Preparation¶
This page explains the preparation required for deploying DCE 5.0 Enterprise package.
Host Requirements¶
All-in-One Mode¶
Refer to All-in-One Mode.
| Number | Server Role | Server Purpose | CPU Cores | Memory | System Disk | Unpartitioned Disk |
|---|---|---|---|---|---|---|
| 1 | all in one | image repository, chart museum, global cluster | 16 | 32G | 200G | 400G |
4-Nodes Mode¶
Refer to 4 Nodes Mode.
| Number | Server Role | Server Purpose | CPU Cores | Memory | System Disk | Unpartitioned Disk |
|---|---|---|---|---|---|---|
| 1 | Bootstraping Node | 1. Run installation and deployment procesures 2. Host image registry and chart museum required by DCE 5.0 | 2 | 4G | 200G | - |
| 3 | Controller Node | 1. Run DCE 5.0 submodules 2. Run Kubernetes system components | 8 | 16G | 100G | 200G |
7-Nodes Mode¶
Refer to 7 Nodes Mode.
| Number | Server Role | Server Purpose | CPU Cores | Memory | System Disk | Unpartitioned Disk |
|---|---|---|---|---|---|---|
| 1 | Bootstraping Node | 1. Run installation and deployment procedures 2. Host image registry and chart museum required by DCE 5.0 | 2 | 4G | 200G | - |
| 3 | Controller Node | 1. Run DCE 5.0 submodules 2. Run Kubernetes system components | 8 | 16G | 100G | 200G |
Prerequisites Check¶
Machine Check¶
| Check Item | Requirements | Description |
|---|---|---|
| User Permissions | root | Use root root account to install DCE 5.0, and the root user must be allowed to log into all all servers by SSH. |
| Swap | Turn off | If it's turned on, the system may experience an I/O surge, causing the container runtime crash. |
| Firewall | Turn off (not mandatory) | - |
| Selinux | Turn off (not mandatory) | - |
| Time syn | All nodes must have synchronized time. | This is explicitly required by Docker and Kubernetes. Otherwise, kube.conf will report an error ofUnable to connect to the server: x509: certificate has expired or is not yet. |
| Time zone | The time zone of all servers must be consistent. | It is recommended to set as Asia/Shanghai. Command: timedatectl set-timezone Asia/Shanghai |
| Nameserver | /etc/resolv.conf must have at least one nameserver. | Required for CoreDNS, otherwise there will be an error. This nameserver can be a non-existent IP address in a pure offline environment. Centos8minial does not have the /etc/resolv file by default and needs to be created manually. |
Bootstraping Node Dependency Check¶
| Check Item | Versions | Description |
|---|---|---|
| podman | v4.4.1 | - |
| helm | ≥ 3.11.1 | - |
| skopeo | ≥ 1.11.1 | - |
| kind | v0.17.0 | - |
| kubectl | ≥ 1.25.6 | - |
| yq | ≥ 4.31.1 | - |
| MinIO client | - | `mc.RELEASE.2023-02-16T |
If these dependencies have not been installed, refer to Install Dependencies。
# download install script
curl -LO https://qiniu-download-public.daocloud.io/DaoCloud_Enterprise/dce5/install_prerequisite.sh
# add execution permission
chmod +x install_prerequisite.sh
# start install
bash install_prerequisite.sh online full