openssl.conf

# environment variable values
BASE_DOMAIN=
CLUSTER_NAME=
CERT_DIR=
APISERVER_CLUSTER_IP=
MASTER_NAME=

[ ca ]
# `man ca`
default_ca = CA_default

[ CA_default ]
# Directory and file locations.
dir               = ${ENV::CERT_DIR}
certs             = $dir
crl_dir           = $dir/crl
new_certs_dir     = $dir
database          = $dir/index.txt
serial            = $dir/serial
# certificate revocation lists.
crlnumber         = $dir/crlnumber
crl               = $dir/crl/intermediate-ca.crl
crl_extensions    = crl_ext
default_crl_days  = 30
default_md        = sha256

name_opt          = ca_default
cert_opt          = ca_default
default_days      = 375
preserve          = no
policy            = policy_loose

[ policy_loose ]
# Allow the CA to sign a range of certificates.
countryName             = optional
stateOrProvinceName     = optional
localityName            = optional
organizationName        = optional
organizationalUnitName  = optional
commonName              = supplied
emailAddress            = optional

[ req ]
# `man req`
default_bits        = 4096
distinguished_name  = req_distinguished_name
string_mask         = utf8only
default_md          = sha256

[ req_distinguished_name ]
countryName                    = Country Name (2 letter code)
stateOrProvinceName            = State or Province Name
localityName                   = Locality Name
0.organizationName             = Organization Name
organizationalUnitName         = Organizational Unit Name
commonName                     = Common Name

# Certificate extensions (`man x509v3_config`)

[ v3_ca ]
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid:always,issuer
basicConstraints = critical, CA:true, pathlen:0
keyUsage = critical, digitalSignature, cRLSign, keyCertSign

[ client_cert ]
basicConstraints = CA:FALSE
nsCertType = client
nsComment = "OpenSSL Generated Client Certificate"
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer
keyUsage = critical, nonRepudiation, digitalSignature, keyEncipherment
extendedKeyUsage = clientAuth

[ server_cert ]
basicConstraints = CA:FALSE
nsCertType = server
nsComment = "OpenSSL Generated Server Certificate"
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer:always
keyUsage = critical, digitalSignature, keyEncipherment
extendedKeyUsage = serverAuth

[ identity_server_cert ]
basicConstraints = CA:FALSE
nsCertType = server
nsComment = "OpenSSL Generated Server Certificate"
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer:always
keyUsage = critical, digitalSignature, keyEncipherment
extendedKeyUsage = serverAuth
subjectAltName = DNS.1:tectonic-identity-api.tectonic-system.svc.cluster.local

[ etcd_server_cert ]
basicConstraints = CA:FALSE
nsCertType = server
nsComment = "OpenSSL Generated Server Certificate"
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer:always
keyUsage = critical, digitalSignature, keyEncipherment
extendedKeyUsage = serverAuth
subjectAltName = DNS.1:*.${ENV::BASE_DOMAIN}

[ etcd_peer_cert ]
basicConstraints = CA:FALSE
nsCertType = server
nsComment = "OpenSSL Generated Server Certificate"
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer:always
keyUsage = critical, digitalSignature, keyEncipherment
extendedKeyUsage = serverAuth, clientAuth
subjectAltName = DNS.1:*.${ENV::BASE_DOMAIN}

[ apiserver_cert ]
basicConstraints = CA:FALSE
nsCertType = server
nsComment = "OpenSSL Generated Server Certificate"
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer:always
keyUsage = critical, digitalSignature, keyEncipherment
extendedKeyUsage = serverAuth, clientAuth
subjectAltName = @apiserver_names

[ master_component_client_cert ]
basicConstraints = CA:FALSE
nsCertType = client
nsComment = "OpenSSL Generated Client Certificate"
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer
keyUsage = critical, nonRepudiation, digitalSignature, keyEncipherment
extendedKeyUsage = clientAuth
subjectAltName = @master_names

[apiserver_names]
DNS.1 = ${ENV::CLUSTER_NAME}-api.${ENV::BASE_DOMAIN}
DNS.2 = ${ENV::MASTER_NAME}.${ENV::BASE_DOMAIN}
DNS.3 = kubernetes
DNS.4 = kubernetes.default
DNS.5 = kubernetes.default.svc
DNS.6 = kubernetes.default.svc.cluster.local
IP.1 = ${ENV::APISERVER_CLUSTER_IP}

[ master_names ]
DNS.1 = ${ENV::MASTER_NAME}.${ENV::BASE_DOMAIN}