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Merge pull request #2337 from thaJeztah/carry_2293_add_host_gateway_dns_entry 

Skip IPAddr validation for "host-gateway" string
This commit is contained in:
Silvin Lubecki 2020-02-27 17:58:22 +01:00 committed by GitHub
parent c3b48c5c9c 67ebcd6dcf
commit 2298e6a3fe
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 2 deletions
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13
opts/hosts.go
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@ -24,6 +24,12 @@ var (
DefaultTLSHost = fmt.Sprintf("tcp://%s:%d", DefaultHTTPHost, DefaultTLSHTTPPort)
// DefaultNamedPipe defines the default named pipe used by docker on Windows
DefaultNamedPipe = `//./pipe/docker_engine`
// hostGatewayName defines a special string which users can append to --add-host
// to add an extra entry in /etc/hosts that maps host.docker.internal to the host IP
// TODO Consider moving the HostGatewayName constant defined in docker at
// github.com/docker/docker/daemon/network/constants.go outside of the "daemon"
// package, so that the CLI can consume it.
hostGatewayName = "host-gateway"
)
// ValidateHost validates that the specified string is a valid host and returns it.
@ -160,8 +166,11 @@ func ValidateExtraHost(val string) (string, error) {
if len(arr) != 2 || len(arr[0]) == 0 {
return "", fmt.Errorf("bad format for add-host: %q", val)
}
if _, err := ValidateIPAddress(arr[1]); err != nil {
return "", fmt.Errorf("invalid IP address in add-host: %q", arr[1])
// Skip IPaddr validation for "host-gateway" string
if arr[1] != hostGatewayName {
if _, err := ValidateIPAddress(arr[1]); err != nil {
return "", fmt.Errorf("invalid IP address in add-host: %q", arr[1])
}
}
return val, nil
}