orginux / lab-cluster-k8s

Kubernetes cluster based on Fedora-CoreOS

OS

docker run --interactive --rm quay.io/coreos/butane:release --pretty --strict < fcos-proxmox.yml > fcos-proxmox.ign

coreos-installer install /dev/sda -I https://raw.githubusercontent.com/orginux/lab-cluster-k8s/main/fcos-proxmox.ign

If some issues with startup OS need add:

--append-karg console=tty0

ssh -i fedora-coreos [e-mail]

Kubernetes

Prepare:

git clone [e-mail]:kubernetes-sigs/kubespray.git
git clobe [e-mail]:orginux/kubespray-inventory.git
ln -s kubespray-inventory/fcos-lab/ kubespray/inventory/

Review and change parameters under kubernetes-inventory/

Install requirements:

python3 -m venv ven
source venv/bin/activate
pip install -r requirements.txt

Deploy k8s:

ansible-playbook -i inventory/fcos-lab/inventory.ini cluster.yml

ClickHouse

Deploy CH operator Check deployment:

kubectl get deployments --namespace kube-system | grep 'clickhouse-operator'

Deploy Zookeeper:

k create ns zoons
k apply -n zoons -f https://raw.githubusercontent.com/Altinity/clickhouse-operator/master/deploy/zookeeper/quick-start-volume-emptyDir/zookeeper-1-node.yaml

For deploy used kustomize Create CH cluster:

kustomize build chi/ | k apply -f -

Try connect to CH: Terminal 1:

k port-forward service/clickhouse-simple-chi 9000:9000

Terminal 2:

docker run --network host --rm -it yandex/clickhouse-client:21.8.10.19 --host 127.0.0.1 --user clickhouse_operator --ask-password

Check cluster:

SELECT cluster, shard_num, replica_num, host_name FROM system.clusters;

Create test table

ClickHouse doc

CREATE TABLE insert_select_testtable
(
    `a` Int8,
    `b` String,
    `c` Int8
)
ENGINE = MergeTree()
ORDER BY a

INSERT INTO insert_select_testtable (*) VALUES (1, 'a', 1) ;

SELECT * FROM insert_select_testtable;

Create distributet table

https://cloud.yandex.com/en-ru/docs/managed-clickhouse/tutorials/sharding