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podman: relay custom DNS servers to network stack

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Aardvark-dns and netavark now accepts custom DNS servers for containers
via new config field `dns_servers`. New field allows containers to use
custom resolvers instead of host's default resolvers.

Following commit instruments libpod to pass these custom DNS servers set
via `--dns` or central config to the network stack.

Depends-on:
* Common: containers/common#1189
* Netavark: containers/netavark#452
* Aardvark-dns: containers/aardvark-dns#240

Signed-off-by: Aditya R <arajan@redhat.com>
This commit is contained in:
Aditya R
2022-11-20 07:33:19 +05:30
parent 8252dcceb3
commit 366e1686a0
1 changed files with 6 additions and 0 deletions
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6
libpod/networking_common.go
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@ -39,9 +39,15 @@ func (c *Container) convertPortMappings() []types.PortMapping {
}
func (c *Container) getNetworkOptions(networkOpts map[string]types.PerNetworkOptions) types.NetworkOptions {
nameservers := make([]string, 0, len(c.runtime.config.Containers.DNSServers)+len(c.config.DNSServer))
nameservers = append(nameservers, c.runtime.config.Containers.DNSServers...)
for _, ip := range c.config.DNSServer {
nameservers = append(nameservers, ip.String())
}
opts := types.NetworkOptions{
ContainerID: c.config.ID,
ContainerName: getNetworkPodName(c),
DNSServers: nameservers,
}
opts.PortMappings = c.convertPortMappings()