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How to Install OpenShift Origin in one node Using Ansible for Development Purposes

Assumptions:

Create a Host-Only Network in VirtualBox

Install CentOS

Configure CentOS

TYPE=Ethernet
BOOTPROTO=dhcp
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=enp0s3
DEVICE=enp0s3
ONBOOT=yes
ZONE=public

TYPE=Ethernet
BOOTPROTO=none
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=enp0s8
DEVICE=enp0s8
ONBOOT=yes
IPADDR=10.1.2.2
ZONE=public

[root@openshift sysconfig]# ping yahoo.com
PING yahoo.com (98.139.180.149) 56(84) bytes of data.
64 bytes from ir1.fp.vip.bf1.yahoo.com (98.139.180.149): icmp_seq=1 ttl=63 time=227 ms
64 bytes from ir1.fp.vip.bf1.yahoo.com (98.139.180.149): icmp_seq=2 ttl=63 time=228 ms
^C
--- yahoo.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 227.997/228.146/228.295/0.149 ms

Red-Hats-MacBook-Pro:~ bcorpus$ ping 10.1.2.2
PING 10.1.2.2 (10.1.2.2): 56 data bytes
64 bytes from 10.1.2.2: icmp_seq=0 ttl=64 time=0.454 ms
^C
--- 10.1.2.2 ping statistics ---
1 packets transmitted, 1 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.454/0.454/0.454/0.000 ms

Install OpenShift 3.9

yum -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm sed -i -e “s/^enabled=1/enabled=0/” /etc/yum.repos.d/epel.repo yum -y –enablerepo=epel install ansible pyOpenSSL cd ~ git clone https://github.com/openshift/openshift-ansible cd openshift-ansible/ git checkout release-3.9 yum install -y docker-1.13.1 systemctl start docker yum install -y NetworkManager systemctl start NetworkManager yum install -y python-passlib yum install -y java-1.8.0-openjdk-headless

cat « EOF> /etc/ansible/hosts

Create an OSEv3 group that contains the master, nodes, etcd, and lb groups.

[OSEv3:children] masters etcd nodes

Set variables common for all OSEv3 hosts

[OSEv3:vars] openshift_enable_docker_excluder=False openshift_enable_openshift_excluder=False ansible_ssh_user=root ansible_become=true #containerized=true openshift_deployment_type=origin openshift_release=3.9 openshift_clock_enabled=true ansible_service_broker_install=false openshift_enable_service_catalog=false template_service_broker_install=false

openshift_master_identity_providers=[{‘name’: ‘htpasswd_auth’, ‘login’: ‘true’, ‘challenge’: ‘true’, ‘kind’: ‘HTPasswdPasswordIdentityProvider’, ‘filename’: ‘/etc/origin/openshift-passwd’}]

Create dev and admin users

openshift_master_htpasswd_users={‘dev’: ‘$apr1$LcfsxR41$zY2JK4Bg9gXeBDKXiokRZ1’, ‘admin’: ‘$apr1$f4jGxBUp$TMIBlmIVoVf9PKHWoL4w8.’}

apply updated node defaults

openshift_node_kubelet_args={‘pods-per-core’: [‘10’], ‘max-pods’: [‘250’], ‘image-gc-high-threshold’: [‘80’], ‘image-gc-low-threshold’: [‘60’]}

osm_default_node_selector=’env=dev’ openshift_hosted_metrics_deploy=true openshift_metrics_image_version=v3.9 #openshift_hosted_logging_deploy=true

Disable some pre-flight checks

openshift_disable_check=memory_availability,disk_availability,package_version,docker_storage,docker_image_availability

default subdomain to use for exposed routes

openshift_master_default_subdomain=$HOSTNAME

Set the port of the master (default is 8443) if the master is a dedicated host

#openshift_master_api_port=443 #openshift_master_console_port=443

default project node selector

osm_default_node_selector=’env=dev’

Router selector (optional)

openshift_hosted_router_replicas=1

Registry selector (optional)

openshift_registry_selector=’env=dev’

host group for masters

[masters] $HOSTNAME

host group for etcd

[etcd] $HOSTNAME

host group for nodes, includes region info

[nodes] $HOSTNAME openshift_public_hostname=”$HOSTNAME” openshift_schedulable=true openshift_node_labels=”{‘name’: ‘master’, ‘env’: ‘dev’, ‘region’: ‘infra’}” ansible_connection=local EOF

ansible-playbook -i /etc/ansible/hosts ~/openshift-ansible/playbooks/prerequisites.yml ansible-playbook -i /etc/ansible/hosts ~/openshift-ansible/playbooks/deploy_cluster.yml

End script

- execute it using

bash install_openshift.sh


- Initially it will install some packages and update yum then reboot.
- After the reboot, run the script again.

bash install_openshift.sh


- A successful deployment should look like

Sunday 15 April 2018 23:02:41 -0400 (0:00:00.087) 0:14:21.113 **** =============================================================================== openshift_master : restart master api —————————————————————————————————————- 33.47s Run health checks (install) - EL ——————————————————————————————————————— 19.42s openshift_metrics : Create objects ——————————————————————————————————————- 18.95s openshift_hosted : Ensure OpenShift pod correctly rolls out (best-effort today) ———————————————————————- 16.95s openshift_hosted : Ensure OpenShift pod correctly rolls out (best-effort today) ———————————————————————- 16.47s openshift_service_catalog : oc_process ————————————————————————————————————— 14.34s openshift_service_catalog : wait for api server to be ready —————————————————————————————— 12.97s openshift_hosted_facts : Set hosted facts ———————————————————————————————————— 11.49s openshift_hosted_facts : Set hosted facts ———————————————————————————————————— 11.27s openshift_sanitize_inventory : pause —————————————————————————————————————– 10.08s openshift_master : restart master controllers ——————————————————————————————————— 8.31s openshift_metrics : Generating serviceaccounts for hawkular metrics/cassandra ————————————————————————- 7.20s openshift_hosted_facts : Set hosted facts ————————————————————————————————————- 7.05s openshift_metrics : slurp —————————————————————————————————————————– 7.01s openshift_metrics : Applying /tmp/openshift-metrics-ansible-8zfzlh/templates/metrics-hawkular-cassandra-svc.yaml ————————————– 6.91s restart master api ———————————————————————————————————————————— 6.78s openshift_service_catalog : Create api service ——————————————————————————————————– 6.70s openshift_hosted_facts : Set hosted facts ————————————————————————————————————- 6.53s openshift_metrics : Set serviceaccounts for hawkular metrics/cassandra ——————————————————————————– 5.98s openshift_metrics : Start Heapster ——————————————————————————————————————– 5.53s

- Login as system:admin

oc login -u system:admin


- Add admin user to admin role so that all projects will be visible in the web console.

oc adm policy add-cluster-role-to-user cluster-admin admin

- Login as admin. Password is admin

oc login -u admin


- Navigate to the web console at https://10.1.2.2:8443 and login with the credentials

username: admin password: admin

You should be able to see this:

<img src="/assets/img/openshift_ansible.png">

# Configure host directories persistent volume

- Execute the command below to create persistent volumes in the directory /var/lib/origin/openshift.local.pv

for i in seq 0 100 do mkdir -p /var/lib/origin/openshift.local.pv/pv$i chcon -u system_u -r object_r -t svirt_sandbox_file_t -l s0 /var/lib/origin/openshift.local.pv/pv$i chmod 777 /var/lib/origin/openshift.local.pv/pv$i done


- Create the PV objects in OpenShift

for i in seq 0 100 do cat « EOF | oc create -f - apiVersion: v1 kind: PersistentVolume metadata: labels: volume: pv$i name: pv$i spec: accessModes:

Congratulations! OpenShift Origin is up and running!

Written on April 13th, 2018 by Bobby Corpus
Feel free to share!

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