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-rw-r--r--cmd/podman/shared/create.go2
-rw-r--r--docs/podman-logs.1.md2
-rw-r--r--libpod/container_log.go25
-rw-r--r--libpod/container_log_linux.go114
-rw-r--r--libpod/container_log_unsupported.go7
-rw-r--r--libpod/oci.go6
-rw-r--r--libpod/oci_linux.go2
-rw-r--r--test/e2e/logs_test.go78
8 files changed, 230 insertions, 6 deletions
diff --git a/cmd/podman/shared/create.go b/cmd/podman/shared/create.go
index 4e105cad4..7cf230605 100644
--- a/cmd/podman/shared/create.go
+++ b/cmd/podman/shared/create.go
@@ -603,7 +603,7 @@ func ParseCreateOpts(ctx context.Context, c *GenericCLIResults, runtime *libpod.
memorySwappiness := c.Int64("memory-swappiness")
- logDriver := "k8s-file"
+ logDriver := libpod.KubernetesLogging
if c.Changed("log-driver") {
logDriver = c.String("log-driver")
}
diff --git a/docs/podman-logs.1.md b/docs/podman-logs.1.md
index ce5d890ce..6d5be373b 100644
--- a/docs/podman-logs.1.md
+++ b/docs/podman-logs.1.md
@@ -23,6 +23,8 @@ Note: If you are following a container which is removed `podman container rm`
or removed on exit `podman run --rm ...`, then there is a chance the the log
file will be removed before `podman logs` reads the final content.
+Also note: **--follow** is not currently supported when the container's log driver is journald
+
**--latest, -l**
Instead of providing the container name or ID, use the last created container. If you use methods other than Podman
diff --git a/libpod/container_log.go b/libpod/container_log.go
index f11db8014..9276b52f4 100644
--- a/libpod/container_log.go
+++ b/libpod/container_log.go
@@ -19,6 +19,16 @@ const (
// zeroes are not trimmed, taken from
// https://github.com/golang/go/issues/19635
logTimeFormat = "2006-01-02T15:04:05.000000000Z07:00"
+
+ // readLogTimeFormat is the format the log lines will be read in
+ readLogTimeFormat = time.RFC3339Nano
+
+ // partialLogType signifies a log line that exceeded the buffer
+ // length and needed to spill into a new line
+ partialLogType = "P"
+
+ // fullLogType signifies a log line is full
+ fullLogType = "F"
)
// LogOptions is the options you can use for logs
@@ -55,9 +65,16 @@ func (r *Runtime) Log(containers []*Container, options *LogOptions, logChannel c
func (c *Container) ReadLog(options *LogOptions, logChannel chan *LogLine) error {
// TODO Skip sending logs until journald logs can be read
// TODO make this not a magic string
- if c.LogDriver() == "journald" {
- return ErrNotImplemented
+ if c.LogDriver() == JournaldLogging {
+ if options.Follow {
+ return errors.Errorf("The follow option with journald logging is not currently supported")
+ }
+ return c.readFromJournal(options, logChannel)
}
+ return c.readFromLogFile(options, logChannel)
+}
+
+func (c *Container) readFromLogFile(options *LogOptions, logChannel chan *LogLine) error {
t, tailLog, err := getLogFile(c.LogPath(), options)
if err != nil {
// If the log file does not exist, this is not fatal.
@@ -196,7 +213,7 @@ func newLogLine(line string) (*LogLine, error) {
if len(splitLine) < 4 {
return nil, errors.Errorf("'%s' is not a valid container log line", line)
}
- logTime, err := time.Parse(time.RFC3339Nano, splitLine[0])
+ logTime, err := time.Parse(readLogTimeFormat, splitLine[0])
if err != nil {
return nil, errors.Wrapf(err, "unable to convert time %s from container log", splitLine[0])
}
@@ -211,7 +228,7 @@ func newLogLine(line string) (*LogLine, error) {
// Partial returns a bool if the log line is a partial log type
func (l *LogLine) Partial() bool {
- if l.ParseLogType == "P" {
+ if l.ParseLogType == partialLogType {
return true
}
return false
diff --git a/libpod/container_log_linux.go b/libpod/container_log_linux.go
new file mode 100644
index 000000000..47dc44b8f
--- /dev/null
+++ b/libpod/container_log_linux.go
@@ -0,0 +1,114 @@
+//+build linux
+
+package libpod
+
+import (
+ "fmt"
+ "io"
+ "strings"
+ "time"
+
+ journal "github.com/coreos/go-systemd/sdjournal"
+ "github.com/pkg/errors"
+ "github.com/sirupsen/logrus"
+)
+
+const (
+ // journaldLogOut is the journald priority signifying stdout
+ journaldLogOut = "6"
+
+ // journaldLogErr is the journald priority signifying stderr
+ journaldLogErr = "3"
+
+ // bufLen is the length of the buffer to read from a k8s-file
+ // formatted log line
+ // It consists of conmon.TSBUFLEN+2+conmon.STDIOBUFSIZE+'\0'
+ bufLen = 44 + 2 + 8192 + 1
+)
+
+func (c *Container) readFromJournal(options *LogOptions, logChannel chan *LogLine) error {
+ var config journal.JournalReaderConfig
+ config.NumFromTail = options.Tail
+ config.Formatter = journalFormatter
+ defaultTime := time.Time{}
+ if options.Since != defaultTime {
+ // coreos/go-systemd/sdjournal doesn't correctly handle requests for data in the future
+ // return nothing instead of fasely printing
+ if time.Now().Before(options.Since) {
+ return nil
+ }
+ config.Since = time.Since(options.Since)
+ }
+ config.Matches = append(config.Matches, journal.Match{
+ Field: "CONTAINER_ID_FULL",
+ Value: c.ID(),
+ })
+ options.WaitGroup.Add(1)
+
+ r, err := journal.NewJournalReader(config)
+ if err != nil {
+ return err
+ }
+ if r == nil {
+ return errors.Errorf("journal reader creation failed")
+ }
+ if options.Tail == 0 {
+ r.Rewind()
+ }
+
+ go func() {
+ bytes := make([]byte, bufLen)
+ // /me complains about no do-while in go
+ ec, err := r.Read(bytes)
+ for ec != 0 && err == nil {
+ // because we are reusing bytes, we need to make
+ // sure the old data doesn't get into the new line
+ bytestr := string(bytes[:ec])
+ logLine, err2 := newLogLine(bytestr)
+ if err2 != nil {
+ logrus.Error(err2)
+ continue
+ }
+ logChannel <- logLine
+ ec, err = r.Read(bytes)
+ }
+ if err != nil && err != io.EOF {
+ logrus.Error(err)
+ }
+ r.Close()
+ options.WaitGroup.Done()
+ }()
+ return nil
+}
+
+func journalFormatter(entry *journal.JournalEntry) (string, error) {
+ usec := entry.RealtimeTimestamp
+ timestamp := time.Unix(0, int64(usec)*int64(time.Microsecond))
+ output := timestamp.Format(readLogTimeFormat) + " "
+ priority, ok := entry.Fields["PRIORITY"]
+ if !ok {
+ return "", errors.Errorf("no PRIORITY field present in journal entry")
+ }
+ if priority == journaldLogOut {
+ output += "stdout "
+ } else if priority == journaldLogErr {
+ output += "stderr "
+ } else {
+ return "", errors.Errorf("unexpected PRIORITY field in journal entry")
+ }
+
+ // if CONTAINER_PARTIAL_MESSAGE is defined, the log type is "P"
+ if _, ok := entry.Fields["CONTAINER_PARTIAL_MESSAGE"]; ok {
+ output += fmt.Sprintf("%s ", partialLogType)
+ } else {
+ output += fmt.Sprintf("%s ", fullLogType)
+ }
+
+ // Finally, append the message
+ msg, ok := entry.Fields["MESSAGE"]
+ if !ok {
+ return "", fmt.Errorf("no MESSAGE field present in journal entry")
+ }
+ output += strings.TrimSpace(msg)
+ return output, nil
+}
diff --git a/libpod/container_log_unsupported.go b/libpod/container_log_unsupported.go
new file mode 100644
index 000000000..0c3d41620
--- /dev/null
+++ b/libpod/container_log_unsupported.go
@@ -0,0 +1,7 @@
+//+build !linux
+
+package libpod
+
+func (c *Container) readFromJournal(options *LogOptions, logChannel chan *LogLine) error {
+ return ErrOSNotSupported
+}
diff --git a/libpod/oci.go b/libpod/oci.go
index 152c8e73e..a3e44bcce 100644
--- a/libpod/oci.go
+++ b/libpod/oci.go
@@ -42,6 +42,12 @@ const (
// NsRunDir is the default directory in which running network namespaces
// are stored
NsRunDir = "/var/run/netns"
+
+ // JournaldLogging is the string conmon expects to specify journald logging
+ JournaldLogging = "journald"
+
+ // KubernetesLogging is the string conmon expects when specifying to use the kubernetes logging format
+ KubernetesLogging = "k8s-file"
)
// OCIRuntime represents an OCI-compatible runtime that libpod can call into
diff --git a/libpod/oci_linux.go b/libpod/oci_linux.go
index b3a21948e..5d66e6d82 100644
--- a/libpod/oci_linux.go
+++ b/libpod/oci_linux.go
@@ -237,7 +237,7 @@ func (r *OCIRuntime) createOCIContainer(ctr *Container, cgroupParent string, res
args = append(args, "--log-size-max", fmt.Sprintf("%v", r.logSizeMax))
}
- logDriver := "k8s-file"
+ logDriver := KubernetesLogging
if ctr.LogDriver() != "" {
logDriver = ctr.LogDriver()
}
diff --git a/test/e2e/logs_test.go b/test/e2e/logs_test.go
index 2c82182cf..20d02efcb 100644
--- a/test/e2e/logs_test.go
+++ b/test/e2e/logs_test.go
@@ -140,4 +140,82 @@ var _ = Describe("Podman logs", func() {
results.WaitWithDefaultTimeout()
Expect(results.ExitCode()).To(BeZero())
})
+
+ It("podman journald logs for container", func() {
+ Skip("need to verify images have correct packages for journald")
+ logc := podmanTest.Podman([]string{"run", "--log-driver", "journald", "-dt", ALPINE, "sh", "-c", "echo podman; echo podman; echo podman"})
+ logc.WaitWithDefaultTimeout()
+ Expect(logc.ExitCode()).To(Equal(0))
+ cid := logc.OutputToString()
+
+ results := podmanTest.Podman([]string{"logs", cid})
+ results.WaitWithDefaultTimeout()
+ Expect(results.ExitCode()).To(Equal(0))
+ Expect(len(results.OutputToStringArray())).To(Equal(3))
+ })
+
+ It("podman journald logs tail two lines", func() {
+ Skip("need to verify images have correct packages for journald")
+ logc := podmanTest.Podman([]string{"run", "--log-driver", "journald", "-dt", ALPINE, "sh", "-c", "echo podman; echo podman; echo podman"})
+ logc.WaitWithDefaultTimeout()
+ Expect(logc.ExitCode()).To(Equal(0))
+ cid := logc.OutputToString()
+
+ results := podmanTest.Podman([]string{"logs", "--tail", "2", cid})
+ results.WaitWithDefaultTimeout()
+ Expect(results.ExitCode()).To(Equal(0))
+ Expect(len(results.OutputToStringArray())).To(Equal(2))
+ })
+
+ It("podman journald logs tail 99 lines", func() {
+ Skip("need to verify images have correct packages for journald")
+ logc := podmanTest.Podman([]string{"run", "--log-driver", "journald", "-dt", ALPINE, "sh", "-c", "echo podman; echo podman; echo podman"})
+ logc.WaitWithDefaultTimeout()
+ Expect(logc.ExitCode()).To(Equal(0))
+ cid := logc.OutputToString()
+
+ results := podmanTest.Podman([]string{"logs", "--tail", "99", cid})
+ results.WaitWithDefaultTimeout()
+ Expect(results.ExitCode()).To(Equal(0))
+ Expect(len(results.OutputToStringArray())).To(Equal(3))
+ })
+
+ It("podman journald logs tail 2 lines with timestamps", func() {
+ Skip("need to verify images have correct packages for journald")
+ logc := podmanTest.Podman([]string{"run", "--log-driver", "journald", "-dt", ALPINE, "sh", "-c", "echo podman; echo podman; echo podman"})
+ logc.WaitWithDefaultTimeout()
+ Expect(logc.ExitCode()).To(Equal(0))
+ cid := logc.OutputToString()
+
+ results := podmanTest.Podman([]string{"logs", "--tail", "2", "-t", cid})
+ results.WaitWithDefaultTimeout()
+ Expect(results.ExitCode()).To(Equal(0))
+ Expect(len(results.OutputToStringArray())).To(Equal(2))
+ })
+
+ It("podman journald logs latest with since time", func() {
+ Skip("need to verify images have correct packages for journald")
+ logc := podmanTest.Podman([]string{"run", "--log-driver", "journald", "-dt", ALPINE, "sh", "-c", "echo podman; echo podman; echo podman"})
+ logc.WaitWithDefaultTimeout()
+ Expect(logc.ExitCode()).To(Equal(0))
+ cid := logc.OutputToString()
+
+ results := podmanTest.Podman([]string{"logs", "--since", "2017-08-07T10:10:09.056611202-04:00", cid})
+ results.WaitWithDefaultTimeout()
+ Expect(results.ExitCode()).To(Equal(0))
+ Expect(len(results.OutputToStringArray())).To(Equal(3))
+ })
+
+ It("podman journald logs latest with since duration", func() {
+ Skip("need to verify images have correct packages for journald")
+ logc := podmanTest.Podman([]string{"run", "--log-driver", "journald", "-dt", ALPINE, "sh", "-c", "echo podman; echo podman; echo podman"})
+ logc.WaitWithDefaultTimeout()
+ Expect(logc.ExitCode()).To(Equal(0))
+ cid := logc.OutputToString()
+
+ results := podmanTest.Podman([]string{"logs", "--since", "10m", cid})
+ results.WaitWithDefaultTimeout()
+ Expect(results.ExitCode()).To(Equal(0))
+ Expect(len(results.OutputToStringArray())).To(Equal(3))
+ })
})
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-12-26 17:29:56 +0000