status of the system. 2. Monitor bug reports of the kernel and operating system distributions, and consider upgrading the kernel to resolve the bugs. 3. By default, kdump is enabled for CVM instances. When a panic occurs, system memory dump information will be generated in the /var/crash directory. Use the crash tool to analyze the information.
Out of Memory (OOM)
GuestOom
Exception
CVM instance
No
System memory usage is overloaded.
1.Check whether the memory capacity configured in the current system meets business requirements. If additional capacity is required, it is recommended to upgrade the CVM memory configuration. 2. View processes that are terminated during OOM based on system logs (such as dmesg and /var/log/messages) to check whether the memory used by the processes meets the expectations. Use tools such as valgrind to analyze whether memory leakage occurs.
Disk read-only
DiskReadonly
Exception
CVM instance
Yes
Data cannot be written into the disk.
1.Check whether the disk storage is full. 2. For Linux operating systems, check whether inodes are exhausted (df -i). 3. Check whether the file system is corrupted.
Server Restart
GuestReboot
Status change
CVM instance
Yes
The CVM instance is restarted.
This event is triggered when the CVM instance is restarted. Check whether the status change meets the expectations based on the actual situation.
Packet Loss Due to Outbound Bandwidth Limit of the Public Network Exceeded
PacketDroppedByQosWanOutBandwidth
Exception
CVM instance
Yes
The outbound public network bandwidth of the CVM instance exceeds the upper limit, causing packet loss.
Increase the upper limit of the public network bandwidth. If the maximum purchase limit has been reached, reduce the bandwidth usage of the instance through means such as load balancing.
Packet Loss Due to Connection Limit Exceeded
PacketDroppedByQosConnectionSession
Exception
CVM instance
Yes
An excessive number of connections to the CVM instance leads to packet loss. Taking the 8255C CPU model as an example, it is generally recognized that if the number of connections exceeds 500,000, packet loss may occur.
Contact after-sales service personnel.
VPN Gateway
Event Name
Event English Name
Event Type
Event Dimension
Recovery Concept Involved
Event Description
Handling Method and Suggestion
Packet Loss Due to Outbound Bandwidth Limit of the Public Network Exceeded
PacketDroppedByQosWanOutBandwidth
Exception
VPN gateway instance
Yes
The outbound public network bandwidth of the VPN gateway instance exceeds the upper limit, causing packet loss.
Increase the upper limit of the public network bandwidth.
Packet Loss Due to Connection Limit Exceeded
PacketDroppedByQosConnectionSession
Exception
VPN gateway instance
Yes
The number of connections to the VPN gateway instance exceeds the limit, causing packet loss.
