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syscall: update check for UserNS support for centos 7
Fixes #20796 Fixes #16283 Change-Id: Ib11992fbd2bc1fbb3b14ae5a6bf0da2e4c12f641 Reviewed-on: https://go-review.googlesource.com/49311 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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@ -57,6 +57,14 @@ func checkUserNS(t *testing.T) {
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t.Skip("kernel prohibits user namespace in unprivileged process")
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}
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}
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// On Centos 7 make sure they set the kernel parameter user_namespace=1
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// See issue 16283 and 20796.
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if _, err := os.Stat("/sys/module/user_namespace/parameters/enable"); err == nil {
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buf, _ := ioutil.ReadFile("/sys/module/user_namespace/parameters/enabled")
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if !strings.HasPrefix(string(buf), "Y") {
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t.Skip("kernel doesn't support user namespaces")
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}
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}
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// When running under the Go continuous build, skip tests for
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// now when under Kubernetes. (where things are root but not quite)
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// Both of these are our own environment variables.
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