The DaemonSet "datadog-agent" is invalid:
* spec.template.spec.volumes[4].configMap.items[0].path: Invalid value: "/apache.d/conf.yaml": must be a relative path
* spec.template.spec.volumes[4].configMap.items[1].path: Invalid value: "/http_check.d/conf.yaml": must be a relative path
* spec.template.spec.containers[0].volumeMounts[3].name: Not found: "httpd-config-map"

# ls -lrt /conf.d/http_check.d/ /etc/datadog-agent/conf.d/http_check.d

/conf.d/http_check.d/:
total 4
-rw-r--r-- 1 root root 162 Jun 17 07:42 auto_conf.yaml

/etc/datadog-agent/conf.d/http_check.d:
total 16
-rw-rw-r-- 1 dd-agent root 14342 Jun 11 23:37 conf.yaml.example

# find . -name auto_conf.yaml | grep http
./conf.d/..2020_06_17_07_42_57.685286965/http_check.d/auto_conf.yaml