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Several improvements and bug fixes related to graceful reloads

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Added a -grace flag to customize graceful shutdown period, fixed bugs related to closing file descriptors (and dup'ed fds), improved healthcheck signaling to parent, fixed a race condition with the graceful listener, etc. These improvements mainly provide better support for frequent reloading or unusual use cases of Start and Stop after a Restart (POSIX systems). This forum thread was valuable help in debugging: https://forum.golangbridge.org/t/bind-address-already-in-use-even-after-listener-closed/1510?u=matt
This commit is contained in:
Matthew Holt
2015-11-14 18:00:18 -07:00
parent 94c746c44f
commit b42334eb91
7 changed files with 113 additions and 76 deletions
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2
main.go
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@ -10,6 +10,7 @@ import (
"runtime"
"strconv"
"strings"
"time"
"github.com/mholt/caddy/caddy"
"github.com/mholt/caddy/caddy/letsencrypt"
@ -34,6 +35,7 @@ func init() {
flag.StringVar(&conf, "conf", "", "Configuration file to use (default="+caddy.DefaultConfigFile+")")
flag.StringVar(&cpu, "cpu", "100%", "CPU cap")
flag.StringVar(&letsencrypt.DefaultEmail, "email", "", "Default Let's Encrypt account email address")
flag.DurationVar(&caddy.GracefulTimeout, "grace", 5*time.Second, "Maximum duration of graceful shutdown")
flag.StringVar(&caddy.Host, "host", caddy.DefaultHost, "Default host")
flag.BoolVar(&caddy.HTTP2, "http2", true, "HTTP/2 support") // TODO: temporary flag until http2 merged into std lib
flag.StringVar(&logfile, "log", "", "Process log file")