Rich Megginson (richmegginson) wrote,
Rich Megginson
richmegginson

How to print field name with dash ("-") in a golang template

For example, let's say your OpenShift secret has been created like this:
$ oc secrets new logging-elasticsearch \
        key=$dir/keystore.jks truststore=$dir/truststore.jks \
        searchguard.key=$dir/searchguard_node_key \
        searchguard.truststore=$dir/searchguard_node_truststore \
        admin-key=$dir/${admin_user}.key admin-cert=$dir/${admin_user}.crt \
        admin-ca=$dir/ca.crt \
        admin.jks=$dir/${admin_user}.jks

Now you want to extract the CA cert:
$ oc get secret logging-elasticsearch --template='{{.data.admin-ca}}'
error: error parsing template {{.data.admin-ca}}, template: output:1: bad character U+002D '-'

It doesn't like the - character in the field name. You can work around this using index like so:
$ oc get secret logging-elasticsearch --template='{{index .data "admin-ca"}}' |base64 -d > ca
$ openssl x509 -in ca -text|more
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number: 1 (0x1)
    Signature Algorithm: sha256WithRSAEncryption
        Issuer: CN=logging-signer-20160915173520
        Validity
            Not Before: Sep 15 17:35:19 2016 GMT
            Not After : Sep 14 17:35:20 2021 GMT
        Subject: CN=logging-signer-20160915173520
        Subject Public Key Info:
Tags: golang, openshift, templates
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