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e7479e3ab8
In cases where a logging plugin has crashed when the daemon tries to copy the container stdio to the logging plugin it returns a broken pipe error and any log entries that occurr while the plugin is down are lost. Fix this by opening read+write in the daemon so logs are not lost while the plugin is down. Signed-off-by: Brian Goff <cpuguy83@gmail.com>
48 lines
986 B
Go
48 lines
986 B
Go
package main
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import (
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"encoding/json"
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"fmt"
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"net"
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"net/http"
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"os"
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)
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type start struct {
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File string
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}
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func main() {
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l, err := net.Listen("unix", "/run/docker/plugins/plugin.sock")
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if err != nil {
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panic(err)
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}
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mux := http.NewServeMux()
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mux.HandleFunc("/LogDriver.StartLogging", func(w http.ResponseWriter, req *http.Request) {
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startReq := &start{}
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if err := json.NewDecoder(req.Body).Decode(startReq); err != nil {
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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f, err := os.OpenFile(startReq.File, os.O_RDONLY, 0600)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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// Close the file immediately, this allows us to test what happens in the daemon when the plugin has closed the
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// file or, for example, the plugin has crashed.
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f.Close()
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w.WriteHeader(http.StatusOK)
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fmt.Fprintln(w, `{}`)
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})
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server := http.Server{
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Addr: l.Addr().String(),
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Handler: mux,
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}
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server.Serve(l)
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}
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