moby--moby/daemon/daemon_unsupported.go

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//go:build !linux && !freebsd && !windows
// +build !linux,!freebsd,!windows
package daemon // import "github.com/docker/docker/daemon"
import (
"errors"
"github.com/docker/docker/pkg/sysinfo"
)
func checkSystem() error {
return errors.New("the Docker daemon is not supported on this platform")
}
func setupResolvConf(_ *interface{}) {}
func getSysInfo(_ *Daemon) *sysinfo.SysInfo {
daemon.NewDaemon(): fix network feature detection on first start Commit 483aa6294b457ad4f60df91e46c0038a0e953dad introduced a regression, causing spurious warnings to be shown when starting a daemon for the first time after a fresh install: docker info ... WARNING: IPv4 forwarding is disabled WARNING: bridge-nf-call-iptables is disabled WARNING: bridge-nf-call-ip6tables is disabled The information shown is incorrect, as checking the corresponding options on the system, shows that these options are available: cat /proc/sys/net/ipv4/ip_forward 1 cat /proc/sys/net/bridge/bridge-nf-call-iptables 1 cat /proc/sys/net/bridge/bridge-nf-call-ip6tables 1 The reason this is failing is because the daemon itself reconfigures those options during networking initialization in `configureIPForwarding()`; https://github.com/moby/moby/blob/cf4595265e7703e1e9745a30f1dd265acbc075d3/libnetwork/drivers/bridge/setup_ip_forwarding.go#L14-L25 Network initialization happens in the `daemon.restore()` function within `daemon.NewDaemon()`: https://github.com/moby/moby/blob/cf4595265e7703e1e9745a30f1dd265acbc075d3/daemon/daemon.go#L475-L478 However, 483aa6294b457ad4f60df91e46c0038a0e953dad moved detection of features earlier in the `daemon.NewDaemon()` function, and collects the system information (`d.RawSysInfo()`) before we enter `daemon.restore()`; https://github.com/moby/moby/blob/cf4595265e7703e1e9745a30f1dd265acbc075d3/daemon/daemon.go#L1008-L1011 For optimization (collecting the system information comes at a cost), those results are cached on the daemon, and will only be performed once (using a `sync.Once`). This patch: - introduces a `getSysInfo()` utility, which collects system information without caching the results - uses `getSysInfo()` to collect the preliminary information needed at that point in the daemon's lifecycle. - moves printing warnings to the end of `daemon.NewDaemon()`, after all information can be read correctly. Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2022-06-03 15:35:23 +00:00
return sysinfo.New()
}