README
¶
Description
use docker service to auto scale backend service
- handler: "tmpdocker"
# required
service_name: "demo-service"
# if no request after 20m will scale the service to 0 , if have request will scale to 1
freeze_timeout: "20m"
- handler: "reverse_proxy"
# set the server docker service backend
upstreams: [{ dial: "demo-service" }]
Build
git clone https://github.com/shynome/caddy2-tmpdocker.git
cd caddy2-tmpdocker
# download vendor 1
git clone https://github.com/shynome/caddy2-tmpdocker-vendor.git vendor
# download vendor 2
go mod download
cd cmd/caddy
go build -mod=vendor -o caddy
./caddy list-modules | grep docker
# you will see `http.handlers.tmpdocker` plugin
Test
docker service create -p 8081:80 --name test nginx:1.19.6-alpine@sha256:c2ce58e024275728b00a554ac25628af25c54782865b3487b11c21cafb7fabda
cd cmd/caddy
go run . run -config Caddyfile --adapter caddyfile
# another shell
docker service ls
curl http://127.0.0.1:8080
docker service ls
docker service rm test
Documentation
¶
Index ¶
- type TmpDocker
- func (TmpDocker) CaddyModule() caddy.ModuleInfo
- func (tmpd TmpDocker) GetRunning(serviceID string) (count int, err error)
- func (tmpd TmpDocker) GetTmpService() (*TmpService, error)
- func (tmpd *TmpDocker) Provision(ctx caddy.Context) error
- func (tmpd TmpDocker) ScaleDockerService() error
- func (tmpd TmpDocker) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.Handler) error
- func (tmpd TmpDocker) StopDockerService() error
- func (tmpd *TmpDocker) Validate() (err error)
- type TmpService
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type TmpDocker ¶
type TmpDocker struct {
ServiceName string `json:"service_name,omitempty"`
FreezeTimeout caddy.Duration `json:"freeze_timeout,omitempty"`
DockerHost string `json:"docker_host,omitempty"`
WakeTimeout caddy.Duration `json:"wake_timeout,omitempty"`
// contains filtered or unexported fields
}
TmpDocker is a middleware which can rewrite HTTP requests.
func (TmpDocker) CaddyModule ¶
func (TmpDocker) CaddyModule() caddy.ModuleInfo
CaddyModule returns the Caddy module information.
func (TmpDocker) GetRunning ¶
GetRunning node length
func (TmpDocker) GetTmpService ¶
func (tmpd TmpDocker) GetTmpService() (*TmpService, error)
GetTmpService v
func (TmpDocker) ScaleDockerService ¶
ScaleDockerService use docker
func (TmpDocker) StopDockerService ¶
StopDockerService use docker
type TmpService ¶
type TmpService struct {
ID string
Replicas uint64
ServiceSpec swarm.ServiceSpec
Version swarm.Version
}
TmpService v
Source Files
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