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moby--moby/integration-cli/docker_cli_health_test.go
Josh Horwitz 1a149a0ea5 Adds container health support to docker ps filter
Signed-off-by: Josh Horwitz <horwitzja@gmail.com>
2016-10-28 15:43:04 -04:00

169 lines
5.1 KiB
Go

package main
import (
"encoding/json"
"strconv"
"strings"
"time"
"github.com/docker/docker/api/types"
"github.com/docker/docker/pkg/integration/checker"
"github.com/go-check/check"
)
func waitForStatus(c *check.C, name string, prev string, expected string) {
prev = prev + "\n"
expected = expected + "\n"
for {
out, _ := dockerCmd(c, "inspect", "--format={{.State.Status}}", name)
if out == expected {
return
}
c.Check(out, checker.Equals, prev)
if out != prev {
return
}
time.Sleep(100 * time.Millisecond)
}
}
func waitForHealthStatus(c *check.C, name string, prev string, expected string) {
prev = prev + "\n"
expected = expected + "\n"
for {
out, _ := dockerCmd(c, "inspect", "--format={{.State.Health.Status}}", name)
if out == expected {
return
}
c.Check(out, checker.Equals, prev)
if out != prev {
return
}
time.Sleep(100 * time.Millisecond)
}
}
func getHealth(c *check.C, name string) *types.Health {
out, _ := dockerCmd(c, "inspect", "--format={{json .State.Health}}", name)
var health types.Health
err := json.Unmarshal([]byte(out), &health)
c.Check(err, checker.Equals, nil)
return &health
}
func (s *DockerSuite) TestHealth(c *check.C) {
testRequires(c, DaemonIsLinux) // busybox doesn't work on Windows
imageName := "testhealth"
_, err := buildImage(imageName,
`FROM busybox
RUN echo OK > /status
CMD ["/bin/sleep", "120"]
STOPSIGNAL SIGKILL
HEALTHCHECK --interval=1s --timeout=30s \
CMD cat /status`,
true)
c.Check(err, check.IsNil)
// No health status before starting
name := "test_health"
dockerCmd(c, "create", "--name", name, imageName)
out, _ := dockerCmd(c, "ps", "-a", "--format={{.Status}}")
c.Check(out, checker.Equals, "Created\n")
// Inspect the options
out, _ = dockerCmd(c, "inspect",
"--format=timeout={{.Config.Healthcheck.Timeout}} "+
"interval={{.Config.Healthcheck.Interval}} "+
"retries={{.Config.Healthcheck.Retries}} "+
"test={{.Config.Healthcheck.Test}}", name)
c.Check(out, checker.Equals, "timeout=30s interval=1s retries=0 test=[CMD-SHELL cat /status]\n")
// Start
dockerCmd(c, "start", name)
waitForHealthStatus(c, name, "starting", "healthy")
// Make it fail
dockerCmd(c, "exec", name, "rm", "/status")
waitForHealthStatus(c, name, "healthy", "unhealthy")
// Inspect the status
out, _ = dockerCmd(c, "inspect", "--format={{.State.Health.Status}}", name)
c.Check(out, checker.Equals, "unhealthy\n")
// Make it healthy again
dockerCmd(c, "exec", name, "touch", "/status")
waitForHealthStatus(c, name, "unhealthy", "healthy")
// Remove container
dockerCmd(c, "rm", "-f", name)
// Disable the check from the CLI
out, _ = dockerCmd(c, "create", "--name=noh", "--no-healthcheck", imageName)
out, _ = dockerCmd(c, "inspect", "--format={{.Config.Healthcheck.Test}}", "noh")
c.Check(out, checker.Equals, "[NONE]\n")
dockerCmd(c, "rm", "noh")
// Disable the check with a new build
_, err = buildImage("no_healthcheck",
`FROM testhealth
HEALTHCHECK NONE`, true)
c.Check(err, check.IsNil)
out, _ = dockerCmd(c, "inspect", "--format={{.ContainerConfig.Healthcheck.Test}}", "no_healthcheck")
c.Check(out, checker.Equals, "[NONE]\n")
// Enable the checks from the CLI
_, _ = dockerCmd(c, "run", "-d", "--name=fatal_healthcheck",
"--health-interval=0.5s",
"--health-retries=3",
"--health-cmd=cat /status",
"no_healthcheck")
waitForHealthStatus(c, "fatal_healthcheck", "starting", "healthy")
health := getHealth(c, "fatal_healthcheck")
c.Check(health.Status, checker.Equals, "healthy")
c.Check(health.FailingStreak, checker.Equals, 0)
last := health.Log[len(health.Log)-1]
c.Check(last.ExitCode, checker.Equals, 0)
c.Check(last.Output, checker.Equals, "OK\n")
// Fail the check
dockerCmd(c, "exec", "fatal_healthcheck", "rm", "/status")
waitForHealthStatus(c, "fatal_healthcheck", "healthy", "unhealthy")
failsStr, _ := dockerCmd(c, "inspect", "--format={{.State.Health.FailingStreak}}", "fatal_healthcheck")
fails, err := strconv.Atoi(strings.TrimSpace(failsStr))
c.Check(err, check.IsNil)
c.Check(fails >= 3, checker.Equals, true)
dockerCmd(c, "rm", "-f", "fatal_healthcheck")
// Check timeout
// Note: if the interval is too small, it seems that Docker spends all its time running health
// checks and never gets around to killing it.
_, _ = dockerCmd(c, "run", "-d", "--name=test",
"--health-interval=1s", "--health-cmd=sleep 5m", "--health-timeout=1ms", imageName)
waitForHealthStatus(c, "test", "starting", "unhealthy")
health = getHealth(c, "test")
last = health.Log[len(health.Log)-1]
c.Check(health.Status, checker.Equals, "unhealthy")
c.Check(last.ExitCode, checker.Equals, -1)
c.Check(last.Output, checker.Equals, "Health check exceeded timeout (1ms)")
dockerCmd(c, "rm", "-f", "test")
// Check JSON-format
_, err = buildImage(imageName,
`FROM busybox
RUN echo OK > /status
CMD ["/bin/sleep", "120"]
STOPSIGNAL SIGKILL
HEALTHCHECK --interval=1s --timeout=30s \
CMD ["cat", "/my status"]`,
true)
c.Check(err, check.IsNil)
out, _ = dockerCmd(c, "inspect",
"--format={{.Config.Healthcheck.Test}}", imageName)
c.Check(out, checker.Equals, "[CMD cat /my status]\n")
}