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- What is the isolation of docker containers by?
- Docker containers achieve isolation through the Linux kernel technology Namespace; the "Linux Namespaces" mechanism provides a resource isolation solution. The resources under each namespace are transparent and invisible to the resources under other namespaces, so at the operating system level There will be multiple processes with the same pid.
- Docker 4766 2022-08-15 16:42:06
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- Does docker belong to paas or iaas?
- Docker belongs to the pass layer; docker is an open source application engine, paas is the abbreviation of "Platform as a Service", which refers to the software development platform as a service, and docker is an open source application based on dotCloub, the paas provider. LXC's advanced container engine.
- Docker 2525 2022-08-15 16:30:47
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- What to do if the docker container cannot be stopped
- Solution to the problem of unable to stop the docker container: 1. Use the "docker rm -f container id that cannot be stopped" command to forcefully delete the specified container; 2. Use the "docker network disconnect --force bridge container id" command to clean up the container The network is occupied.
- Docker 6958 2022-07-29 15:59:43
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- Can docker be started without root permissions?
- Docker cannot be started without root permissions; using docker requires root permissions. Ordinary users without root permissions will not be able to operate docker. If ordinary users do not have root permissions, they can use sudo to obtain administrator permissions, run docker commands, or change the current user By joining the docker user group, the current user has permission to access the "Unix socket" and can execute docker related commands.
- Docker 8579 2022-07-29 15:53:23
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- What docker images can do
- In docker, images can be used to package software operating environments and software developed based on the operating environment; images are the prerequisite for Docker to run containers, and warehouses are the place where images are stored and are the core of Docker. In addition to providing the programs required for container runtime , libraries, resources, configuration and other files, it also contains some configuration parameters prepared for runtime.
- Docker 4398 2022-07-29 15:46:58
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- What is the use of docker image warehouse?
- In docker, the main function of the mirror warehouse is to store and distribute docker images; mirror warehouses are several places where images are stored. Mirror warehouses can be divided into remote warehouses and local warehouses. Remote warehouses can be understood as cloud warehouses and public warehouses. It is a warehouse maintained by an organization or company. The local warehouse can be understood as a private warehouse and is not open to the public.
- Docker 3026 2022-07-28 16:14:52
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- Why is docker lightweight?
- The reason why docker is a lightweight virtualization technology is that "the docker image is small in size"; docker virtualization is built on the operating system, and different versions of the Linux kernel are basically the same, so there is no need to install the operating system kernel, you only need to Just introduce the image of the corresponding operating system, and the image contains the corresponding file system, so the size of the docker image is very small.
- Docker 3764 2022-07-28 16:05:38
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- Can docker be installed on aix?
- Docker cannot be installed on aix; aix is a UNIX-like operating system developed by IBM based on "AT&T Unix System V". Whether docker is the ce or ee version, it can only provide limited support for the Power platform in the form of PowerLinux. Currently, it does not Installation on aix is not supported.
- Docker 2545 2022-07-27 17:12:59
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- Does docker support centos6 installation?
- Docker supports centos6 installation; official documents require that "Linux kernel" must be at least 3.8 to install docker, and docker can only run in 64-bit systems. Since the kernel versions of "RHEL6" and "CentOS6" are 2.6, they must first Installation can only be done after upgrading the kernel of the "CentOS6" system.
- Docker 3515 2022-07-27 17:02:45
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- Can docker replace vmware?
- docker cannot replace vmware; docker refers to the Docker container, which is an open source application container engine, and vmware virtual machine software is a virtual PC software. Although the container Docker technology has obvious advantages, the relationship between the two is not antagonistic, replacing or being replaced. , but it should be a complementary and cooperative relationship. Docker is more suitable for microservice architecture and is not suitable for relational database applications.
- Docker 3840 2022-07-26 16:18:19
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- Does docker need to install jdk?
- The docker service itself does not need to install jdk. If the java application container is used, jdk needs to be installed in the container; the docker container does not have jdk by default. If you need to run the java program, install jdk in the host machine and install jdk in the container. The full name of jdk is "Java" Development Kit" refers to the Java language software development toolkit, which is mainly used for the development of Java applications on mobile devices and embedded devices.
- Docker 6789 2022-07-26 16:05:16
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- What is docker container escape
- Docker container escape refers to the process and result that the attacker has obtained the command execution capability under certain permissions in the container by hijacking the containerized business logic or direct control; because docker uses isolation technology, the process in the container The outside process cannot be seen, but the outside process can see inside, so if a container can access outside resources or even obtain the permissions of the host host, this is called "Docker escape".
- Docker 4301 2022-07-25 17:13:57
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- What is the difference between deploying with docker and deploying directly?
- The difference between deployment with docker and direct deployment: 1. Docker deployment and installation are faster and more efficient; 2. Docker deployment takes up less resources, which is MB level, while direct installation of the server takes GB level; 3. Docker uninstallation and Management is more convenient and clean, just delete containers and images directly.
- Docker 4983 2022-07-25 17:08:08
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- Is installation of redis supported on docker?
- Installation of redis is supported on docker. The installation method is: 1. Use "$ docker pull redis:latest" to install the redis image; 2. After the installation is completed, use the "$ docker run -itd --name redis -p port number redis" command to run the redis container; 3. You can Use "$ docker ps -a" to check whether the container is successfully installed.
- Docker 2790 2022-07-25 16:59:26
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- What to do if the docker-compose command does not exist
- Solution: 1. Use the "dnf install docker-compose" command to install "docker-compose" in the fedora system; 2. Use the "yum install docker-compose" command to install it in the "CentOS 7/RHEL7" system; 3. , debian and its variants such as Ubuntu system can be installed using the "apt-get install docker-compose" command.
- Docker 16152 2022-07-25 16:48:21
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