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Setting up the security mechanism of docker Container permissions Set the container to run at privilege level: - privileged=true sometimes we need the container to have more permissions For example, operating kernel module, controlling swap partition, mounting USB disk, modifying MAC address, etc. [root@foundation7 ...

Configure the highly available yum source on [server1] and [server4] [root@server1 ~]# vim /etc/yum.repos.d/rhel-source.repo [rhel-source] name=Red Hat Enterprise Linux $releasever - $basearch - Source baseurl=http://172.25.40.250/rhel6.5 enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release [HighA ...

Catalog 1 Preface 2 Operating system environment settings 2.1 Host and Operating System 2.2 Set Host Name 2.3 Setting up DNS 2.4 Close the firewall 2.5 Turn off selinux 2.6 Turn off swap 3 Operating system software installation 4 Install docker 5 Install docker-compose 5.1 jsonschema version mismatch 5.2 cffi version mismatch 5.3 dnspython ver ...

1. Difference between Yum and rpm The yum command will find the dependency from the image itself when installing the software, and then resolve it. If it fails to resolve it, an error will be reported The rpm command does not solve the dependency when installing the software. It is applicable to the installation of all softw ...

MMM Cluster Architecture Overview Mmm (Master Master replication manager Mysql) is a set of flexible script program based on perl, which is used to monitor and migrate mysql replication, and manage the configuration of Mysql master replication (only one node is writable at the same time). MMM high availability architecture description Mmm M ...

I. system environment Centos7 Two, installation   $ yum install -y firewalld III. basic startup command   $ systemctl status firewalld # View state $ systemctl start firewalld # start-up $ systemctl stop firewalld #Close $ systemctl enable firewalld ...

1. Install yum repo There is no mysql in the yum source of centos (you can try to use the installation command directly: Yum install mysql server). You need to download the yum repo configuration file on mysql's official website, and then install: #download wget https://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm #repo inst ...

keepalived overview The function of Keepalived is to detect the state of the server. If a web server goes down or fails to work, Keepalived will detect it and remove the failed server from the system. At the same time, other servers will be used to replace the server's work. When the server works normally, Keepalived will automatically add the ...

Preparation of system bottom layer Install jdk tar xvf jdk-7u79-linux-x64.tar.gz vi /etc/profile #Set JDK environment variable: add JDK environment variable setting at the end of vi /etc/profile: JAVA_HOME=/usr/local/java JRE_HOME=/usr/local/java/jre CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME ...

How to build an enterprise CA certificate server? Define system environment: CentOS 7.4 ca.com     192.168.80.181   openssl* mail.com   192.168.80.182  dovecot* client.com  192.168.80.183 mutt* Modify three host names: ①hostnamectl set-hostname    xx.com  exit logout Reconnect ② vi /etc/hosts    192.168.80.181 ca.com   192.168.80.182 mai ...