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- Linux Kernel Integer Overflow Vulnerability (CVE-2022-0185)
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- Notice of NVIDIA GPU Driver Vulnerability (CVE-2021-1056)
- Notice on the Sudo Buffer Vulnerability (CVE-2021-3156)
- Notice on the Kubernetes Security Vulnerability (CVE-2020-8554)
- Notice of Apache containerd Security Vulnerability (CVE-2020-15257)
- Notice on the Docker Engine Input Verification Vulnerability (CVE-2020-13401)
- Notice of Kubernetes kube-apiserver Input Verification Vulnerability (CVE-2020-8559)
- Notice on the Kubernetes kubelet Resource Management Vulnerability (CVE-2020-8557)
- Notice on the Kubernetes kubelet and kube-proxy Authorization Vulnerability (CVE-2020-8558)
- Notice on Fixing Kubernetes HTTP/2 Vulnerability
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- Notice on Fixing the Docker Command Injection Vulnerability (CVE-2019-5736)
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Cluster Versions
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Clusters
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Cluster Overview
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Kubernetes Version Release Notes
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- Buying a Cluster
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Managing a Cluster
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Upgrading a Cluster
- Process and Method of Upgrading a Cluster
- Before You Start
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Troubleshooting for Pre-upgrade Check Exceptions
- Pre-upgrade Check
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Cluster Overview
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Nodes
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Management Nodes
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- Stopping a Node
-
Node O&M
- Node Resource Reservation Policy
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- Differences in kubelet and Runtime Component Configurations Between CCE and the Native Community
- Migrating Nodes from Docker to containerd
- Optimizing Node System Parameters
- Configuring Node Fault Detection Policies
- Node Pools
-
Workloads
- Overview
- Creating a Workload
-
Configuring a Workload
- Configuring Time Zone Synchronization
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-
Network
- Overview
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Container Network
- Overview
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Cloud Native Network 2.0 Settings
- Cloud Native 2.0 Network Model
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Service
- Overview
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LoadBalancer
- Creating a LoadBalancer Service
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- Setting the Pod Ready Status Through the ELB Health Check
- Headless Services
-
Ingresses
- Overview
-
LoadBalancer Ingresses
- Creating a LoadBalancer Ingress on the Console
- Creating a LoadBalancer Ingress Using kubectl
- Annotations for Configuring LoadBalancer Ingresses
-
Advanced Setting Examples of LoadBalancer Ingresses
- Configuring an HTTPS Certificate for a LoadBalancer Ingress
- Configuring SNI for a LoadBalancer Ingress
- Configuring Multiple Forwarding Policies for a LoadBalancer Ingress
- Configuring HTTP/2 for a LoadBalancer Ingress
- Configuring HTTPS Backend Services for a LoadBalancer Ingress
- Configuring Timeout for a LoadBalancer Ingress
- Configuring a Slow Start for a LoadBalancer Ingress
- Configuring a Range of Listening Ports for a LoadBalancer Ingress
- Nginx Ingresses
- DNS
- Configuring Intra-VPC Access
- Accessing the Internet from a Container
- Storage
- Observability
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Old Console
- What Is Cloud Container Engine?
- High-Risk Operations and Solutions
- Clusters
-
Nodes
- Overview
- Buying a Node
- Accepting ECSs as Nodes into a Cluster
- Removing a Node
- Logging In to a Node
- Managing Node Labels
- Synchronizing Node Data
- Configuring Node Scheduling (Tainting)
- Resetting a Node
- Deleting a Node
- Stopping a Node
- Performing Rolling Upgrade for Nodes
- Formula for Calculating the Reserved Resources of a Node
- Creating a Linux LVM Disk Partition for Docker
- Data Disk Space Allocation
- Adding a Second Data Disk to a Node in a CCE Cluster
- Node Pools
-
Workloads
- Overview
- Creating a Deployment
- Creating a StatefulSet
- Creating a DaemonSet
- Creating a Job
- Creating a Cron Job
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- Managing Workloads and Jobs
- Scaling a Workload
-
Configuring a Container
- Using a Third-Party Image
- Setting Container Specifications
- Setting Container Lifecycle Parameters
- Setting Container Startup Commands
- Setting Health Check for a Container
- Setting an Environment Variable
- Enabling ICMP Security Group Rules
- Configuring an Image Pull Policy
- Configuring Time Zone Synchronization
- DNS Configuration
- Pod Scale-in Priorities
- Configuring QoS Rate Limiting for Inter-Pod Access
- Adding Pod Annotations
- Affinity and Anti-Affinity Scheduling
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- Cloud Trace Service (CTS)
-
Best Practices
- Checklist for Deploying Containerized Applications in the Cloud
- Containerization
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Security
- Configuration Suggestions on CCE Cluster Security
- Configuration Suggestions on CCE Node Security
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-
API Reference
- Before You Start
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- Calling APIs
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APIs
- API URL
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Cluster Management
- Creating a Cluster
- Reading a Specified Cluster
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- Hibernating a Cluster
- Waking Up a Cluster
- Obtaining a Cluster Certificate
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- Binding/Unbinding Public API Server Address
- Obtaining Cluster Access Address
- Obtaining a Cluster's Logging Configurations
- Configuring Cluster Logs
- Obtaining the Partition List
- Creating a Partition
- Obtaining Partition Details
- Updating a Partition
- Node Management
- Node Pool Management
- Storage Management
- Add-on Management
-
Cluster Upgrade
- Upgrading a Cluster
- Obtaining Cluster Upgrade Task Details
- Retrying a Cluster Upgrade Task
- Suspending a Cluster Upgrade Task (Deprecated)
- Continuing to Execute a Cluster Upgrade Task (Deprecated)
- Obtaining a List of Cluster Upgrade Task Details
- Pre-upgrade Check
- Obtaining Details About a Pre-upgrade Check Task of a Cluster
- Obtaining a List of Pre-upgrade Check Tasks of a Cluster
- Post-upgrade Check
- Cluster Backup
- Obtaining a List of Cluster Backup Task Details
- Obtaining the Cluster Upgrade Information
- Obtaining a Cluster Upgrade Path
- Obtaining the Configuration of Cluster Upgrade Feature Gates
- Enabling the Cluster Upgrade Process Booting Task
- Obtaining a List of Upgrade Workflows
- Obtaining Details About a Specified Cluster Upgrade Task
- Updating the Status of a Specified Cluster Upgrade Booting Task
- Quota Management
- API Versions
- Tag Management
- Configuration Management
-
Chart Management
- Uploading a Chart
- Obtaining a Chart List
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- Updating a Chart
- Creating a Release
- Deleting a Chart
- Updating a Release
- Obtaining a Chart
- Deleting a Release
- Downloading a Chart
- Obtaining a Release
- Obtaining Chart Values
- Obtaining Historical Records of a Release
- Obtaining the Quota of a User Chart
- Kubernetes APIs
- Permissions and Supported Actions
-
Appendix
- Status Code
- Error Codes
- Obtaining a Project ID
- Obtaining an Account ID
- Specifying Add-ons to Be Installed During Cluster Creation
- How to Obtain Parameters in the API URI
- Creating a VPC and Subnet
- Creating a Key Pair
- Node Flavor Description
- Adding a Salt in the password Field When Creating a Node
- Maximum Number of Pods That Can Be Created on a Node
- Node OS
- Data Disk Space Allocation
- Attaching Disks to a Node
- SDK Reference
-
FAQs
- Common FAQ
- Billing
- Cluster
-
Node
- Node Creation
-
Node Running
- What Should I Do If a Cluster Is Available But Some Nodes Are Unavailable?
- How Do I Log In to a Node Using a Password and Reset the Password?
- How Do I Collect Logs of Nodes in a CCE Cluster?
- What Should I Do If the vdb Disk of a Node Is Damaged and the Node Cannot Be Recovered After Reset?
- What Should I Do If I/O Suspension Occasionally Occurs When SCSI EVS Disks Are Used?
- How Do I Fix an Abnormal Container or Node Due to No Thin Pool Disk Space?
- How Do I Rectify Failures When the NVIDIA Driver Is Used to Start Containers on GPU Nodes?
- Specification Change
- OSs
- Node Pool
-
Workload
-
Workload Exception Troubleshooting
- How Can I Find the Fault for an Abnormal Workload?
- What Should I Do If Pod Scheduling Fails?
- What Should I Do If a Pod Fails to Pull the Image?
- What Should I Do If Container Startup Fails?
- What Should I Do If a Pod Fails to Be Evicted?
- What Should I Do If a Storage Volume Cannot Be Mounted or the Mounting Times Out?
- What Should I Do If a Workload Remains in the Creating State?
- What Should I Do If a Pod Remains in the Terminating State?
- What Should I Do If a Workload Is Stopped Caused by Pod Deletion?
- What Should I Do If an Error Occurs When I Deploy a Service on the GPU Node?
- How Can I Locate Faults Using an Exit Code?
- Container Configuration
- Scheduling Policies
-
Others
- What Should I Do If a Cron Job Cannot Be Restarted After Being Stopped for a Period of Time?
- What Is a Headless Service When I Create a StatefulSet?
- What Should I Do If Error Message "Auth is empty" Is Displayed When a Private Image Is Pulled?
- What Is the Image Pull Policy for Containers in a CCE Cluster?
- What Can I Do If a Layer Is Missing During Image Pull?
-
Workload Exception Troubleshooting
-
Networking
-
Network Exception Troubleshooting
- How Do I Locate a Workload Networking Fault?
- Why Does the Browser Return Error Code 404 When I Access a Deployed Application?
- What Should I Do If a Container Fails to Access the Internet?
- What Should I Do If a Node Fails to Connect to the Internet (Public Network)?
- What Should I Do If Nginx Ingress Access in the Cluster Is Abnormal After the NGINX Ingress Controller Add-on Is Upgraded?
- What Could Cause Access Exceptions After Configuring an HTTPS Certificate for a LoadBalancer Ingress?
- Network Planning
- Security Hardening
-
Network Configuration
- How Can Container IP Addresses Survive a Container Restart?
- How Can I Check Whether an ENI Is Used by a Cluster?
- How Can I Delete a Security Group Rule Associated with a Deleted Subnet?
- How Can I Synchronize Certificates When Multiple Ingresses in Different Namespaces Share a Listener?
- How Can I Determine Which Ingress the Listener Settings Have Been Applied To?
-
Network Exception Troubleshooting
-
Storage
- How Do I Expand the Storage Capacity of a Container?
- What Are the Differences Among CCE Storage Classes in Terms of Persistent Storage and Multi-Node Mounting?
- Can I Create a CCE Node Without Adding a Data Disk to the Node?
- What Should I Do If the Host Cannot Be Found When Files Need to Be Uploaded to OBS During the Access to the CCE Service from a Public Network?
- How Can I Achieve Compatibility Between ExtendPathMode and Kubernetes client-go?
- Can CCE PVCs Detect Underlying Storage Faults?
- What Should I Do If a Yearly/Monthly EVS Disk Cannot Be Automatically Created?
- Namespace
-
Chart and Add-on
- What Should I Do If Installation of an Add-on Fails and "The release name is already exist" Is Displayed?
- How Do I Configure the Add-on Resource Quotas Based on Cluster Scale?
- How Can I Clean Up Residual Resources After the NGINX Ingress Controller Add-on in the Unknown State Is Deleted?
- Why TLS v1.0 and v1.1 Cannot Be Used After the NGINX Ingress Controller Add-on Is Upgraded?
-
API & kubectl FAQs
- How Can I Access a Cluster API Server?
- Can the Resources Created Using APIs or kubectl Be Displayed on the CCE Console?
- How Do I Download kubeconfig for Connecting to a Cluster Using kubectl?
- How Do I Rectify the Error Reported When Running the kubectl top node Command?
- Why Is "Error from server (Forbidden)" Displayed When I Use kubectl?
- DNS FAQs
- Image Repository FAQs
- Permissions
- Videos
How Can I Locate Faults Using an Exit Code?
When a container fails to be started or terminated, the exit code is recorded by Kubernetes events to report the cause. This section describes how to locate faults using an exit code.
Viewing an Exit Code
You can use kubectl to connect to the cluster and run the following command to check the pod:
kubectl describe pod {pod name}
Containers: container-1: Container ID: ... Image: ... Image ID: ... Ports: ... Host Ports: ... Args: ... State: Running Started: Sat, 28 Jan 2023 09:06:53 +0000 Last State: Terminated Reason: Error Exit Code: 255 Started: Sat, 28 Jan 2023 09:01:33 +0000 Finished: Sat, 28 Jan 2023 09:05:11 +0000 Ready: True Restart Count: 1
Description
The exit code ranges from 0 to 255.
- If the exit code is 0, the container exits normally.
- Generally, if the abnormal exit is caused by the program, the exit code ranges from 1 to 128. In special scenarios, the exit code ranges from 129 to 255.
- When a program exits due to external interrupts, the exit code ranges from 129 to 255. When the operating system sends an interrupt signal to the program, the exist code is the interrupt signal value plus 128. For example, if the interrupt signal value of SIGKILL is 9, the exit status code is 137 (9 + 128).
- If the exist code is not in the range of 0 to 255, for example, exit(-1), the exit code is automatically converted to a value that is within this range.
If the exist code is a positive number, the conversion formula is as follows:
code % 256
If the exit code is a negative number, the conversion formula is as follows:
256 - (|code| % 256)
For details, see Exit Codes With Special Meanings.
Common Exit Codes
Exit Code |
Name |
Description |
---|---|---|
0 |
Normal exit |
The container exits normally. This status code does not always indicate that an exception occurs. When there is no process in the container, it may also be displayed. |
1 |
Common program error |
There are many causes for this exception, most of which are caused by the program. You need to further locate the cause through container logs. For example, this error occurs when an x86 image is running on an Arm node. |
125 |
The container is not running. |
The possible causes are as follows:
|
126 |
Command calling error |
The command called in the image cannot be executed. For example, the file permission is insufficient or the file cannot be executed. |
127 |
The file or directory cannot be found. |
The file or directory specified in the image cannot be found. |
128 |
Invalid exit parameter |
The container exits but no valid exit code is provided. There are multiple possible causes. You need to further locate the cause. For example, an application running on the containerd node attempts to call the docker command. |
137 |
Immediate termination (SIGKILL) |
The program is terminated by the SIGKILL signal. The common causes are as follows:
|
139 |
Segmentation error (SIGSEGV) |
The container receives the SIGSEGV signal from the OS because the container attempts to access an unauthorized memory location. |
143 |
Graceful termination (SIGTERM) |
The container is correctly closed as instructed by the host. Generally, this exit code 143 does not require troubleshooting. |
255 |
The exit code is out of range. |
The container exit code is out of range. For example, exit(-1) may be used for abnormal exit, and -1 is automatically converted to 255. Further troubleshooting is required. |
Linux Standard Interrupt Signals
You can run the kill -l command to view the signals and corresponding values in the Linux OS.
Signal |
Value |
Action |
Commit |
---|---|---|---|
SIGHUP |
1 |
Term |
Sent when the user terminal connection (normal or abnormal) ends. |
SIGINT |
2 |
Term |
Program termination signal, which is sent by the terminal by pressing Ctrl+C. |
SIGQUIT |
3 |
Core |
Similar to SIGINT, the exit command is sent by the terminal. Generally, the exit command is controlled by pressing Ctrl+\. |
SIGILL |
4 |
Core |
Invalid instruction, usually because an error occurs in the executable file. |
SIGABRT |
6 |
Core |
Signal generated when the abort function is invoked. The process ends abnormally. |
SIGFPE |
8 |
Core |
A floating-point arithmetic error occurs. Other arithmetic errors such as divisor 0 also occur. |
SIGKILL |
9 |
Term |
Any process is terminated. |
SIGSEGV |
11 |
Core |
Attempt to access an unauthorized memory location. |
SIGPIPE |
13 |
Term |
The pipe is disconnected. |
SIGALRM |
14 |
Term |
Indicates clock timing. |
SIGTERM |
15 |
Term |
Process end signal, which is usually the normal exit of the program. |
SIGUSR1 |
10 |
Term |
This is a user-defined signal in applications. |
SIGUSR2 |
12 |
Term |
This is a user-defined signal in applications. |
SIGCHLD |
17 |
Ign |
This signal is generated when a subprocess ends or is interrupted. |
SIGCONT |
18 |
Cont |
Resume a stopped process. |
SIGSTOP |
19 |
Stop |
Suspend the execution of a process. |
SIGTSTP |
20 |
Stop |
Stop a process. |
SIGTTIN |
21 |
Stop |
The background process reads the input value from the terminal. |
SIGTTOU |
22 |
Stop |
The background process reads the output value from the terminal. |
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