872 lines
24 KiB
Go
872 lines
24 KiB
Go
package plugin
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import (
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"bufio"
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"context"
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"crypto/subtle"
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"crypto/tls"
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"errors"
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"fmt"
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"hash"
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"io"
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"io/ioutil"
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"net"
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"os"
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"os/exec"
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"path/filepath"
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"strconv"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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"unicode"
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hclog "github.com/hashicorp/go-hclog"
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)
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// If this is 1, then we've called CleanupClients. This can be used
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// by plugin RPC implementations to change error behavior since you
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// can expected network connection errors at this point. This should be
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// read by using sync/atomic.
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var Killed uint32 = 0
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// This is a slice of the "managed" clients which are cleaned up when
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// calling Cleanup
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var managedClients = make([]*Client, 0, 5)
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var managedClientsLock sync.Mutex
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// Error types
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var (
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// ErrProcessNotFound is returned when a client is instantiated to
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// reattach to an existing process and it isn't found.
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ErrProcessNotFound = errors.New("Reattachment process not found")
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// ErrChecksumsDoNotMatch is returned when binary's checksum doesn't match
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// the one provided in the SecureConfig.
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ErrChecksumsDoNotMatch = errors.New("checksums did not match")
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// ErrSecureNoChecksum is returned when an empty checksum is provided to the
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// SecureConfig.
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ErrSecureConfigNoChecksum = errors.New("no checksum provided")
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// ErrSecureNoHash is returned when a nil Hash object is provided to the
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// SecureConfig.
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ErrSecureConfigNoHash = errors.New("no hash implementation provided")
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// ErrSecureConfigAndReattach is returned when both Reattach and
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// SecureConfig are set.
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ErrSecureConfigAndReattach = errors.New("only one of Reattach or SecureConfig can be set")
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)
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// Client handles the lifecycle of a plugin application. It launches
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// plugins, connects to them, dispenses interface implementations, and handles
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// killing the process.
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//
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// Plugin hosts should use one Client for each plugin executable. To
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// dispense a plugin type, use the `Client.Client` function, and then
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// cal `Dispense`. This awkward API is mostly historical but is used to split
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// the client that deals with subprocess management and the client that
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// does RPC management.
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//
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// See NewClient and ClientConfig for using a Client.
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type Client struct {
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config *ClientConfig
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exited bool
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doneLogging chan struct{}
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l sync.Mutex
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address net.Addr
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process *os.Process
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client ClientProtocol
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protocol Protocol
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logger hclog.Logger
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doneCtx context.Context
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negotiatedVersion int
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}
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// NegotiatedVersion returns the protocol version negotiated with the server.
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// This is only valid after Start() is called.
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func (c *Client) NegotiatedVersion() int {
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return c.negotiatedVersion
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}
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// ClientConfig is the configuration used to initialize a new
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// plugin client. After being used to initialize a plugin client,
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// that configuration must not be modified again.
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type ClientConfig struct {
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// HandshakeConfig is the configuration that must match servers.
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HandshakeConfig
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// Plugins are the plugins that can be consumed.
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// The implied version of this PluginSet is the Handshake.ProtocolVersion.
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Plugins PluginSet
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// VersionedPlugins is a map of PluginSets for specific protocol versions.
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// These can be used to negotiate a compatible version between client and
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// server. If this is set, Handshake.ProtocolVersion is not required.
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VersionedPlugins map[int]PluginSet
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// One of the following must be set, but not both.
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//
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// Cmd is the unstarted subprocess for starting the plugin. If this is
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// set, then the Client starts the plugin process on its own and connects
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// to it.
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//
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// Reattach is configuration for reattaching to an existing plugin process
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// that is already running. This isn't common.
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Cmd *exec.Cmd
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Reattach *ReattachConfig
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// SecureConfig is configuration for verifying the integrity of the
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// executable. It can not be used with Reattach.
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SecureConfig *SecureConfig
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// TLSConfig is used to enable TLS on the RPC client.
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TLSConfig *tls.Config
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// Managed represents if the client should be managed by the
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// plugin package or not. If true, then by calling CleanupClients,
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// it will automatically be cleaned up. Otherwise, the client
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// user is fully responsible for making sure to Kill all plugin
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// clients. By default the client is _not_ managed.
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Managed bool
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// The minimum and maximum port to use for communicating with
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// the subprocess. If not set, this defaults to 10,000 and 25,000
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// respectively.
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MinPort, MaxPort uint
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// StartTimeout is the timeout to wait for the plugin to say it
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// has started successfully.
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StartTimeout time.Duration
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// If non-nil, then the stderr of the client will be written to here
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// (as well as the log). This is the original os.Stderr of the subprocess.
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// This isn't the output of synced stderr.
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Stderr io.Writer
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// SyncStdout, SyncStderr can be set to override the
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// respective os.Std* values in the plugin. Care should be taken to
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// avoid races here. If these are nil, then this will automatically be
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// hooked up to os.Stdin, Stdout, and Stderr, respectively.
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//
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// If the default values (nil) are used, then this package will not
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// sync any of these streams.
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SyncStdout io.Writer
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SyncStderr io.Writer
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// AllowedProtocols is a list of allowed protocols. If this isn't set,
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// then only netrpc is allowed. This is so that older go-plugin systems
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// can show friendly errors if they see a plugin with an unknown
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// protocol.
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//
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// By setting this, you can cause an error immediately on plugin start
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// if an unsupported protocol is used with a good error message.
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//
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// If this isn't set at all (nil value), then only net/rpc is accepted.
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// This is done for legacy reasons. You must explicitly opt-in to
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// new protocols.
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AllowedProtocols []Protocol
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// Logger is the logger that the client will used. If none is provided,
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// it will default to hclog's default logger.
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Logger hclog.Logger
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}
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// ReattachConfig is used to configure a client to reattach to an
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// already-running plugin process. You can retrieve this information by
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// calling ReattachConfig on Client.
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type ReattachConfig struct {
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Protocol Protocol
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Addr net.Addr
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Pid int
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}
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// SecureConfig is used to configure a client to verify the integrity of an
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// executable before running. It does this by verifying the checksum is
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// expected. Hash is used to specify the hashing method to use when checksumming
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// the file. The configuration is verified by the client by calling the
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// SecureConfig.Check() function.
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//
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// The host process should ensure the checksum was provided by a trusted and
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// authoritative source. The binary should be installed in such a way that it
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// can not be modified by an unauthorized user between the time of this check
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// and the time of execution.
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type SecureConfig struct {
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Checksum []byte
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Hash hash.Hash
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}
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// Check takes the filepath to an executable and returns true if the checksum of
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// the file matches the checksum provided in the SecureConfig.
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func (s *SecureConfig) Check(filePath string) (bool, error) {
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if len(s.Checksum) == 0 {
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return false, ErrSecureConfigNoChecksum
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}
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if s.Hash == nil {
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return false, ErrSecureConfigNoHash
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}
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file, err := os.Open(filePath)
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if err != nil {
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return false, err
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}
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defer file.Close()
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_, err = io.Copy(s.Hash, file)
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if err != nil {
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return false, err
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}
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sum := s.Hash.Sum(nil)
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return subtle.ConstantTimeCompare(sum, s.Checksum) == 1, nil
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}
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// This makes sure all the managed subprocesses are killed and properly
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// logged. This should be called before the parent process running the
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// plugins exits.
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//
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// This must only be called _once_.
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func CleanupClients() {
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// Set the killed to true so that we don't get unexpected panics
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atomic.StoreUint32(&Killed, 1)
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// Kill all the managed clients in parallel and use a WaitGroup
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// to wait for them all to finish up.
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var wg sync.WaitGroup
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managedClientsLock.Lock()
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for _, client := range managedClients {
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wg.Add(1)
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go func(client *Client) {
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client.Kill()
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wg.Done()
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}(client)
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}
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managedClientsLock.Unlock()
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wg.Wait()
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}
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// Creates a new plugin client which manages the lifecycle of an external
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// plugin and gets the address for the RPC connection.
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//
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// The client must be cleaned up at some point by calling Kill(). If
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// the client is a managed client (created with NewManagedClient) you
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// can just call CleanupClients at the end of your program and they will
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// be properly cleaned.
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func NewClient(config *ClientConfig) (c *Client) {
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if config.MinPort == 0 && config.MaxPort == 0 {
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config.MinPort = 10000
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config.MaxPort = 25000
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}
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if config.StartTimeout == 0 {
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config.StartTimeout = 1 * time.Minute
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}
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if config.Stderr == nil {
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config.Stderr = ioutil.Discard
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}
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if config.SyncStdout == nil {
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config.SyncStdout = ioutil.Discard
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}
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if config.SyncStderr == nil {
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config.SyncStderr = ioutil.Discard
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}
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if config.AllowedProtocols == nil {
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config.AllowedProtocols = []Protocol{ProtocolNetRPC}
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}
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if config.Logger == nil {
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config.Logger = hclog.New(&hclog.LoggerOptions{
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Output: hclog.DefaultOutput,
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Level: hclog.Trace,
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Name: "plugin",
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})
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}
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c = &Client{
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config: config,
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logger: config.Logger,
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}
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if config.Managed {
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managedClientsLock.Lock()
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managedClients = append(managedClients, c)
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managedClientsLock.Unlock()
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}
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return
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}
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// Client returns the protocol client for this connection.
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//
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// Subsequent calls to this will return the same client.
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func (c *Client) Client() (ClientProtocol, error) {
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_, err := c.Start()
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if err != nil {
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return nil, err
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}
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c.l.Lock()
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defer c.l.Unlock()
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if c.client != nil {
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return c.client, nil
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}
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switch c.protocol {
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case ProtocolNetRPC:
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c.client, err = newRPCClient(c)
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case ProtocolGRPC:
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c.client, err = newGRPCClient(c.doneCtx, c)
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default:
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return nil, fmt.Errorf("unknown server protocol: %s", c.protocol)
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}
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if err != nil {
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c.client = nil
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return nil, err
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}
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return c.client, nil
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}
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// Tells whether or not the underlying process has exited.
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func (c *Client) Exited() bool {
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c.l.Lock()
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defer c.l.Unlock()
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return c.exited
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}
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// End the executing subprocess (if it is running) and perform any cleanup
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// tasks necessary such as capturing any remaining logs and so on.
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//
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// This method blocks until the process successfully exits.
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//
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// This method can safely be called multiple times.
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func (c *Client) Kill() {
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// Grab a lock to read some private fields.
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c.l.Lock()
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process := c.process
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addr := c.address
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doneCh := c.doneLogging
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c.l.Unlock()
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// If there is no process, there is nothing to kill.
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if process == nil {
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return
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}
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defer func() {
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// Make sure there is no reference to the old process after it has been
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// killed.
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c.l.Lock()
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defer c.l.Unlock()
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c.process = nil
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}()
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// We need to check for address here. It is possible that the plugin
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// started (process != nil) but has no address (addr == nil) if the
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// plugin failed at startup. If we do have an address, we need to close
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// the plugin net connections.
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graceful := false
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if addr != nil {
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// Close the client to cleanly exit the process.
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client, err := c.Client()
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if err == nil {
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err = client.Close()
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// If there is no error, then we attempt to wait for a graceful
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// exit. If there was an error, we assume that graceful cleanup
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// won't happen and just force kill.
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graceful = err == nil
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if err != nil {
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// If there was an error just log it. We're going to force
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// kill in a moment anyways.
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c.logger.Warn("error closing client during Kill", "err", err)
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}
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}
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}
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// If we're attempting a graceful exit, then we wait for a short period
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// of time to allow that to happen. To wait for this we just wait on the
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// doneCh which would be closed if the process exits.
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if graceful {
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select {
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case <-doneCh:
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// FIXME: this is never reached under normal circumstances, because
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// the plugin process is never signaled to exit. We can reach this
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// if the child process exited abnormally before the Kill call.
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return
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case <-time.After(250 * time.Millisecond):
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c.logger.Warn("plugin failed to exit gracefully")
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}
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}
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// If graceful exiting failed, just kill it
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process.Kill()
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// Wait for the client to finish logging so we have a complete log
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<-doneCh
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}
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// Starts the underlying subprocess, communicating with it to negotiate
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// a port for RPC connections, and returning the address to connect via RPC.
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//
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// This method is safe to call multiple times. Subsequent calls have no effect.
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// Once a client has been started once, it cannot be started again, even if
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// it was killed.
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func (c *Client) Start() (addr net.Addr, err error) {
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c.l.Lock()
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defer c.l.Unlock()
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if c.address != nil {
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return c.address, nil
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}
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// If one of cmd or reattach isn't set, then it is an error. We wrap
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// this in a {} for scoping reasons, and hopeful that the escape
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// analysis will pop the stock here.
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{
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cmdSet := c.config.Cmd != nil
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attachSet := c.config.Reattach != nil
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secureSet := c.config.SecureConfig != nil
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if cmdSet == attachSet {
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return nil, fmt.Errorf("Only one of Cmd or Reattach must be set")
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}
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if secureSet && attachSet {
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return nil, ErrSecureConfigAndReattach
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}
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}
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// Create the logging channel for when we kill
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c.doneLogging = make(chan struct{})
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// Create a context for when we kill
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var ctxCancel context.CancelFunc
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c.doneCtx, ctxCancel = context.WithCancel(context.Background())
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if c.config.Reattach != nil {
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// Verify the process still exists. If not, then it is an error
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p, err := os.FindProcess(c.config.Reattach.Pid)
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if err != nil {
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return nil, err
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}
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// Attempt to connect to the addr since on Unix systems FindProcess
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// doesn't actually return an error if it can't find the process.
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conn, err := net.Dial(
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c.config.Reattach.Addr.Network(),
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c.config.Reattach.Addr.String())
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if err != nil {
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p.Kill()
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return nil, ErrProcessNotFound
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}
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conn.Close()
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// Goroutine to mark exit status
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go func(pid int) {
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// ensure the context is cancelled when we're done
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defer ctxCancel()
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// Wait for the process to die
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pidWait(pid)
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// Log so we can see it
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c.logger.Debug("reattached plugin process exited")
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// Mark it
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c.l.Lock()
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defer c.l.Unlock()
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c.exited = true
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// Close the logging channel since that doesn't work on reattach
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close(c.doneLogging)
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}(p.Pid)
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// Set the address and process
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c.address = c.config.Reattach.Addr
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c.process = p
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c.protocol = c.config.Reattach.Protocol
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if c.protocol == "" {
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// Default the protocol to net/rpc for backwards compatibility
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c.protocol = ProtocolNetRPC
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}
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return c.address, nil
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}
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if c.config.VersionedPlugins == nil {
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c.config.VersionedPlugins = make(map[int]PluginSet)
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}
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// handle all plugins as versioned, using the handshake config as the default.
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version := int(c.config.ProtocolVersion)
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// Make sure we're not overwriting a real version 0. If ProtocolVersion was
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// non-zero, then we have to just assume the user made sure that
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// VersionedPlugins doesn't conflict.
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if _, ok := c.config.VersionedPlugins[version]; !ok && c.config.Plugins != nil {
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c.config.VersionedPlugins[version] = c.config.Plugins
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}
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var versionStrings []string
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for v := range c.config.VersionedPlugins {
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versionStrings = append(versionStrings, strconv.Itoa(v))
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}
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env := []string{
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fmt.Sprintf("%s=%s", c.config.MagicCookieKey, c.config.MagicCookieValue),
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fmt.Sprintf("PLUGIN_MIN_PORT=%d", c.config.MinPort),
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fmt.Sprintf("PLUGIN_MAX_PORT=%d", c.config.MaxPort),
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fmt.Sprintf("PLUGIN_PROTOCOL_VERSIONS=%s", strings.Join(versionStrings, ",")),
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}
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stdout_r, stdout_w := io.Pipe()
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stderr_r, stderr_w := io.Pipe()
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cmd := c.config.Cmd
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cmd.Env = append(cmd.Env, os.Environ()...)
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cmd.Env = append(cmd.Env, env...)
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cmd.Stdin = os.Stdin
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cmd.Stderr = stderr_w
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cmd.Stdout = stdout_w
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if c.config.SecureConfig != nil {
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if ok, err := c.config.SecureConfig.Check(cmd.Path); err != nil {
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return nil, fmt.Errorf("error verifying checksum: %s", err)
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} else if !ok {
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return nil, ErrChecksumsDoNotMatch
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}
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}
|
|
|
|
c.logger.Debug("starting plugin", "path", cmd.Path, "args", cmd.Args)
|
|
err = cmd.Start()
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
// Set the process
|
|
c.process = cmd.Process
|
|
c.logger.Debug("plugin started", "path", cmd.Path, "pid", c.process.Pid)
|
|
|
|
// Make sure the command is properly cleaned up if there is an error
|
|
defer func() {
|
|
r := recover()
|
|
|
|
if err != nil || r != nil {
|
|
cmd.Process.Kill()
|
|
}
|
|
|
|
if r != nil {
|
|
panic(r)
|
|
}
|
|
}()
|
|
|
|
// Start goroutine to wait for process to exit
|
|
exitCh := make(chan struct{})
|
|
go func() {
|
|
// Make sure we close the write end of our stderr/stdout so
|
|
// that the readers send EOF properly.
|
|
defer stderr_w.Close()
|
|
defer stdout_w.Close()
|
|
|
|
// ensure the context is cancelled when we're done
|
|
defer ctxCancel()
|
|
|
|
// Wait for the command to end.
|
|
err := cmd.Wait()
|
|
|
|
debugMsgArgs := []interface{}{
|
|
"path", cmd.Path,
|
|
"pid", c.process.Pid,
|
|
}
|
|
if err != nil {
|
|
debugMsgArgs = append(debugMsgArgs,
|
|
[]interface{}{"error", err.Error()}...)
|
|
}
|
|
|
|
// Log and make sure to flush the logs write away
|
|
c.logger.Debug("plugin process exited", debugMsgArgs...)
|
|
os.Stderr.Sync()
|
|
|
|
// Mark that we exited
|
|
close(exitCh)
|
|
|
|
// Set that we exited, which takes a lock
|
|
c.l.Lock()
|
|
defer c.l.Unlock()
|
|
c.exited = true
|
|
}()
|
|
|
|
// Start goroutine that logs the stderr
|
|
go c.logStderr(stderr_r)
|
|
|
|
// Start a goroutine that is going to be reading the lines
|
|
// out of stdout
|
|
linesCh := make(chan []byte)
|
|
go func() {
|
|
defer close(linesCh)
|
|
|
|
buf := bufio.NewReader(stdout_r)
|
|
for {
|
|
line, err := buf.ReadBytes('\n')
|
|
if line != nil {
|
|
linesCh <- line
|
|
}
|
|
|
|
if err == io.EOF {
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
|
|
// Make sure after we exit we read the lines from stdout forever
|
|
// so they don't block since it is an io.Pipe
|
|
defer func() {
|
|
go func() {
|
|
for _ = range linesCh {
|
|
}
|
|
}()
|
|
}()
|
|
|
|
// Some channels for the next step
|
|
timeout := time.After(c.config.StartTimeout)
|
|
|
|
// Start looking for the address
|
|
c.logger.Debug("waiting for RPC address", "path", cmd.Path)
|
|
select {
|
|
case <-timeout:
|
|
err = errors.New("timeout while waiting for plugin to start")
|
|
case <-exitCh:
|
|
err = errors.New("plugin exited before we could connect")
|
|
case lineBytes := <-linesCh:
|
|
// Trim the line and split by "|" in order to get the parts of
|
|
// the output.
|
|
line := strings.TrimSpace(string(lineBytes))
|
|
parts := strings.SplitN(line, "|", 6)
|
|
if len(parts) < 4 {
|
|
err = fmt.Errorf(
|
|
"Unrecognized remote plugin message: %s\n\n"+
|
|
"This usually means that the plugin is either invalid or simply\n"+
|
|
"needs to be recompiled to support the latest protocol.", line)
|
|
return
|
|
}
|
|
|
|
// Check the core protocol. Wrapped in a {} for scoping.
|
|
{
|
|
var coreProtocol int64
|
|
coreProtocol, err = strconv.ParseInt(parts[0], 10, 0)
|
|
if err != nil {
|
|
err = fmt.Errorf("Error parsing core protocol version: %s", err)
|
|
return
|
|
}
|
|
|
|
if int(coreProtocol) != CoreProtocolVersion {
|
|
err = fmt.Errorf("Incompatible core API version with plugin. "+
|
|
"Plugin version: %s, Core version: %d\n\n"+
|
|
"To fix this, the plugin usually only needs to be recompiled.\n"+
|
|
"Please report this to the plugin author.", parts[0], CoreProtocolVersion)
|
|
return
|
|
}
|
|
}
|
|
|
|
// Test the API version
|
|
version, pluginSet, err := c.checkProtoVersion(parts[1])
|
|
if err != nil {
|
|
return addr, err
|
|
}
|
|
|
|
// set the Plugins value to the compatible set, so the version
|
|
// doesn't need to be passed through to the ClientProtocol
|
|
// implementation.
|
|
c.config.Plugins = pluginSet
|
|
c.negotiatedVersion = version
|
|
c.logger.Debug("using plugin", "version", version)
|
|
|
|
switch parts[2] {
|
|
case "tcp":
|
|
addr, err = net.ResolveTCPAddr("tcp", parts[3])
|
|
case "unix":
|
|
addr, err = net.ResolveUnixAddr("unix", parts[3])
|
|
default:
|
|
err = fmt.Errorf("Unknown address type: %s", parts[3])
|
|
}
|
|
|
|
// If we have a server type, then record that. We default to net/rpc
|
|
// for backwards compatibility.
|
|
c.protocol = ProtocolNetRPC
|
|
if len(parts) >= 5 {
|
|
c.protocol = Protocol(parts[4])
|
|
}
|
|
|
|
found := false
|
|
for _, p := range c.config.AllowedProtocols {
|
|
if p == c.protocol {
|
|
found = true
|
|
break
|
|
}
|
|
}
|
|
if !found {
|
|
err = fmt.Errorf("Unsupported plugin protocol %q. Supported: %v",
|
|
c.protocol, c.config.AllowedProtocols)
|
|
return addr, err
|
|
}
|
|
|
|
}
|
|
|
|
c.address = addr
|
|
return
|
|
}
|
|
|
|
// checkProtoVersion returns the negotiated version and PluginSet.
|
|
// This returns an error if the server returned an incompatible protocol
|
|
// version, or an invalid handshake response.
|
|
func (c *Client) checkProtoVersion(protoVersion string) (int, PluginSet, error) {
|
|
serverVersion, err := strconv.Atoi(protoVersion)
|
|
if err != nil {
|
|
return 0, nil, fmt.Errorf("Error parsing protocol version %q: %s", protoVersion, err)
|
|
}
|
|
|
|
// record these for the error message
|
|
var clientVersions []int
|
|
|
|
// all versions, including the legacy ProtocolVersion have been added to
|
|
// the versions set
|
|
for version, plugins := range c.config.VersionedPlugins {
|
|
clientVersions = append(clientVersions, version)
|
|
|
|
if serverVersion != version {
|
|
continue
|
|
}
|
|
return version, plugins, nil
|
|
}
|
|
|
|
return 0, nil, fmt.Errorf("Incompatible API version with plugin. "+
|
|
"Plugin version: %d, Client versions: %d", serverVersion, clientVersions)
|
|
}
|
|
|
|
// ReattachConfig returns the information that must be provided to NewClient
|
|
// to reattach to the plugin process that this client started. This is
|
|
// useful for plugins that detach from their parent process.
|
|
//
|
|
// If this returns nil then the process hasn't been started yet. Please
|
|
// call Start or Client before calling this.
|
|
func (c *Client) ReattachConfig() *ReattachConfig {
|
|
c.l.Lock()
|
|
defer c.l.Unlock()
|
|
|
|
if c.address == nil {
|
|
return nil
|
|
}
|
|
|
|
if c.config.Cmd != nil && c.config.Cmd.Process == nil {
|
|
return nil
|
|
}
|
|
|
|
// If we connected via reattach, just return the information as-is
|
|
if c.config.Reattach != nil {
|
|
return c.config.Reattach
|
|
}
|
|
|
|
return &ReattachConfig{
|
|
Protocol: c.protocol,
|
|
Addr: c.address,
|
|
Pid: c.config.Cmd.Process.Pid,
|
|
}
|
|
}
|
|
|
|
// Protocol returns the protocol of server on the remote end. This will
|
|
// start the plugin process if it isn't already started. Errors from
|
|
// starting the plugin are surpressed and ProtocolInvalid is returned. It
|
|
// is recommended you call Start explicitly before calling Protocol to ensure
|
|
// no errors occur.
|
|
func (c *Client) Protocol() Protocol {
|
|
_, err := c.Start()
|
|
if err != nil {
|
|
return ProtocolInvalid
|
|
}
|
|
|
|
return c.protocol
|
|
}
|
|
|
|
func netAddrDialer(addr net.Addr) func(string, time.Duration) (net.Conn, error) {
|
|
return func(_ string, _ time.Duration) (net.Conn, error) {
|
|
// Connect to the client
|
|
conn, err := net.Dial(addr.Network(), addr.String())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if tcpConn, ok := conn.(*net.TCPConn); ok {
|
|
// Make sure to set keep alive so that the connection doesn't die
|
|
tcpConn.SetKeepAlive(true)
|
|
}
|
|
|
|
return conn, nil
|
|
}
|
|
}
|
|
|
|
// dialer is compatible with grpc.WithDialer and creates the connection
|
|
// to the plugin.
|
|
func (c *Client) dialer(_ string, timeout time.Duration) (net.Conn, error) {
|
|
conn, err := netAddrDialer(c.address)("", timeout)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// If we have a TLS config we wrap our connection. We only do this
|
|
// for net/rpc since gRPC uses its own mechanism for TLS.
|
|
if c.protocol == ProtocolNetRPC && c.config.TLSConfig != nil {
|
|
conn = tls.Client(conn, c.config.TLSConfig)
|
|
}
|
|
|
|
return conn, nil
|
|
}
|
|
|
|
func (c *Client) logStderr(r io.Reader) {
|
|
bufR := bufio.NewReader(r)
|
|
l := c.logger.Named(filepath.Base(c.config.Cmd.Path))
|
|
|
|
for {
|
|
line, err := bufR.ReadString('\n')
|
|
if line != "" {
|
|
c.config.Stderr.Write([]byte(line))
|
|
line = strings.TrimRightFunc(line, unicode.IsSpace)
|
|
|
|
entry, err := parseJSON(line)
|
|
// If output is not JSON format, print directly to Debug
|
|
if err != nil {
|
|
l.Debug(line)
|
|
} else {
|
|
out := flattenKVPairs(entry.KVPairs)
|
|
|
|
out = append(out, "timestamp", entry.Timestamp.Format(hclog.TimeFormat))
|
|
switch hclog.LevelFromString(entry.Level) {
|
|
case hclog.Trace:
|
|
l.Trace(entry.Message, out...)
|
|
case hclog.Debug:
|
|
l.Debug(entry.Message, out...)
|
|
case hclog.Info:
|
|
l.Info(entry.Message, out...)
|
|
case hclog.Warn:
|
|
l.Warn(entry.Message, out...)
|
|
case hclog.Error:
|
|
l.Error(entry.Message, out...)
|
|
}
|
|
}
|
|
}
|
|
|
|
if err == io.EOF {
|
|
break
|
|
}
|
|
}
|
|
|
|
// Flag that we've completed logging for others
|
|
close(c.doneLogging)
|
|
}
|