接入cert-manager为域名签发免费证书 about rainbond

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Title: Access cert-manager to issue a free certificate for the domain name

1. Demand background: Major cloud vendors provide certificate purchase channels, but usually they require a budget to purchase every year, which is a large expense. For a system with a single architecture, Let's Encrypt can be used to customize the scheduled task of issuing a domain name certificate for a single domain name, and it will be automatically renewed after 90 days. However, for a large number of domain name certificates (especially SAAS service systems, users have their own domain names), this This method not only increases the occupation of server resources, but also increases the complexity of operation and maintenance, which is not conducive to management and prone to errors.
2. Alternative: cert-manager, official website access address: https://cert-manager.io/docs/getting-started
3. How to use: The current certificate management method of rainband can only store the certificate by copying the public and private keys. After the certificate expires, this action still needs to be repeated. We hope that rainband can connect to cert-manager so that users only need to fill in the domain name. It can provide users with a one-time management solution, and rainband only needs to create an issuer for this domain name. The certificate issuer will automatically renew the certificate after it expires. When rainband users use the operation farm to create a service gateway, they only need to select a domain name. The domain name certificate is provided by cert-manager