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Basic concepts of Nginx definition Nginx (engine x) is a high-performance HTTP and reverse proxy web server. It also provides IMAP/POP3/SMTP services. Nginx was developed by Igor sesoyev for Rambler.ru, the second most visited site in Russia. It is famous for its stability, rich feature set, simple configuration file and low consumption of sy ...

preface [schedule name] Game 1 of cloud computing competition - Private Cloud An enterprise plans to use OpenStack to build an enterprise cloud platform to realize resource pooling elastic management, centralized enterprise application management, unified security authentication and authorization. The system architecture is shown in Figu ...

Basic concepts Currently Ceph officially provides three ways to deploy Ceph clusters, ceph-deploy, cephadm, and manual installation ceph-deploy A cluster automation deployment tool, long-lasting, mature and stable, integrated by many automation tools for production deployment cephadm from Octopus Be ...

##Run tasks conditionally ####-Syntax of conditional tasks ######The when statement is used to run a task conditionally. It takes the condition to be tested as the value. If the conditions are met. Then run the task. If the conditions are not met, skip the task. ######Example: When when The value of is false Task execution will be skipped whe ...

1, Introduction to fire wall In Linux, the firewall strategy is implemented based on netfilter. 1. netfilter: there is a security plug-in netfilter (access control list) in the kernel. There are many detailed rules in this list. When this rule is allowed or denied, it can control whether other hosts can access, which greatly improves the s ...

1, The process by which the Linux kernel creates a new process 1. Relevant knowledge The three functions of the operating system kernel are process management, memory management and file system. The core is process managementThe state of linux process is different from the description of operating system principle. For example, the ready stat ...

Common modules of SaltStack 1. SaltSack module introduction: Module is one of the components that SaltStack contacts most in daily use. It is used to manage object operations. It is also the entrance for SaltStack to manage by pushing. For example, our daily simple tasks such as executing commands, viewing package installation and service ...

In nodea:   [preparation before experiment]   reset the virtual machine nodea first   nm-connection-editor   # configure network   hostnamectl set-hostname westoslinux117.westos.org  # Modify host name   vim /etc/sysconfig/selinux  # Close SELinux: the status changes to disabled       SELINUX ...

set/multiset container Container: set/multiset Header file: #include Basic concepts of set Introduction: All elements are automatically sorted (ascending from small to large) upon insertion Essence: set/multiset is an associative container, and its underlying structure is implemented by binary tree. Difference between set and multi ...

On Openstack network This version is Stein version and adopts OVS network Test environment: 1 control node, 2 computing nodes 1, Network structure diagram Borrow 2 online pictures Figure 1 👇: Figure 2 👇: 2, OVS analysis As shown in Figure 2 vm1 represents an instance QBR XXX stands for Linux virtual bridge You can view it through ...