mirror of
https://github.com/rancher/os.git
synced 2025-06-25 22:41:36 +00:00
83 lines
2.3 KiB
Go
83 lines
2.3 KiB
Go
package network
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import (
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"golang.org/x/net/context"
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"github.com/rancher/os/pkg/docker"
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"github.com/rancher/os/pkg/log"
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"io/ioutil"
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"github.com/docker/libnetwork/resolvconf"
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"github.com/rancher/os/config"
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"github.com/rancher/os/pkg/hostname"
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"github.com/rancher/os/pkg/netconf"
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)
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func Main() {
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log.InitLogger()
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cfg := config.LoadConfig()
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ApplyNetworkConfig(cfg)
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log.Infof("Restart syslog")
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client, err := docker.NewSystemClient()
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if err != nil {
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log.Error(err)
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}
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if err := client.ContainerRestart(context.Background(), "syslog", 10); err != nil {
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log.Error(err)
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}
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select {}
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}
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func ApplyNetworkConfig(cfg *config.CloudConfig) {
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log.Infof("Apply Network Config")
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userSetDNS := len(cfg.Rancher.Network.DNS.Nameservers) > 0 || len(cfg.Rancher.Network.DNS.Search) > 0
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if err := hostname.SetHostnameFromCloudConfig(cfg); err != nil {
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log.Errorf("Failed to set hostname from cloud config: %v", err)
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}
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userSetHostname := cfg.Hostname != ""
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if cfg.Rancher.Network.DHCPTimeout <= 0 {
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cfg.Rancher.Network.DHCPTimeout = cfg.Rancher.Defaults.Network.DHCPTimeout
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}
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dhcpSetDNS, err := netconf.ApplyNetworkConfigs(&cfg.Rancher.Network, userSetHostname, userSetDNS)
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if err != nil {
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log.Errorf("Failed to apply network configs(by netconf): %v", err)
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}
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if dhcpSetDNS {
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log.Infof("DNS set by DHCP")
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}
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if !userSetDNS && !dhcpSetDNS {
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// only write 8.8.8.8,8.8.4.4 as a last resort
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log.Infof("Writing default resolv.conf - no user setting, and no DHCP setting")
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if _, err := resolvconf.Build("/etc/resolv.conf",
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cfg.Rancher.Defaults.Network.DNS.Nameservers,
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cfg.Rancher.Defaults.Network.DNS.Search,
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nil); err != nil {
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log.Errorf("Failed to write resolv.conf (!userSetDNS and !dhcpSetDNS): %v", err)
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}
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}
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if userSetDNS {
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if _, err := resolvconf.Build("/etc/resolv.conf", cfg.Rancher.Network.DNS.Nameservers, cfg.Rancher.Network.DNS.Search, nil); err != nil {
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log.Errorf("Failed to write resolv.conf (userSetDNS): %v", err)
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} else {
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log.Infof("writing to /etc/resolv.conf: nameservers: %v, search: %v", cfg.Rancher.Network.DNS.Nameservers, cfg.Rancher.Network.DNS.Search)
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}
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}
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resolve, err := ioutil.ReadFile("/etc/resolv.conf")
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log.Debugf("Resolve.conf == [%s], %v", resolve, err)
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log.Infof("Apply Network Config SyncHostname")
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if err := hostname.SyncHostname(); err != nil {
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log.Errorf("Failed to sync hostname: %v", err)
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}
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}
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