Prerequisites

• install sealer in your machine
• if your want to run cloud image on alibaba cloud, need AK,SK first.

Overview

We choose OpenEBS Jiva or OpenEBS LocalPV as default persistence storage to enable Stateful applications to easily access Dynamic Local PVs or Replicated PVs. More details about the application can be found in its manifest directory.

Cloud image list

Install tools image

• registry.cn-qingdao.aliyuncs.com/sealer-apps/helm:v3.6.0

Infra image

• registry.cn-qingdao.aliyuncs.com/sealer-apps/openebs-cstor:2.11.0
• registry.cn-qingdao.aliyuncs.com/sealer-apps/openebs-jiva:2.11.0
• registry.cn-qingdao.aliyuncs.com/sealer-apps/openebs-localpv:2.11.0
• registry.cn-qingdao.aliyuncs.com/sealer-apps/ingress-nginx-controller:v1.0.0
• registry.cn-qingdao.aliyuncs.com/sealer-apps/ceph-block:v16.2.5
• registry.cn-qingdao.aliyuncs.com/sealer-apps/ceph-file:v16.2.5
• registry.cn-qingdao.aliyuncs.com/sealer-apps/ceph-object:v16.2.5
• registry.cn-qingdao.aliyuncs.com/sealer-apps/minio:2021.6.17
• registry.cn-beijing.aliyuncs.com/mahmut/longhorn:v1.2.3

Database image

• registry.cn-qingdao.aliyuncs.com/sealer-apps/mysql:8.0.26
• registry.cn-qingdao.aliyuncs.com/sealer-apps/redis:6.2.5
• registry.cn-qingdao.aliyuncs.com/sealer-apps/mongodb:4.4.8
• registry.cn-qingdao.aliyuncs.com/sealer-apps/postgresql:11.12.0
• registry.cn-qingdao.aliyuncs.com/sealer-apps/cassandra:4.0.0
• registry.cn-qingdao.aliyuncs.com/sealer-apps/tidb:v1.2.1
• registry.cn-qingdao.aliyuncs.com/sealer-apps/cockroach:v21.1.7

Message queue image

• registry.cn-qingdao.aliyuncs.com/sealer-apps/kafka:2.8.0
• registry.cn-qingdao.aliyuncs.com/sealer-apps/zookeeper:3.7.0
• registry.cn-qingdao.aliyuncs.com/sealer-apps/rocketmq:4.5.0

Application image

• registry.cn-qingdao.aliyuncs.com/sealer-apps/dashboard:v2.2.0
• registry.cn-qingdao.aliyuncs.com/sealer-apps/prometheus-stack:v2.28.1
• registry.cn-qingdao.aliyuncs.com/sealer-apps/loki-stack-promtail:v2.2.0
• registry.cn-qingdao.aliyuncs.com/sealer-apps/loki-stack-fluentbit:v2.2.0
• registry.cn-beijing.aliyuncs.com/mahmut/kube-prometheus-stack:0.53.1
• registry.cn-beijing.aliyuncs.com/mahmut/loki-stack-fluentbit:2.2.0
• registry.cn-beijing.aliyuncs.com/mahmut/loki-stack-promtail:2.2.0
• registry.cn-beijing.aliyuncs.com/mahmut/skywaking:8.0.1

How to run it

Apply a cluster

you can modify the image name and save it as "clusterfile.yaml", then run sealer apply cmd sealer apply -f clusterfile.yaml

apiVersion: sealer.cloud/v2
kind: Cluster
metadata:
  creationTimestamp: null
  name: my-cluster
spec:
  hosts:
    - ips: [ 192.168.0.2 ]
      roles: [ master ] # add role field to specify the node role
      env: # rewrite some nodes has different env config
        - etcd-dir=/data/etcd
      ssh: # rewrite ssh config if some node has different passwd...
        user: xxx
        passwd: xxx
        port: "2222"
    - ips: [ 192.168.0.3 ]
      roles: [ node,db ]
  image: kubernetes:v1.19.8
  ssh:
    encrypted: true
    passwd: xxxxx
    pk: /root/.ssh/id_rsa
    port: "22"
    user: root

if you want to apply a cloud image which need persistence storage. we provide openebs as cloud storage backend. OpenEBS provides block volume support through the iSCSI protocol. Therefore, the iSCSI client (initiator) presence on all Kubernetes nodes is required. Choose the platform below to find the steps to verify if the iSCSI client is installed and running or to find the steps to install the iSCSI client.For openebs, different storage engine need to config different prerequisite. more to see openebs website.

We provide plugin mechanism, you only need to append below example to "clusterfile.yaml" and apply them together.

For example, if we use jiva engine as storage backend :

apiVersion: sealer.aliyun.com/v1alpha1
kind: Plugin
metadata:
  name: SHELL
spec:
  action: PostInstall
  on: role=node
  type: SHELL
  data: |
    if type yum >/dev/null 2>&1;then
    yum -y install iscsi-initiator-utils
    systemctl enable iscsid
    systemctl start iscsid
    elif type apt-get >/dev/null 2>&1;then
    apt-get update
    apt-get -y install open-iscsi
    systemctl enable iscsid
    systemctl start iscsid
    fi
---

How to use it

See README.md of each application for more details.

How to rebuild it

Use it as base image to build another useful image. See each manifest yaml file under application manifest directory for details , and modify it according to your needs.

For example, use manifest to build a mysql CloudImage:

Kubefile:

FROM kubernetes:v1.19.8
COPY mysql.yaml manifests
CMD kubectl apply -f manifests/mysql.yaml

Then run below command to rebuild it

sealer build -t {Your Image Name} -f Kubefile