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Gandi / ganesha_exporter

Prometheus exporter for NFS-Ganesha
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dbus.Store: length mismatch #4

Open XiJinyu opened 3 years ago

XiJinyu commented 3 years ago

When I use this tool, it report the following error:

[root@localhost bin]# ./ganesha_exporter 2021/08/12 10:59:44 dbus.Store: length mismatch panic: dbus.Store: length mismatch

goroutine 9 [running]: log.Panic(0xc0002056c0, 0x1, 0x1) /usr/lib/golang/src/log/log.go:351 +0xae github.com/Gandi/ganesha_exporter/dbus.ExportMgr.GetNFSv41IO(0x9bc080, 0xc0000a2000, 0x2711, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...) /root/go/pkg/mod/github.com/!gandi/ganesha_exporter@v0.1.0/dbus/export_mgr.go:105 +0x58a main.ExportsCollector.Collect(0x9bc080, 0xc0000a2000, 0xc0000260c0, 0xc0000260c1, 0xc0000260c2, 0xc0000260c3, 0xc0000b0120) /root/go/pkg/mod/github.com/!gandi/ganesha_exporter@v0.1.0/exportsCollector.go:282 +0x2e98 github.com/prometheus/client_golang/prometheus.DescribeByCollect.func1(0x9b6620, 0xc0000a2d50, 0xc0000b0120) /root/go/pkg/mod/github.com/prometheus/client_golang@v0.9.3/prometheus/collector.go:90 +0x3b created by github.com/prometheus/client_golang/prometheus.DescribeByCollect /root/go/pkg/mod/github.com/prometheus/client_golang@v0.9.3/prometheus/collector.go:89 +0x75

[root@localhost bin]# ./ganesha_exporter --web.telemetry-path="/1m" 2021/08/12 11:07:02 dbus.Store: length mismatch panic: dbus.Store: length mismatch

goroutine 38 [running]: log.Panic(0xc0002896c0, 0x1, 0x1) /usr/lib/golang/src/log/log.go:351 +0xae github.com/Gandi/ganesha_exporter/dbus.ExportMgr.GetNFSv41IO(0x9bc080, 0xc000214000, 0x2711, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...) /root/go/pkg/mod/github.com/!gandi/ganesha_exporter@v0.1.0/dbus/export_mgr.go:105 +0x58a main.ExportsCollector.Collect(0x9bc080, 0xc000214000, 0xc000208008, 0xc000208009, 0xc00020800a, 0xc00020800b, 0xc000226120) /root/go/pkg/mod/github.com/!gandi/ganesha_exporter@v0.1.0/exportsCollector.go:282 +0x2e98 github.com/prometheus/client_golang/prometheus.DescribeByCollect.func1(0x9b6620, 0xc000214d50, 0xc000226120) /root/go/pkg/mod/github.com/prometheus/client_golang@v0.9.3/prometheus/collector.go:90 +0x3b created by github.com/prometheus/client_golang/prometheus.DescribeByCollect /root/go/pkg/mod/github.com/prometheus/client_golang@v0.9.3/prometheus/collector.go:89 +0x75

[root@localhost bin]# ./ganesha_exporter --collector.exports.nfsv3 2021/08/12 11:13:10 dbus.Store: length mismatch panic: dbus.Store: length mismatch

goroutine 25 [running]: log.Panic(0xc0000ef6c0, 0x1, 0x1) /usr/lib/golang/src/log/log.go:351 +0xae github.com/Gandi/ganesha_exporter/dbus.ExportMgr.GetNFSv41IO(0x9bc080, 0xc0000ab8f0, 0x2711, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...) /root/go/pkg/mod/github.com/!gandi/ganesha_exporter@v0.1.0/dbus/export_mgr.go:105 +0x58a main.ExportsCollector.Collect(0x9bc080, 0xc0000ab8f0, 0xc0000c0aa0, 0xc0000c0aa1, 0xc0000c0aa2, 0xc0000c0aa3, 0xc00009e300) /root/go/pkg/mod/github.com/!gandi/ganesha_exporter@v0.1.0/exportsCollector.go:282 +0x2e98 github.com/prometheus/client_golang/prometheus.DescribeByCollect.func1(0x9b6620, 0xc0001d6660, 0xc00009e300) /root/go/pkg/mod/github.com/prometheus/client_golang@v0.9.3/prometheus/collector.go:90 +0x3b created by github.com/prometheus/client_golang/prometheus.DescribeByCollect /root/go/pkg/mod/github.com/prometheus/client_golang@v0.9.3/prometheus/collector.go:89 +0x75

How to slove it ?

hit1943 commented 2 years ago

in file export_mgr.go："ExportID" should be "uint16"，not "uint32", and all functions that use exportID as input param should also modified，because the ganesha dbus interface define export_id type for uint16

you can use this command to check dbus interface define: dbus-send --system --type=method_call --print-reply --dest=org.ganesha.nfsd /org/ganesha/nfsd/ExportMgr org.freedesktop.DBus.Introspectable.Introspect then you can see the params type define like this:

the input param exp_id's type is 'q'，which means uint16: image

so if your ganesha has more than 256 exports，you may need to midify your ganesha dbus interface define