116 lines
4.1 KiB
Go
116 lines
4.1 KiB
Go
// +build remoteclient
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package adapter
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import (
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"fmt"
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"os"
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"github.com/containers/libpod/cmd/podman/remoteclientconfig"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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"github.com/varlink/go/varlink"
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)
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var remoteEndpoint *Endpoint
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func (r RemoteRuntime) RemoteEndpoint() (remoteEndpoint *Endpoint, err error) {
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remoteConfigConnections, err := remoteclientconfig.ReadRemoteConfig(r.config)
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if err != nil && errors.Cause(err) != remoteclientconfig.ErrNoConfigationFile {
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return nil, err
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}
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// If the user defines an env variable for podman_varlink_bridge
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// we use that as passed.
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if bridge := os.Getenv("PODMAN_VARLINK_BRIDGE"); bridge != "" {
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logrus.Debug("creating a varlink bridge based on env variable")
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remoteEndpoint, err = newBridgeConnection(bridge, nil, r.cmd.LogLevel)
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// if an environment variable for podman_varlink_address is defined,
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// we used that as passed
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} else if address := os.Getenv("PODMAN_VARLINK_ADDRESS"); address != "" {
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logrus.Debug("creating a varlink address based on env variable: %s", address)
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remoteEndpoint, err = newSocketConnection(address)
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// if the user provides a remote host, we use it to configure a bridge connection
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} else if len(r.cmd.RemoteHost) > 0 {
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logrus.Debug("creating a varlink bridge based on user input")
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if len(r.cmd.RemoteUserName) < 1 {
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return nil, errors.New("you must provide a username when providing a remote host name")
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}
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rc := remoteclientconfig.RemoteConnection{r.cmd.RemoteHost, r.cmd.RemoteUserName, false, r.cmd.Port, r.cmd.IdentityFile, r.cmd.IgnoreHosts}
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remoteEndpoint, err = newBridgeConnection("", &rc, r.cmd.LogLevel)
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// if the user has a config file with connections in it
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} else if len(remoteConfigConnections.Connections) > 0 {
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logrus.Debug("creating a varlink bridge based configuration file")
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var rc *remoteclientconfig.RemoteConnection
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if len(r.cmd.ConnectionName) > 0 {
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rc, err = remoteConfigConnections.GetRemoteConnection(r.cmd.ConnectionName)
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} else {
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rc, err = remoteConfigConnections.GetDefault()
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}
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if err != nil {
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return nil, err
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}
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if len(rc.Username) < 1 {
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logrus.Debugf("Connection has no username, using current user %q", r.cmd.RemoteUserName)
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rc.Username = r.cmd.RemoteUserName
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}
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remoteEndpoint, err = newBridgeConnection("", rc, r.cmd.LogLevel)
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// last resort is to make a socket connection with the default varlink address for root user
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} else {
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logrus.Debug("creating a varlink address based default root address")
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remoteEndpoint, err = newSocketConnection(DefaultVarlinkAddress)
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}
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return
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}
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// Connect provides a varlink connection
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func (r RemoteRuntime) Connect() (*varlink.Connection, error) {
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ep, err := r.RemoteEndpoint()
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if err != nil {
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return nil, err
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}
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switch ep.Type {
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case DirectConnection:
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return varlink.NewConnection(ep.Connection)
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case BridgeConnection:
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return varlink.NewBridge(ep.Connection)
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}
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return nil, errors.New(fmt.Sprintf("Unable to determine type of varlink connection: %s", ep.Connection))
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}
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// RefreshConnection is used to replace the current r.Conn after things like
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// using an upgraded varlink connection
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func (r RemoteRuntime) RefreshConnection() error {
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newConn, err := r.Connect()
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if err != nil {
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return err
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}
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r.Conn = newConn
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return nil
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}
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// newSocketConnection returns an endpoint for a uds based connection
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func newSocketConnection(address string) (*Endpoint, error) {
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endpoint := Endpoint{
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Type: DirectConnection,
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Connection: address,
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}
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return &endpoint, nil
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}
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// newBridgeConnection creates a bridge type endpoint with username, destination, and log-level
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func newBridgeConnection(formattedBridge string, remoteConn *remoteclientconfig.RemoteConnection, logLevel string) (*Endpoint, error) {
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endpoint := Endpoint{
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Type: BridgeConnection,
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}
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if len(formattedBridge) < 1 && remoteConn == nil {
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return nil, errors.New("bridge connections must either be created by string or remoteconnection")
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}
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if len(formattedBridge) > 0 {
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endpoint.Connection = formattedBridge
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return &endpoint, nil
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}
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endpoint.Connection = formatDefaultBridge(remoteConn, logLevel)
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return &endpoint, nil
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}
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