FAQ on Service

Last updated: 2020-07-20 10:38:27

    FAQ on Service Creation

    Why must a service name be unique?

    A service name is a unique service identifier under the current cluster. Services access each other by entering service names + access ports.

    Can I use a third-party image instead of Tencent Cloud or Docker Hub image when creating services?

    Yes. You can log in to your CVM and execute the command docker login to log in to the third-party image repository and pull the image.

    What are the prerequisites for using internet services?

    Ensure that CVM’s in the cluster have internet bandwidth. Otherwise the creation of internet services may fail.

    How do I configure memory and CPU limits?

    For more information, see Setting Limit on Service Resources.

    What does "Privilege" mean?

    If this option is enabled, applications in the container can have true root permission. We recommend that enable this option when you need to perform higher-level system operations on the applications in the container; for example, building NFS server.

    FAQ on Updating Number of Service Containers

    What should I take note of when I update the number of containers?

    Confirm if CPU and memory resources are sufficient. Otherwise container creation will fail.

    Can I set the number of containers to 0?

    Yes. You can set the number to 0. In this case, the service configuration is retained but the resources will be freed up.

    FAQ on Service Configuration Updating

    Is rolling update supported?

    Both rolling update and quick update are supported.

    FAQ on Service Deletion

    When I delete a service, will the load balancer created by the service also be terminated?

    All containers and internet load balancers under a service are terminated upon service deletion. Back up the data in advance.

    FAQ on Service Operation

    How do I set the container system time to Beijing time?

    Containers use UTC by default. If the problem of an 8-hour difference between the container system time and Beijing time always occurs when you use a container, create a time zone file in Dockerfile.

    RUN echo "Asia/shanghai" > /etc/timezone;

    What can I do when some Docker Hub images, such as ubuntu, php and busybox, encounter exceptions in TKE?

    If the startup command is not set or the default startup command is bash, the container will exit after the startup procedure is completed. To keep the container running, the process in the container with PID set to 1 must be the permanent process. Otherwise, the container exits when this process ends. For some images like CentOS, you can create services by using /bin/bash as the running command and -c sleep 800000 as the running parameter. -c and sleep 800000 must be entered in different rows in the console.

    Currently, the images that cannot be started using default parameters include: clearlinux, ros, mageia, amazonlinux, ubuntu, clojure, crux, gcc, photon, java, debian, oraclelinux, mono, bash, buildpack-deps, golang, sourcemage, Swift, openjdk, centos, busybox, docker, alpine, ibmjava, php, and python.

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