ToinstallPHPandcommonextensionsonCentOS,firstenableEPELandRemirepositoriesviasudoyuminstallepel-release-yandsudoyuminstallhttps://rpms.remirepo.net/enterprise/remi-release-7.rpm-y,theninstallyum-utils.Next,enablethedesiredPHPstreamsuchassudoyum-confi

DockerBuildKit is a modern image building backend. It can improve construction efficiency and maintainability by 1) parallel processing of independent construction steps, 2) more advanced caching mechanisms (such as remote cache reuse), and 3) structured output improves construction efficiency and maintainability, significantly optimizing the speed and flexibility of Docker image building. Users only need to enable the DOCKER_BUILDKIT environment variable or use the buildx command to activate this function.

DockerworkswithDockerDesktopbyprovidingauser-friendlyinterfaceandenvironmenttomanagecontainers,images,andresourcesonlocalmachines.1.DockerDesktopbundlesDockerEngine,CLI,Compose,andothertoolsintoonepackage.2.Itusesvirtualization(likeWSL2onWindowsorHyp

To monitor Docker container resource usage, built-in commands, third-party tools, or system-level tools can be used. 1. Use dockerstats to monitor real-time: Run dockerstats to view CPU, memory, network and disk IO indicators, support filtering specific containers and recording regularly with watch commands. 2. Get container insights through cAdvisor: Deploy cAdvisor containers to obtain detailed performance data and view historical trends and visual information through WebUI. 3. In-depth analysis with system-level tools: use top/htop, iostat, iftop and other Linux tools to monitor resource consumption at the system level, and integrate Prometheu

When the CentOS server cannot be connected to the network, you can follow the following steps to check: 1. Check the status of the network interface, use iplinkshow to confirm whether the interface is enabled, if not enabled, use sudoiplinksetup to start, and use ipaddrshow to check the IP allocation status; 2. If it is in DHCP mode, run sudodhclient to obtain the IP. If it is static configuration, check the IP, gateway and DNS settings in /etc/sysconfig/network-scripts/ifcfg- and restart the network service; 3. Check the routing table iprouteshow to ensure that there is a default gateway. If there is no, add it temporarily or modify GATEWAY in the configuration file.

Kubernetes is not a replacement for Docker, but the next step in managing large-scale containers. Docker is used to build and run containers, while Kubernetes is used to orchestrate these containers across multiple machines. Specifically: 1. Docker packages applications and Kubernetes manages its operations; 2. Kubernetes automatically deploys, expands and manages containerized applications; 3. It realizes container orchestration through components such as nodes, pods and control planes; 4. Kubernetes works in collaboration with Docker to automatically restart failed containers, expand on demand, load balancing and no downtime updates; 5. Applicable to application scenarios that require rapid expansion, running microservices, high availability and multi-environment deployment.

Adding new users to the CentOS system requires attention to security settings and permission management. The most basic method is to use the useradd command. Execute sudouseraddnewusername and add the -m parameter to create the user and home directory; use the -G parameter to specify the user group such as wheel to give sudo permissions. Then use sudopasswd to set the password. To configure sudo permissions, it is recommended to add the user to the wheel group: sudousermod-aGwheelnewusername and verify the sudo permissions. If you need SSH login, 1. Check the AllowUsers settings in /etc/ssh/sshd_config and add users

When encountering Docker problems, you should first locate the problem, which is problems such as image construction, container operation or network configuration, and then follow the steps to check. 1. Check the container log (dockerlogs or docker-composelogs) to obtain error information; 2. Check the container status (dockerps) and resource usage (dockerstats) to determine whether there is an exception due to insufficient memory or port problems; 3. Enter the inside of the container (dockerexec) to verify the path, permissions and dependencies; 4. Review whether there are configuration errors in the Dockerfile and compose files, such as environment variable spelling or volume mount path problems, and recommend that cleanbuild avoid cache dryness