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Managing a Cluster
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Upgrading a Cluster
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Cluster Overview
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Nodes
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Node O&M
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Workloads
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Advanced Setting Examples of LoadBalancer Ingresses
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Configuring a Container
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Security
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Cluster Management
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Appendix
- Status Code
- Error Codes
- Obtaining a Project ID
- Obtaining an Account ID
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- 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
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- Attaching Disks to a Node
- SDK Reference
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FAQs
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Node
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Node Running
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- 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
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Workload
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Workload Exception Troubleshooting
- How Can I Find the Fault for an Abnormal Workload?
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- 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
Creating a Container Workload
This section describes how to deploy a workload on CCE. When using CCE for the first time, create an initial cluster and add a node into the cluster.
Containerized workloads are deployed in a similar way. The difference lies in:
- Whether environment variables need to be set.
- Whether cloud storage is used.
Required Cloud Services
- Cloud Container Engine (CCE): a highly reliable and high-performance service that allows enterprises to manage containerized applications. With support for Kubernetes-native applications and tools, CCE makes it simple to set up an environment for running containers in the cloud.
- Elastic Cloud Server (ECS): a scalable and on-demand cloud server. It helps you to efficiently set up reliable, secure, and flexible application environments, ensuring stable service running and improving O&M efficiency.
- Virtual Private Cloud (VPC): an isolated and private virtual network environment that users apply for in the cloud. You can configure the IP address ranges, subnets, and security groups, as well as assign elastic IP addresses and allocate bandwidth in a VPC.
Basic Concepts
- A cluster is a collection of computing resources, including a group of node resources. A container runs on a node. Before creating a containerized application, you must have an available cluster.
- A node is a virtual or physical machine that provides computing resources. You must have sufficient node resources to ensure successful operations such as creating applications.
- A workload indicates a group of container pods running on CCE. CCE supports third-party application hosting and provides the full lifecycle (from deployment to O&M) management for applications. This section describes how to use a container image to create a workload.
Procedure
- Prepare the environment as described in Table 1.
Table 1 Preparing the environment No.
Category
Procedure
1
Creating a VPC
Create a VPC before you create a cluster. A VPC provides an isolated, configurable, and manageable virtual network environment for CCE clusters.
If you have a VPC already, skip to the next task.
- Log in to the management console.
- In the service list, choose Networking > Virtual Private Cloud.
- On the Dashboard page, click Create VPC.
- Follow the instructions to create a VPC. Retain default settings for parameters unless otherwise specified.
2
Creating a key pair
Create a key pair before you create a containerized application. Key pairs are used for identity authentication during remote login to a node. If you have a key pair already, skip this task.
- Log in to the management console.
- In the service list, choose Data Encryption Workshop under Security & Compliance.
- In the navigation pane, choose Key Pair Service. On the Private Key Pairs tab, click Create Key Pair.
- Enter a key pair name, select I agree to host the private key of the key pair. and I have read and agree to the Key Pair Service Disclaimer, and click OK.
- View and save the private key. For security purposes, a key pair can be downloaded only once. Keep it secure to ensure successful login.
- Create a cluster and a node.
- Deploy a workload on CCE.
- Log in to the CCE console and click the name of the cluster to access the cluster console. In the navigation pane, choose Workloads and click Create Workload.
- Configure the following parameters, and retain the default settings for other parameters:
- Workload Name: Set it to apptest.
- Pods: Set it to 1.
Figure 1 Basic settings - In the Container Settings area, select the image uploaded in Building and Uploading an Image.
- In the Container Settings area, choose Environment Variables and add environment variables for interconnecting with the MySQL database. The environment variables are set in the startup script.
NOTE:
In this example, interconnection with the MySQL database is implemented through configuring the environment variables. Determine whether to use environment variables based on your service requirements.
Table 2 Configuring environment variables Variable Name
Variable Value/Variable Reference
MYSQL_DB
Database name.
MYSQL_URL
IP address and port number of the database.
MYSQL_USER
Database username.
MYSQL_PASSWORD
Database user password.
- In the Container Settings area, choose Data Storage and configure cloud storage for persistent data storage.
NOTE:
In this example, the MongoDB database is used and persistent data storage is also needed, so you need to configure cloud storage. Determine whether to use cloud storage based on your service requirements.
The mounted path must be the same as the MongoDB storage path in the Docker startup script. For details, see the startup script. In this example, the path is /usr/local/mongodb/data.
Figure 2 Configuring cloud storage - In the Service Settings area, click
to add a service, configure workload access parameters, and click OK.
NOTE:
In this example, the application will be accessible from public networks by using an elastic IP address.
- Service Name: name of the application that can be accessed externally. In this example, this parameter is set to apptest.
- Service Type: Select NodePort.
- Service Affinity
- Cluster-level: The IP addresses and access ports of all nodes in a cluster can be used to access the workload associated with the Service. Service access will cause performance loss due to route redirection, and the source IP address of the client cannot be obtained.
- Node-level: Only the IP address and access port of the node where the workload is located can be used to access the workload associated with the Service. Service access will not cause performance loss due to route redirection, and the source IP address of the client can be obtained.
- Port
- Protocol: Set it to TCP.
- Service Port: port for accessing the Service.
- Container Port: port that the application will listen on the container. In this example, this parameter is set to 8080.
- Node Port: Set it to Auto. The system automatically opens a real port on all nodes in the current cluster and then maps the port number to the container port.
Figure 3 Creating a Service - Click Create Workload.
After the workload is created, you can view the running workload in the workload list.
Verifying a Workload
After a workload is created, you can access the workload to check whether the deployment is successful.
In the preceding configuration, the NodePort mode is selected to access the workload by using IP address:Port number. If the access is successful, the workload is successfully deployed.
You can obtain the access mode from the Access Mode tab on the workload details page.
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