about doh configuration

[Shuji Yoshida]

Hi,

I want to verify unbound doh.

My unbound setting is below

unbound.conf
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server:
    interface: 192.168.10.100 at 443
    tls-service-key: "/var/unbound/etc/certs/doh_privage.key"
    tls-service-pem: "/var/unbound/etc/certs/doh_server.pem"
    https-port: 443
    http-endpoint: "/dns-query"
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And I make key and certificate below command.

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# cd /var/unbound/etc/certs/
# openssl genrsa -out doh_private.key 2048
# openssl req -new -key doh_private.key -out doh_server.csr
# openssl x509 -req -in doh_server.csr -signkey doh_private.key -out doh_server.pem -outform PEM
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And boot the unbound.
But unbound cannot booted and below log is output.

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error: error for cert file: /var/unbound/etc/certs/doh_server.pem
error: error in SSL_CTX use_certificate_chain_file crypto error:02001002:system library:fopen:No such file or directory
error: and additionally crypto error:20074002:BIO routines:FILE_CTRL:system lib
error: and additionally crypto error:140DC002:SSL routines:SSL_CTX_use_certificate_chain_file:system lib
fatal error: could not set up listen SSL_CTX
--------------------------------------

What is wrong？

BR,
Syuji