The following is an example resolv.conf file for a container in a workload:

In the preceding information:
- nameserver: IP address of the DNS. Set this parameter to the cluster IP address of CoreDNS.
- search: domain name search list, which is a common suffix of Kubernetes.
- ndots: If the number of dots (.) is less than the domain name, search is preferentially used for resolution.
- timeout: timeout interval.
- single-request-reopen: indicates that different source ports are used to send different types of requests.
By default, when you create a workload on the CCE console, the preceding parameters are configured as follows:
dnsConfig:
options:
- name: timeout
value: '2'
- name: ndots
value: '5'
- name: single-request-reopen
These parameters can be optimized or modified based on service requirements.
Scenario 1: Slow External Domain Name Resolution
Optimization Solution
- If the workload does not need to access the Kubernetes Service in the cluster, see How Do I Configure a DNS Policy for a Container?
- If the number of dots (.) in the domain name used by the working Service to access other Kubernetes Services is less than 2, set ndots to 2.
Scenario 2: External Domain Name Resolution Timeout
Optimization Solution
- Generally, the timeout of a Service must be greater than the value of timeout multiplied by attempts.
- If it takes more than 2s to resolve the domain name, you can set timeout to a larger value.