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Enable passing DNS info to the rkt driver #892

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merged 1 commit into from
Mar 10, 2016
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achanda
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@achanda achanda commented Mar 8, 2016

Pass DNS servers and search domains to the rkt CLI. These get written to the container's resolv.conf.

@@ -183,6 +186,20 @@ func (d *RktDriver) Start(ctx *ExecContext, task *structs.Task) (DriverHandle, e
// Add CPU isolator
cmdArgs = append(cmdArgs, fmt.Sprintf("--cpu=%vm", int64(task.Resources.CPU)))

// Add DNS servers
for _, ip := range driverConfig.DNSServers {
if net.ParseIP(ip) != nil {
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if err := net.ParseIP(ip); err != nil {
   msg := fmt.Errorf("invalid ip address for container dns server %q: %v", ip, err)
   d.logger.Printf("[ERR] driver.rkt: %v", msg)
   return msg
} else {
   cmdArgs = append(cmdArgs, fmt.Sprintf("--dns=%s", ip))
}

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dadgar commented Mar 8, 2016

LGTM

@achanda
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achanda commented Mar 9, 2016

@dadgar ParseIP returns a nil if the given string is not an IP. So, I toggled the check.

// Add DNS servers
for _, ip := range driverConfig.DNSServers {
if err := net.ParseIP(ip); err == nil {
msg := fmt.Errorf("invalid ip address for container dns server %q: %v", ip, err)
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Ah if it is will then get rid of the ": %v" part and error in the msg. And now that I think of it, make the log level DEBUG. It is not a Nomad error

dadgar added a commit that referenced this pull request Mar 10, 2016
Enable passing DNS info to the rkt driver
@dadgar dadgar merged commit e0283ab into hashicorp:master Mar 10, 2016
@achanda achanda deleted the rkt_dns branch March 10, 2016 17:14
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2 participants