No server certificates found in /xx/http.pem The ipa-server-certinstall command failed.

[roy liang]

https://frasertweedale.github.io/blog-redhat/posts/2019-10-24-removing-ip...
I'm going to try this scheme instead of CA
Httpd. pem ladp. Pem ladp. Pem httpd.pem ladp.I hope I can get some guidance. Thank you

1：Generate  ca-key  ca-cert 
#openssl req -new -x509 -keyout ca-key -out ca-cert -days 365

2： Generate certificate signing request:
#openssl req -new  -key ca-key -out csr.csr

3:Generate  pem
openssl req -x509  -days 365 -key ca-key -in csr.csr -out http.pem
openssl req -x509  -days 365 -key ca-key -in csr.csr -out ldap.pem


4:install freeipa
root@migration-ipa-65:~/test_ca# ipa-cacert-manage install  ca-cert 
Installing CA certificate, please wait
CA certificate successfully installed

5:install http.pem
root@migration-ipa-65:~/test_ca# ipa-server-certinstall \
>      --dirman-pass xxx \
>      --http /root/test_ca/http.pem --pin xxx 
No server certificates found in
/root/test_ca/http.pem
The ipa-server-certinstall command failed.