Failed to connect to opensearch in TLS mode

[Sidhartha-Biswal]

Hi,
I am trying to connect with opensearch using the below exporter option.
exporters:
opensearch/trace:
endpoint: myserver:9200
tls:
insecure: false
ca_file: ca.crt
cert_file: client.crt
key_file: client.key

The installation of opentelemetry-collector service is failing and the below error is showing in the logs.

Error: cannot start pipelines: failed to load TLS config: failed to load CA CertPool File: failed to load cert ca.crt: open ca.crt: no such file or directory; failed to shutdown pipelines: no existing monitoring routine is running; no existing monitoring routine is running
2024/03/27 12:58:11 collector server run finished with error: cannot start pipelines: failed to load TLS config: failed to load CA CertPool File: failed to load cert ca.crt: open ca.crt: no such file or directory; failed to shutdown pipelines: no existing monitoring routine is running; no existing monitoring routine is running

Could you please suggest something?