104 lines
4.1 KiB
Markdown
104 lines
4.1 KiB
Markdown
How to build a centos image which contains DC/OS 1.8.x
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======================================================
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Here is the advanced DC/OS 1.8 installation guide.
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See [Advanced DC/OS Installation Guide]
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(https://dcos.io/docs/1.8/administration/installing/custom/advanced/)
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See [Install Docker on CentOS]
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(https://dcos.io/docs/1.8/administration/installing/custom/system-requirements/install-docker-centos/)
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See [Adding agent nodes]
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(https://dcos.io/docs/1.8/administration/installing/custom/add-a-node/)
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Create a centos image using DIB following the steps outlined in DC/OS installation guide.
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1. Install and configure docker in chroot.
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2. Install system requirements in chroot.
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3. Download `dcos_generate_config.sh` outside chroot.
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This file will be used to run `dcos_generate_config.sh --genconf` to generate
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config files on the node during magnum cluster creation.
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4. Some configuration changes are required for DC/OS, i.e disabling the firewalld
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and adding the group named nogroup.
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See comments in the script file.
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Use the centos image to build a DC/OS cluster.
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Command:
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`magnum cluster-template-create`
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`magnum cluster-create`
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After all the instances with centos image are created.
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1. Pass parameters to config.yaml with magnum cluster template properties.
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2. Run `dcos_generate_config.sh --genconf` to generate config files.
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3. Run `dcos_install.sh master` on master node and `dcos_install.sh slave` on slave node.
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If we want to scale the DC/OS cluster.
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Command:
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`magnum cluster-update`
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The same steps as cluster creation.
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1. Create new instances, generate config files on them and install.
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2. Or delete those agent nodes where containers are not running.
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How to use magnum dcos coe
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===============================================
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We are assuming that magnum has been installed and the magnum path is `/opt/stack/magnum`.
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1. Copy dcos magnum coe source code
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$ mv -r /opt/stack/magnum/contrib/drivers/dcos_centos_v1 /opt/stack/magnum/magnum/drivers/
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$ mv /opt/stack/magnum/contrib/drivers/common/dcos_* /opt/stack/magnum/magnum/drivers/common/
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$ cd /opt/stack/magnum
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$ sudo python setup.py install
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2. Add driver in setup.cfg
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dcos_centos_v1 = magnum.drivers.dcos_centos_v1.driver:Driver
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3. Restart your magnum services.
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4. Prepare centos image with elements dcos and docker installed
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See how to build a centos image in /opt/stack/magnum/magnum/drivers/dcos_centos_v1/image/README.md
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5. Create glance image
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$ openstack image create centos-7-dcos.qcow2 \
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--public \
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--disk-format=qcow2 \
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--container-format=bare \
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--property os_distro=centos \
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--file=centos-7-dcos.qcow2
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6. Create magnum cluster template
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Configure DC/OS cluster with --labels
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See https://dcos.io/docs/1.8/administration/installing/custom/configuration-parameters/
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$ magnum cluster-template-create --name dcos-cluster-template \
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--image-id centos-7-dcos.qcow2 \
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--keypair-id testkey \
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--external-network-id public \
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--dns-nameserver 8.8.8.8 \
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--flavor-id m1.medium \
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--labels oauth_enabled=false \
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--coe dcos
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Here is an example to specify the overlay network in DC/OS,
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'dcos_overlay_network' should be json string format.
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$ magnum cluster-template-create --name dcos-cluster-template \
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--image-id centos-7-dcos.qcow2 \
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--keypair-id testkey \
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--external-network-id public \
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--dns-nameserver 8.8.8.8 \
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--flavor-id m1.medium \
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--labels oauth_enabled=false \
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--labels dcos_overlay_enable='true' \
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--labels dcos_overlay_config_attempts='6' \
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--labels dcos_overlay_mtu='9001' \
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--labels dcos_overlay_network='{"vtep_subnet": "44.128.0.0/20",\
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"vtep_mac_oui": "70:B3:D5:00:00:00","overlays":\
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[{"name": "dcos","subnet": "9.0.0.0/8","prefix": 26}]}' \
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--coe dcos
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7. Create magnum cluster
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$ magnum cluster-create --name dcos-cluster --cluster-template dcos-cluster-template --node-count 1
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8. You need to wait for a while after magnum cluster creation completed to make
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DC/OS web interface accessible.
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