ansible configuration management example

Preface: This blog is mainly to introduce composer installation and use, and load Phpmailer code library as an example for everyone to do a demo. Environment: Centos7 + LAMP Because of the example involved in PHP email, so before starting this blog, we suggest that you first read my previous blog: "PHP use Phpmailer with QQ mailbox implementation of email ," A, prepare to work: Now we create a new testmail

/init.d/mysqld Start The/USR/LOCAL/MYSQL/BIN/NDBD can be added to the/etc/rc.local to boot up. Note: You need to use--initial parameters only when you first start ndbd or when you make changes to Server3 Config.ini! V. Check the status of work ================ Go back to the Management node server Server3 and start the management terminal: #/USR/BIN/NDB_MGM Type show command to view current work

the client, and the DHCP discovery process ends Note: DHCP is on the other side of the router across the network segment, the router needs to turn on DHCP relay to support forwarding the client Discover broadcast packets to the DHCP server, which are unicast via router forwarding Because the connection between the router and DHCP has IP information. DHCP Server Port UDP 67 DHCP Client Port UDP 68 DHCP Reservation: Address reservation: Addresses that are specific to a particular client sho

Spring and MyBatis multi-data source configuration and management, springmybatis The same project sometimes involves multiple databases, that is, multiple data sources. Multiple data sources can be divided into two situations: 1) two or more databases are independent of each other and can be developed as two projects. For example, in game development, a database

information, Performance statistics, bit switching, seamless rate adaptation, and whether the grille-coded switch is open.2) Display Interface ATM Interface-number: View configuration and performance statistics for VDSL interfaces in ATM mode3) Display Interface Ethernet Interface-number: View configuration and status information for the VDSL interface in the PTM operating mode.5, VDSL interface Upstream

In view of the stability of the system and the value of resource utilization, if you play a period of time in the Web panel or a key package of VPS enthusiasts, it is still recommended to play their own compile the installation site environment. One can learn, and secondly can also improve skills, such as people ask you what panel management VPS, you say without panels, pure handmade, is not very powerful look? This is not the old left in t

example: Format 1 with Format 2 is configured as follows:address0=192.168.0.0netmaske0=255.255.255.0gateway0=172.6.100.1775, Iproute2 (IP,SS): Pay attention to more complex use less.6, network management or monitoring of the relevant tools:Ping:-C (count): Specifies the number of pings. such as: Ping-c 2 www.baidu.comTraceroute: Gets the route (gateway) that passes from the current host to the destination

personnel cost required; 5. reduces the impact of SCM system faults. 6. the SCM type can be flexibly selected by the project team. However, local unification also has drawbacks. 1. failure of the SCM system will still affect the normal operation of some projects; 2. the workload of the SCM management organization cannot be estimated; for example, configuration o

ip:61.1.1.3 (VS_SQUID), there is a server pool (POOL_SQUID) under the virtual IP. The server pool consists of two real squid servers (192.168.1.11 and 192.168.1.12).②, if the squid cache misses, the F5 intranet virtual ip:192.168.1.3 (Vs_apache) is requested, and there is a default server pool (Pool_apache_default) under the virtual IP. The server pool contains two real Apache servers (192.168.1.21 and 192.168.1.22), and when the virtual IP matches the irules rule, another server pool (pool_apa

Two kinds of process management modes in PHP-FPMThe number of PHP-FPM processes can also be divided according to the settings Dynamic and StaticOf One is to directly open a specified number of PHP-FPM processes, no longer increase or decrease; The other is to start a certain number of php-fpm process, when the request is large, dynamic increase in the number of PHP-FPM process to the upper limit, when the idle time automatically free to release the nu

not need to be introduced into the package,2. First, find your service implementation class, plus @Transactional annotations, if you add to the class, then all the methods of the class will be managed by the transaction, if you add to the method, then only the method conforms to the specific transaction. Of course, we are generally added to the method. Because only the increase, deletion and change will require business. For example, the following me

network any computer terminal through the browser login system configuration server, after the authentication, The whole SoftSwitch network can be configured and managed (for example: System network element parameter and performance configuration management) and daily maintenance work (for

-IP LTM v9.x:①, assuming that the domain name blog.s135.com is resolved to F5 's extranet/public virtual ip:61.1.1.3 (VS_SQUID), there is a server pool (POOL_SQUID) under the virtual IP. The server pool consists of two real squid servers (192.168.1.11 and 192.168.1.12).②, if the squid cache misses, the F5 intranet virtual ip:192.168.1.3 (Vs_apache) is requested, and there is a default server pool (Pool_apache_default) under the virtual IP. The server pool contains two real Apache servers (192.16

Yarn memory allocation management mechanism and related parameter configuration, yarn Mechanism Understanding the memory management and allocation mechanism of Yarn is particularly important for us to build and deploy clusters, develop and maintain applications, and I have done some research for your reference.I. Related configurations Yarn memory allocation and

I. WEB server and Apache1. web servers and URLs2. Apache history3. SupplementHttp://www.netcraft.com/market share of apacheserverAt the same time, it must be noted that ngnix is in a period of strong growth, and it is a great feeling of competing with apache in the world. It is really awesome ~~~Ii. Apache server management commands1. Command start: service httpd start/stop/restart/reload/condrestart/status/configtest/graceful/help2. start the Script:

1. Write an example of transaction management using AOP today, and the following are the first things you need to know about transactions(1) Characteristics of the transaction Atomicity (atomicity): A transaction is an atomic operation that consists of a series of actions. The atomicity of a transaction ensures that the action is either complete or completely ineffective. Consistency (consisten

statistics on the interface.4, the POS interface physical Parameters configuration example :Two devices connected through the SONET network, AR20 complete the following parameter settings, in order to ensure successful docking, need to complete the R19 POS interface configuration:1) the R20 POS interface frame format is SONET.2) R20 POS Interface Link layer prot