CentOS install DC/OS
$ sudo yum update -y && sudo yum upgrade -yPlease check your kernel version
$ uname -r
3.10.0-327.10.1.el7.x86_64Docker requirements
Docker 1.7 or greater must be installed on all bootstrap and cluster nodes.
Docker recommendations- Docker 1.9 or greater is recommended for stability reasons.
- Do not use Docker devicemapper storage driver in loop-lvm mode.
- Prefer OverlayFS or devicemapper in direct-lvm mode when choosing a production storage driver.
- Manage Docker on CentOS with systemd.
- Run Docker commands as the root user (with sudo) or as a user in the docker user group.
Setting Overlay script for CentOS7
#!/bin/bash
#####
# Basic tool
#####
yum -y install curl git tig tree vim wget
yum -y groupinstall "Development Tools"
#####
# Docker Repo
#####
DOCKER_REPO="/etc/yum.repos.d/docker.repo"
if [ -f ${DOCKER_REPO} ]; then
echo -e "\033[0;33;40mDocker Repo exist\033[0m"
echo -e "\033[0;36;40mInstall Docker Engine\033[0m"
yum install -y docker-engine
echo -e "\033[0;32;40mdone\033[0m"
else
echo -e "\033[0;36;40mSetting Docker Repo\033[0m"
tee ${DOCKER_REPO} <<-'EOF'
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/7/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg
EOF
echo -e "\033[0;32;40mdone\033[0m"
echo -e "\033[0;36;40mInstall Docker Engine\033[0m"
yum install -y docker-engine
echo -e "\033[0;32;40mdone\033[0m"
fi
sleep 2
#####
# Enable Overlay module
#####
lsmod | grep overlay >> /dev/null
check_overlay=$?
if [ ${check_overlay} = 0 ]; then
echo -e "\033[0;33;40mAlready Enabled overlay module\033[0m"
else
echo -e "\033[0;36;40mEnable overlay module\033[0m"
modprobe overlay
echo -e "\033[0;32;40mdone\033[0m"
fi
sleep 2
#####
# Setting Disk and mount
####
HDD_DEVICE="`cat /var/log/messages | grep 'unknown partition table' | awk '{print $6}' | cut -d: -f1 | head -n 1`"
OVERLAY_DIR="/var/lib/docker/overlay"
if [ -b /dev/${HDD_DEVICE}1 ]; then
echo -e "\033[0;33;40m${HDD_DEVICE}1 exist\033[0m"
else
echo -e "\033[0;36;40mFormate Disk\033[0m"
echo "n
p
1
w
"|fdisk /dev/${HDD_DEVICE}; mkfs.ext4 /dev/${HDD_DEVICE}1
echo -e "\033[0;32;40mdone\033[0m"
fi
sleep 2
if [ -d ${OVERLAY_DIR} ]; then
echo -e "\033[0;33;40m${OVERLAY_DIR} exist\033[0m"
else
echo -e "\033[0;36;40mCreating ${OVERLAY_DIR} directoy\033[0m"
mkdir -p ${OVERLAY_DIR}
echo -e "\033[0;32;40mdone\033[0m"
fi
sleep 2
cat /etc/fstab | grep 'overlay' >> /dev/null
check_uuid=$?
HDD_UUID_1="`blkid /dev/${HDD_DEVICE}1 | awk '{print $2}' | sed 's/\"//g'`"
if [ ${check_uuid} = 0 ]; then
echo -e "\033[0;33;40mfstab OK\033[0m"
else
echo -e "\033[0;36;40mSetting fstab\033[0m"
echo -n "${HDD_UUID_1} ${OVERLAY_DIR} ext4 defaults 0 2" >> /etc/fstab
mount -a
echo -e "\033[0;32;40mdone\033[0m"
fi
sleep 2
#####
# Setting Docker Engine
####
DOCKER_SERVICE="/usr/lib/systemd/system/docker.service"
grep '\-\-storage-driver=overlay' ${DOCKER_SERVICE} >> /dev/null
check_storage_driver=$?
if [ ${check_storage_driver} = 0 -a -f ${DOCKER_SERVICE} ]; then
echo -e "\033[0;33;40mDocker Storage nothing to do\033[0m"
else
echo -e "\033[0;36;40mSetting docker storage\033[0m"
sed 12d -i ${DOCKER_SERVICE}
sed "11 aExecStart=/usr/bin/docker daemon --storage-driver=overlay -H fd://" -i ${DOCKER_SERVICE} >> /dev/null
echo -e "\033[0;32;40mdone\033[0m"
fi
#####
# Enable Docker
#####
systemctl daemon-reload
systemctl start docker
On CentOS 7, firewalld must be stopped and disabled.
$ sudo systemctl stop firewalld && sudo systemctl disable firewalldData compression (advanced installer),to install these utilities on CentOS7 and RHEL7:
$ sudo yum install -y tar xz unzip curl ipsetCluster permissions (advanced installer)
On each of your cluster nodes, use the following command to:
- Disable SELinux or set it to permissive mode.
- Add nogroup to each of your Mesos masters and agents.
- Disable IPV6.
$ sudo sed -i s/SELINUX=enforcing/SELINUX=permissive/g /etc/selinux/config &&
sudo groupadd nogroup &&
sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1 &&
sudo sysctl -w net.ipv6.conf.default.disable_ipv6=1 &&
sudo reboot
Download the DC/OS installer
curl -O https://downloads.dcos.io/dcos/EarlyAccess/dcos_generate_config.shCreate a directory named genconf on your bootstrap each node.
sudo mkdir -p genconf && cd genconfCreate a ip-detect script
#!/usr/bin/env bash
set -o nounset -o errexit
export PATH=/usr/sbin:/usr/bin:$PATH
echo $(ip addr show eth0 | grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | head -1)
Create config.yaml. for exammple
---
agent_list:
- <agent_ip>
- <agent_ip>
- <agent_ip>
bootstrap_url: file:///opt/dcos_install_tmp
cluster_name: DCOS
exhibitor_storage_backend: static
ip_detect_filename: /genconf/ip-detect
master_discovery: static
master_list:
- <master_ip>
- <master_ip>
- <master_ip>
process_timeout: 10000
resolvers:
- 8.8.8.8
ssh_port: 22
ssh_user: <user_name>
Copy your private SSH key to genconf/ssh_key
$ cp <path-to-key> genconf/ssh_key && chmod 0600 genconf/ssh_key
Now you genconf will be like this and copy to each node
genconf/
├── config.yaml
├── ip-detect
└── ssh_key
$ scp -rp genconf username@<ip>:
Check help
$ sudo bash dcos_generate_config.sh --help
Running mesosphere/dcos-genconf docker with BUILD_DIR set to /home/centos/genconf
usage:
Install DC/OS
dcos_installer [-h] [-f LOG_FILE] [--hash-password HASH_PASSWORD] [-v]
[--web | --genconf | --preflight | --deploy | --postflight | --uninstall | --validate-config | --test]
Environment Settings:
PORT Set the :port to run the web UI
CHANNEL_NAME ADVANCED - Set build channel name
BOOTSTRAP_ID ADVANCED - Set bootstrap ID for build
optional arguments:
-h, --help show this help message and exit
-v, --verbose Verbose log output (DEBUG).
--offline Do not install preflight prerequisites on CentOS7,
RHEL7 in web mode
--web Run the web interface.
--genconf Execute the configuration generation (genconf).
--preflight Execute the preflight checks on a series of nodes.
--install-prereqs Install preflight prerequisites. Works only on CentOS7
and RHEL7.
--deploy Execute a deploy.
--postflight Execute postflight checks on a series of nodes.
--uninstall Execute uninstall on target hosts.
--validate-config Validate the configuration in config.yaml
--test Performs tests on the dcos_installer application
Run this command for each master and node.
sudo bash dcos_generate_config.sh --install-prereqsRun docker nginx for download install dcos_install.sh on master, and other node just download dcos_install.sh
sudo bash dcos_generate_config.sh
sudo docker run -d -p <port>:80 -v $PWD/genconf/serve:/usr/share/nginx/html:ro nginx
Create /tmp/dcos directory and download dcos_install.sh
mkdir -p /tmp/dcos && cd /tmp/dcos
curl -O http://<ip>:<port>/dcos_install.sh
sudo bash dcos_install.sh <role>
role must be master or slaveNow You can check
ZooKeeper
http://<IP>:8181/exhibitor/v1/ui/index.htmlMesos
http://<ip>:5050DC/OS
http://<ip>Reference:
https://docs.docker.com/engine/userguide/storagedriver/overlayfs-driver/https://dcos.io/I have two HDD, so I formate secondary HDD for docker storage.
