Failed to pull image "harbor.net.com/demos/saas.demo.api:latest": failed to pull and unpack image "harbor.net.com/demos/saas.demo.api:latest": failed to resolve reference "harbor.net.com/demos/saas.demo.api:latest": failed to do request: Head "https://harbor.net.com/v2/demos/saas.demo.api/manifests/latest": tls: failed to verify certificate: x509: certificate signed by unknown authority
解决办法：
将harbor ca.crt证书拷贝到k3s服务器上
harbor 服务器
k3s服务器
sudo cp ca.crt /usr/local/share/ca-certificates/
sudo update-ca-certificates
sudo systemctl restart k3s
