CentOS7_Install_Docker_and_docker-compose

Install Docker

# Install Docker CE
## Set up the repository
### Install required packages.
yum install yum-utils device-mapper-persistent-data lvm2

### Add Docker repository.
yum-config-manager \
  --add-repo \
  https://download.docker.com/linux/centos/docker-ce.repo

yum update && yum install docker-ce-18.06.2.ce
# If you are going to use local rpm to install Docker, follow steps below:
# First copy docker rpms from 10.20.0.198:/root/rpms/docker
# mkdir -pv /root/rpms/docker && \
# scp -r root@10.20.0.198:/root/rpms/docker /root/rpms/docker && \
# cd /root/rpms/docker && \
# yum localinstall ./*.rpm

# Add your user to the docker group with the following command.
usermod -aG docker $(whoami)

## Create /etc/docker directory.
mkdir -pv /etc/docker

# Setup daemon.
cat > /etc/docker/daemon.json <<EOF
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "20m"
  },
  "storage-driver": "overlay2",
  "storage-opts": [
    "overlay2.override_kernel_check=true"
  ]
}
EOF

mkdir -p /etc/systemd/system/docker.service.d

# Don't forget to set SELinux to permissive:
# Set SELinux in permissive mode (effectively disabling it)
setenforce 0
sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config

# Set Docker to start automatically at boot time:
systemctl enable docker.service

# Restart Docker
systemctl daemon-reload
systemctl restart docker

# Check docker daemon info
docker info

# Check if docker runs normally
docker run --rm --name=hello-world hello-world

Install docker-compose

1. Run this command to download the current stable release of Docker Compose:

   sudo curl -L "https://github.com/docker/compose/releases/download/1.24.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

2. Apply executable permissions to the binary:

   sudo chmod +x /usr/local/bin/docker-compose

   Note: If the command docker-compose fails after installation, check your path.
   You can also create a symbolic link to /usr/bin or any other directory in your path.

   For example:

   sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose

3. Test the installation.

   $ docker-compose --version
   docker-compose version 1.24.1, build 1110ad01