Implement Runnable for docker containers

master
blallo 2023-03-14 18:38:56 +01:00
parent 0a071a2285
commit 771ed838c6
Signed by: blallo
GPG Key ID: C530464EEDCF489A
4 changed files with 290 additions and 1 deletions

View File

@ -26,6 +26,7 @@ var (
tlsKey = flag.String("tls-key", "", "Path to key file for TLS connection")
systemd = flag.Bool("systemd", false, "Interpret as systemd unit")
user = flag.Bool("systemd-as-user", false, "Connect to systemd via DBus as current user")
docker = flag.Bool("docker", false, "Interpret as a docker container")
)
func main() {
@ -44,6 +45,14 @@ func main() {
logger.SetLevel(logz.LogDebug)
}
if *docker && *systemd {
logger.Err(map[string]any{
"msg": "Incompatible flags",
"err": "You may set `-docker` or `-systemd`",
})
os.Exit(1)
}
runnableName := flag.Arg(0)
var runnable broadcast.Runnable
@ -51,6 +60,8 @@ func main() {
if *systemd {
runnable = broadcast.NewSystemdUnit(logger, runnableName, *user)
} else if *docker {
runnable = broadcast.NewDockerContainer(logger, runnableName)
} else {
cmdLine := flag.Args()[1:]
runnable, err = broadcast.NewProcess(logger, runnableName, cmdLine...)
@ -189,7 +200,7 @@ func main() {
}
func withTimeout[T any](ctx context.Context, respCh <-chan T) (zero T, err error) {
shortCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
shortCtx, cancel := context.WithTimeout(ctx, 15*time.Second)
defer cancel()
select {

208
docker.go 100644
View File

@ -0,0 +1,208 @@
package broadcast
import (
"bufio"
"context"
"errors"
"io"
"strconv"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/client"
"github.com/docker/docker/pkg/stdcopy"
"git.sr.ht/~blallo/logz/interface"
)
var (
ErrNotFound = errors.New("container not found")
ErrTooMany = errors.New("too many containers match the name")
)
var _ Runnable = &DockerContainer{}
type DockerContainer struct {
name string
client *client.Client
logger logz.Logger
}
func NewDockerContainer(logger logz.Logger, name string) *DockerContainer {
return &DockerContainer{
name: name,
logger: logger,
}
}
func (d *DockerContainer) Init(ctx context.Context) error {
cli, err := client.NewClientWithOpts(client.FromEnv)
if err != nil {
return err
}
d.client = cli
return nil
}
func (d *DockerContainer) Start(ctx context.Context) error {
c, err := d.getContainer(ctx)
if err != nil {
d.logger.Err(map[string]any{
"msg": "Cannot find container",
"err": err.Error(),
})
return ErrNotRunning
}
if err = d.client.ContainerStart(ctx, c.ID, types.ContainerStartOptions{}); err != nil {
d.logger.Err(map[string]any{
"msg": "Cannot start container",
"err": err.Error(),
})
return ErrNotRunning
}
return nil
}
func (d *DockerContainer) Stop(ctx context.Context) error {
c, err := d.getContainer(ctx)
if err != nil {
d.logger.Err(map[string]any{
"msg": "Cannot find container",
"err": err.Error(),
})
return ErrNotRunning
}
if err = d.client.ContainerStop(ctx, c.ID, container.StopOptions{}); err != nil {
d.logger.Err(map[string]any{
"msg": "Cannot stop container",
"err": err.Error(),
})
return ErrCannotStop
}
return nil
}
func (d *DockerContainer) Logs(ctx context.Context) []string {
c, err := d.getContainer(ctx)
if err != nil {
d.logger.Err(map[string]any{
"msg": "Cannot find container",
"err": err.Error(),
})
return nil
}
conf, err := d.client.ContainerInspect(ctx, c.ID)
if err != nil {
d.logger.Err(map[string]any{
"msg": "Cannot inspect container",
"err": err.Error(),
})
return nil
}
reader, err := d.client.ContainerLogs(ctx, c.ID, types.ContainerLogsOptions{
ShowStdout: true,
ShowStderr: true,
Tail: strconv.Itoa(bufLines),
})
if err != nil {
d.logger.Err(map[string]any{
"msg": "Cannot stop container",
"err": err.Error(),
})
return nil
}
if !conf.Config.Tty {
return d.consumeStreams(reader)
}
return d.consumeStream(reader)
}
func (d *DockerContainer) Liveness(ctx context.Context) error {
c, err := d.getContainer(ctx)
if err != nil {
d.logger.Err(map[string]any{
"msg": "Cannot find container",
"err": err.Error(),
})
return ErrNotRunning
}
if c.State != "running" {
d.logger.Debug(map[string]any{
"msg": "Container not running",
"state": c.State,
})
return ErrNotRunning
}
return nil
}
func (d *DockerContainer) getContainer(ctx context.Context) (*types.Container, error) {
containers, err := d.client.ContainerList(ctx, types.ContainerListOptions{
Filters: filters.NewArgs(filters.KeyValuePair{Key: "name", Value: d.name}),
})
if err != nil {
return nil, err
}
d.logger.Debug(map[string]any{
"msg": "Containers found",
"containers": containers,
})
switch len(containers) {
case 0:
return nil, ErrNotFound
case 1:
return &containers[0], nil
default:
return nil, ErrTooMany
}
}
func (d *DockerContainer) consumeStream(r io.Reader) (result []string) {
scanner := bufio.NewScanner(r)
for scanner.Scan() {
if err := scanner.Err(); err != nil {
d.logger.Err(map[string]any{
"msg": "Failed to consume stream",
"err": err.Error(),
})
return nil
}
result = append(result, scanner.Text())
}
return
}
func (d *DockerContainer) consumeStreams(r io.Reader) (result []string) {
rout, wout := io.Pipe()
rerr, werr := io.Pipe()
if _, err := stdcopy.StdCopy(wout, werr, r); err != nil {
d.logger.Err(map[string]any{
"msg": "Failed to consume stream",
"err": err.Error(),
})
return nil
}
result = append(result, d.consumeStream(rout)...)
result = append(result, d.consumeStream(rerr)...)
return
}

17
go.mod
View File

@ -8,15 +8,32 @@ require (
git.sr.ht/~blallo/logz/zlog v0.0.0-20220324191132-95d94ae8e337
github.com/cenkalti/backoff/v4 v4.2.0
github.com/coreos/go-systemd/v22 v22.5.0
github.com/docker/docker v23.0.1+incompatible
github.com/go-chi/chi/v5 v5.0.8
github.com/gorilla/websocket v1.5.0
github.com/stretchr/testify v1.8.1
)
require (
github.com/Microsoft/go-winio v0.6.0 // indirect
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/docker/distribution v2.8.1+incompatible // indirect
github.com/docker/go-connections v0.4.0 // indirect
github.com/docker/go-units v0.5.0 // indirect
github.com/godbus/dbus/v5 v5.0.4 // indirect
github.com/gogo/protobuf v1.3.2 // indirect
github.com/moby/term v0.0.0-20221205130635-1aeaba878587 // indirect
github.com/morikuni/aec v1.0.0 // indirect
github.com/opencontainers/go-digest v1.0.0 // indirect
github.com/opencontainers/image-spec v1.0.2 // indirect
github.com/pkg/errors v0.9.1 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/rs/zerolog v1.26.1 // indirect
golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 // indirect
golang.org/x/net v0.0.0-20220722155237-a158d28d115b // indirect
golang.org/x/sys v0.1.0 // indirect
golang.org/x/time v0.3.0 // indirect
golang.org/x/tools v0.1.12 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
gotest.tools/v3 v3.4.0 // indirect
)

53
go.sum
View File

@ -4,6 +4,9 @@ git.sr.ht/~blallo/logz/testlogger v0.0.0-20230212191205-53d5ce2c0d54 h1:CHxlq5zr
git.sr.ht/~blallo/logz/testlogger v0.0.0-20230212191205-53d5ce2c0d54/go.mod h1:qOrf0RE20YqvShbkT+uZ1YfTOp8DYVIldF2Q9umhpOo=
git.sr.ht/~blallo/logz/zlog v0.0.0-20220324191132-95d94ae8e337 h1:4oSLCsOXU0sRwEwn5+VIQQ0E2YhUFrnNuZkv+umipo0=
git.sr.ht/~blallo/logz/zlog v0.0.0-20220324191132-95d94ae8e337/go.mod h1:9fUP8ioBX7rzNIBYPvi7irK/ZSug4gLDInl0CJvHgys=
github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOElx5B5HZ4hJQsoJ/PvUvKRhJHDQXO8P8=
github.com/Microsoft/go-winio v0.6.0 h1:slsWYD/zyx7lCXoZVlvQrj0hPTM1HI4+v1sIda2yDvg=
github.com/Microsoft/go-winio v0.6.0/go.mod h1:cTAf44im0RAYeL23bpB+fzCyDH2MJiz2BO69KH/soAE=
github.com/cenkalti/backoff/v4 v4.2.0 h1:HN5dHm3WBOgndBH6E8V0q2jIYIR3s9yglV8k/+MN3u4=
github.com/cenkalti/backoff/v4 v4.2.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
@ -12,12 +15,35 @@ github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSV
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/docker/distribution v2.8.1+incompatible h1:Q50tZOPR6T/hjNsyc9g8/syEs6bk8XXApsHjKukMl68=
github.com/docker/distribution v2.8.1+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
github.com/docker/docker v23.0.1+incompatible h1:vjgvJZxprTTE1A37nm+CLNAdwu6xZekyoiVlUZEINcY=
github.com/docker/docker v23.0.1+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4=
github.com/docker/go-units v0.5.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
github.com/go-chi/chi/v5 v5.0.8 h1:lD+NLqFcAi1ovnVZpsnObHGW4xb4J8lNmoYVfECH1Y0=
github.com/go-chi/chi/v5 v5.0.8/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
github.com/godbus/dbus/v5 v5.0.4 h1:9349emZab16e7zQvpmsbtjc18ykshndd8y2PG3sgJbA=
github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWmnc=
github.com/gorilla/websocket v1.5.0/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
github.com/moby/term v0.0.0-20221205130635-1aeaba878587 h1:HfkjXDfhgVaN5rmueG8cL8KKeFNecRCXFhaJ2qZ5SKA=
github.com/moby/term v0.0.0-20221205130635-1aeaba878587/go.mod h1:8FzsFHVUBGZdbDsJw/ot+X+d5HLUbvklYLJ9uGfcI3Y=
github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
github.com/opencontainers/image-spec v1.0.2 h1:9yCKha/T5XdGtO0q9Q9a6T5NUCsTn/DrBg0D7ufOcFM=
github.com/opencontainers/image-spec v1.0.2/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zMzWCbyJoFRP3s7yZA0=
github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
@ -31,34 +57,61 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.0.0-20211215165025-cf75a172585e/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 h1:6zppjxzCulZykYSLyVDYbneBfbaBIQPYMevg0bEwv2s=
golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
golang.org/x/net v0.0.0-20220722155237-a158d28d115b h1:PxfKdU9lEEDYjdIzOtC4qFWgkU2rGHdKlKowJSMN9h0=
golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.1.0 h1:kunALQeHf1/185U1i0GOB/fy1IPRDDpuoOOqRReG57U=
golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
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