enable host name and default resolv.conf and hosts file in none network

Signed-off-by: Shubharanshu Mahapatra <[email protected]>

cmd/nerdctl/container/container_run_network_linux_test.go

@@ -504,6 +504,37 @@ func TestSharedNetworkStack(t *testing.T) {
 		AssertOutContains(testutil.NginxAlpineIndexHTMLSnippet)
 }
 
+func TestSharedNetworkWithNone(t *testing.T) {
+	if runtime.GOOS != "linux" {
+		t.Skip("--network=container:<container name|id> only supports linux now")
+	}
+	base := testutil.NewBase(t)
+
+	containerName := testutil.Identifier(t)
+	defer base.Cmd("rm", "-f", containerName).AssertOK()
+	base.Cmd("run", "-d", "--name", containerName, "--network", "none",
+		testutil.NginxAlpineImage).AssertOK()
+	base.EnsureContainerStarted(containerName)
+
+	containerNameJoin := testutil.Identifier(t) + "-network"
+	defer base.Cmd("rm", "-f", containerNameJoin).AssertOK()
+	base.Cmd("run",
+		"-d",
+		"--name", containerNameJoin,
+		"--network=container:"+containerName,
+		testutil.CommonImage,
+		"sleep", "infinity").AssertOK()
+
+	base.Cmd("exec", containerNameJoin, "wget", "-qO-", "http://127.0.0.1:80").
+		AssertOutContains(testutil.NginxAlpineIndexHTMLSnippet)
+
+	base.Cmd("restart", containerName).AssertOK()
+	base.Cmd("stop", "--time=1", containerNameJoin).AssertOK()
+	base.Cmd("start", containerNameJoin).AssertOK()
+	base.Cmd("exec", containerNameJoin, "wget", "-qO-", "http://127.0.0.1:80").
+		AssertOutContains(testutil.NginxAlpineIndexHTMLSnippet)
+}
+
 func TestRunContainerInExistingNetNS(t *testing.T) {
 	if rootlessutil.IsRootless() {
 		t.Skip("Can't create new netns in rootless mode")
@@ -629,6 +660,8 @@ func TestHostsFileMounts(t *testing.T) {
 		"sh", "-euxc", "echo >> /etc/hosts").AssertOK()
 	base.Cmd("run", "--rm", "-v", "/etc/hosts:/etc/hosts", "--network", "host", testutil.CommonImage,
 		"sh", "-euxc", "head -n -1 /etc/hosts > temp && cat temp > /etc/hosts").AssertOK()
+	base.Cmd("run", "--rm", "--network", "none", testutil.CommonImage,
+		"sh", "-euxc", "echo >> /etc/hosts").AssertOK()
 
 	base.Cmd("run", "--rm", testutil.CommonImage,
 		"sh", "-euxc", "echo >> /etc/resolv.conf").AssertOK()
@@ -641,6 +674,8 @@ func TestHostsFileMounts(t *testing.T) {
 		"sh", "-euxc", "echo >> /etc/resolv.conf").AssertOK()
 	base.Cmd("run", "--rm", "-v", "/etc/resolv.conf:/etc/resolv.conf", "--network", "host", testutil.CommonImage,
 		"sh", "-euxc", "head -n -1 /etc/resolv.conf > temp && cat temp > /etc/resolv.conf").AssertOK()
+	base.Cmd("run", "--rm", "--network", "host", testutil.CommonImage,
+		"sh", "-euxc", "echo >> /etc/resolv.conf").AssertOK()
 }
 
 func TestRunContainerWithStaticIP6(t *testing.T) {
@@ -712,3 +747,42 @@ func TestRunContainerWithStaticIP6(t *testing.T) {
 		})
 	}
 }
+
+func TestNoneNetworkStaticConfigs(t *testing.T) {
+	testutil.DockerIncompatible(t)
+	base := testutil.NewBase(t)
+
+	cmd := base.Cmd("run", "--rm", "--net", "none", testutil.CommonImage, "cat", "/etc/hosts")
+	cmd.AssertOutContains("127.0.0.1	localhost")
+	cmd.AssertOutContains("::1	localhost")
+
+	cmd = base.Cmd("run", "--rm", "--net", "none", testutil.CommonImage, "cat", "/etc/resolv.conf")
+	cmd.AssertOutContains("nameserver 127.0.0.1")
+
+	// If running on Linux, verify /etc/hostname is correctly set
+	if runtime.GOOS == "linux" {
+		containerHostName := "testcontainer"
+		cmd := base.Cmd("run", "--rm", "--net", "none", "--hostname", containerHostName, testutil.CommonImage, "cat", "/etc/hostname")
+		output := cmd.Run().Combined()
+		hostname := strings.TrimSpace(output)
+
+		if len(containerHostName) > 12 {
+			assert.Equal(t, containerHostName[:12], hostname[:12])
+		} else {
+			assert.Equal(t, containerHostName, hostname[:12])
+		}
+
+		containerName := "testNoneNetworkHostname"
+		defer base.Cmd("rm", "-f", containerName).AssertOK()
+		cmd = base.Cmd("run", "-d", "--net", "none", "--name", containerName, testutil.CommonImage, "sleep", "infinity")
+		output = cmd.Run().Combined()
+		containerIDShort := strings.TrimSpace(output)[:12]
+
+		cmd = base.Cmd("exec", containerName, "cat", "/etc/hostname")
+		output = cmd.Run().Combined()
+		containerHostName = strings.TrimSpace(output)
+
+		assert.Equal(t, containerHostName, containerIDShort)
+
+	}
+}

go.mod

@@ -15,6 +15,7 @@ require (
 	github.com/containerd/accelerated-container-image v1.2.3
 	github.com/containerd/cgroups/v3 v3.0.3
 	github.com/containerd/console v1.0.4
+	github.com/containerd/containerd v1.7.23
 	github.com/containerd/containerd/api v1.8.0-rc.4
 	github.com/containerd/containerd/v2 v2.0.0-rc.6
 	github.com/containerd/continuity v0.4.4
@@ -23,6 +24,7 @@ require (
 	github.com/containerd/go-cni v1.1.10
 	github.com/containerd/imgcrypt/v2 v2.0.0-rc.1
 	github.com/containerd/log v0.1.0
+	github.com/containerd/nerdctl v1.7.7
 	github.com/containerd/nydus-snapshotter v0.14.1-0.20240806063146-8fa319bfe9c5
 	github.com/containerd/platforms v0.2.1
 	github.com/containerd/stargz-snapshotter v0.15.2-0.20240709063920-1dac5ef89319
@@ -79,16 +81,17 @@ require (
 	github.com/AdaLogics/go-fuzz-headers v0.0.0-20240806141605-e8a1dd7889d6 // indirect
 	github.com/AdamKorcz/go-118-fuzz-build v0.0.0-20231105174938-2b5cbb29f3e2 // indirect
 	github.com/Azure/go-ansiterm v0.0.0-20230124172434-306776ec8161 // indirect
-	github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
+	github.com/awslabs/soci-snapshotter v0.4.1 // indirect
 	github.com/cilium/ebpf v0.16.0 // indirect
-	github.com/containerd/containerd v1.7.23 // indirect
 	github.com/containerd/errdefs/pkg v0.3.0 // indirect
 	github.com/containerd/go-runc v1.1.0 // indirect
+	github.com/containerd/imgcrypt v1.2.0-rc1 // indirect
 	github.com/containerd/plugin v0.1.0 // indirect
 	github.com/containerd/ttrpc v1.2.6-0.20240827082320-b5cd6e4b3287 // indirect
 	github.com/containers/ocicrypt v1.2.0 // indirect
 	github.com/djherbis/times v1.6.0 // indirect
 	github.com/docker/docker-credential-helpers v0.8.2 // indirect
+	github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/go-jose/go-jose/v4 v4.0.4 // indirect
 	github.com/go-logr/logr v1.4.2 // indirect
@@ -98,6 +101,7 @@ require (
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/google/go-cmp v0.6.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.8 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
@@ -119,12 +123,18 @@ require (
 	github.com/multiformats/go-varint v0.0.7 // indirect
 	github.com/opencontainers/runtime-tools v0.9.1-0.20221107090550-2e043c6bd626 // indirect
 	github.com/opencontainers/selinux v1.11.1 // indirect
+	github.com/pelletier/go-toml v1.9.5 // indirect
 	github.com/philhofer/fwd v1.1.3-0.20240612014219-fbbf4953d986 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
+	github.com/rootless-containers/rootlesskit v1.1.1 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
 	github.com/spaolacci/murmur3 v1.1.0 // indirect
 	github.com/stefanberger/go-pkcs11uri v0.0.0-20230803200340-78284954bff6 // indirect
+	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635 // indirect
+	github.com/tidwall/gjson v1.17.0 // indirect
+	github.com/tidwall/match v1.1.1 // indirect
+	github.com/tidwall/pretty v1.2.0 // indirect
 	github.com/tinylib/msgp v1.2.0 // indirect
 	github.com/vbatts/tar-split v0.11.5 // indirect
 	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
@@ -138,6 +148,7 @@ require (
 	go.opentelemetry.io/otel/trace v1.31.0 // indirect
 	golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56 // indirect
 	golang.org/x/mod v0.21.0 // indirect
+	google.golang.org/genproto v0.0.0-20240123012728-ef4313101c80 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20241021214115-324edc3d5d38 // indirect
 	google.golang.org/grpc v1.67.1 // indirect
 	google.golang.org/protobuf v1.35.1 // indirect

go.sum

@@ -14,6 +14,8 @@ github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERo
 github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
 github.com/Microsoft/hcsshim v0.12.8 h1:BtDWYlFMcWhorrvSSo2M7z0csPdw6t7no/C3FsSvqiI=
 github.com/Microsoft/hcsshim v0.12.8/go.mod h1:cibQ4BqhJ32FXDwPdQhKhwrwophnh3FuT4nwQZF907w=
+github.com/awslabs/soci-snapshotter v0.4.1 h1:f1TdTG5QZ1B6umgSPQfM1pSXDlMZu+raCKWP4QkRYL8=
+github.com/awslabs/soci-snapshotter v0.4.1/go.mod h1:faOXa3a6SsMRln4misZi82nAa4ez8Nu9i5N39kQyukY=
 github.com/blang/semver/v4 v4.0.0 h1:1PFHFE6yCCTv8C1TeyNNarDzntLi7wMI5i/pzqYIsAM=
 github.com/blang/semver/v4 v4.0.0/go.mod h1:IbckMUScFkM3pff0VJDNKRiT6TG/YpiHIM2yvyW5YoQ=
 github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 h1:DDGfHa7BWjL4YnC6+E63dPcxHo2sUxDIu8g3QgEJdRY=
@@ -49,10 +51,14 @@ github.com/containerd/go-cni v1.1.10 h1:c2U73nld7spSWfiJwSh/8W9DK+/qQwYM2rngIhCy
 github.com/containerd/go-cni v1.1.10/go.mod h1:/Y/sL8yqYQn1ZG1om1OncJB1W4zN3YmjfP/ShCzG/OY=
 github.com/containerd/go-runc v1.1.0 h1:OX4f+/i2y5sUT7LhmcJH7GYrjjhHa1QI4e8yO0gGleA=
 github.com/containerd/go-runc v1.1.0/go.mod h1:xJv2hFF7GvHtTJd9JqTS2UVxMkULUYw4JN5XAUZqH5U=
+github.com/containerd/imgcrypt v1.2.0-rc1 h1:XESaAcMqxrGlRjQIqLdzxqsO/ddNK4vwfe7MipXKVgg=
+github.com/containerd/imgcrypt v1.2.0-rc1/go.mod h1:F9roK2DzKlFnV+h+ZJy/r2FoS28bIvxKgdcoV7o8Sms=
 github.com/containerd/imgcrypt/v2 v2.0.0-rc.1 h1:7OMu5otk5Z2GeQs24JBPOmYbTc50+q6jo02qWNJc0p8=
 github.com/containerd/imgcrypt/v2 v2.0.0-rc.1/go.mod h1:3/Ab3iliBt/aBVNYOwecT1YagCqAiHidOmVsrjtHF1A=
 github.com/containerd/log v0.1.0 h1:TCJt7ioM2cr/tfR8GPbGf9/VRAX8D2B4PjzCpfX540I=
 github.com/containerd/log v0.1.0/go.mod h1:VRRf09a7mHDIRezVKTRCrOq78v577GXq3bSa3EhrzVo=
+github.com/containerd/nerdctl v1.7.7 h1:NmtSMmpF4qbS4aVj1/wyj2HTD3synzGFLXc4RC74Hwg=
+github.com/containerd/nerdctl v1.7.7/go.mod h1:tOE0YIYIwr/IyY3buGUmoinQ65nCPXNpnQZWafLAfrM=
 github.com/containerd/nydus-snapshotter v0.14.1-0.20240806063146-8fa319bfe9c5 h1:NpscnGdkmWwlb0o2Q+rDO/kfoLObfY2sHwB6M5uF58Q=
 github.com/containerd/nydus-snapshotter v0.14.1-0.20240806063146-8fa319bfe9c5/go.mod h1:t7X6QEMNSz69fl5e2pF56ibd4XJ6KH9dEBrLnSwyYQk=
 github.com/containerd/platforms v0.2.1 h1:zvwtM3rz2YHPQsF2CHYM8+KtB5dvhISiXh5ZpSBQv6A=
@@ -100,6 +106,8 @@ github.com/docker/docker-credential-helpers v0.8.2 h1:bX3YxiGzFP5sOXWc3bTPEXdEaZ
 github.com/docker/docker-credential-helpers v0.8.2/go.mod h1:P3ci7E3lwkZg6XiHdRKft1KckHiO9a2rNtyFbZ/ry9M=
 github.com/docker/go-connections v0.5.0 h1:USnMq7hx7gwdVZq1L49hLXaFtUdTADjXGp+uj1Br63c=
 github.com/docker/go-connections v0.5.0/go.mod h1:ov60Kzw0kKElRwhNs9UlUHAE/F9Fe6GLaXnqyDdmEXc=
+github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c h1:+pKlWGMw7gf6bQ+oDZB4KHQFypsfjYlq/C4rfL7D3g8=
+github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c/go.mod h1:Uw6UezgYA44ePAFQYUehOuCzmy5zmg/+nl2ZfMWGkpA=
 github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4=
 github.com/docker/go-units v0.5.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
@@ -163,6 +171,8 @@ github.com/google/pprof v0.0.0-20240424215950-a892ee059fd6 h1:k7nVchz72niMH6YLQN
 github.com/google/pprof v0.0.0-20240424215950-a892ee059fd6/go.mod h1:kf6iHlnVGwgKolg33glAes7Yg/8iWP8ukqeldJSO7jw=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
 github.com/hashicorp/errwrap v1.1.0 h1:OxrOeh75EUXMY8TBjag2fzXGZ40LB6IKw45YeGUDY2I=
 github.com/hashicorp/errwrap v1.1.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
@@ -257,6 +267,8 @@ github.com/opencontainers/runtime-tools v0.9.1-0.20221107090550-2e043c6bd626/go.
 github.com/opencontainers/selinux v1.9.1/go.mod h1:2i0OySw99QjzBBQByd1Gr9gSjvuho1lHsJxIJ3gGbJI=
 github.com/opencontainers/selinux v1.11.1 h1:nHFvthhM0qY8/m+vfhJylliSshm8G1jJ2jDMcgULaH8=
 github.com/opencontainers/selinux v1.11.1/go.mod h1:E5dMC3VPuVvVHDYmi78qvhJp8+M586T4DlDRYpFkyec=
+github.com/pelletier/go-toml v1.9.5 h1:4yBQzkHv+7BHq2PQUZF3Mx0IYxG7LsP222s7Agd3ve8=
+github.com/pelletier/go-toml v1.9.5/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=
 github.com/pelletier/go-toml/v2 v2.2.3 h1:YmeHyLY8mFWbdkNWwpr+qIL2bEqT0o95WSdkNHvL12M=
 github.com/pelletier/go-toml/v2 v2.2.3/go.mod h1:MfCQTFTvCcUyyvvwm1+G6H/jORL20Xlb6rzQu9GuUkc=
 github.com/philhofer/fwd v1.1.3-0.20240612014219-fbbf4953d986 h1:jYi87L8j62qkXzaYHAQAhEapgukhenIMZRBKTNRLHJ4=
@@ -273,6 +285,8 @@ github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDN
 github.com/rogpeppe/go-internal v1.11.0/go.mod h1:ddIwULY96R17DhadqLgMfk9H9tvdUzkipdSkR5nkCZA=
 github.com/rootless-containers/bypass4netns v0.4.1 h1:zyYM1uSG7/prAphD2vlJvx/MEKK91EjD2XaefGx5PKA=
 github.com/rootless-containers/bypass4netns v0.4.1/go.mod h1:slu3ygwy1x6ey78oBTNs7lpymyEimLBYoXOG76b+Q+Y=
+github.com/rootless-containers/rootlesskit v1.1.1 h1:F5psKWoWY9/VjZ3ifVcaosjvFZJOagX85U22M0/EQZE=
+github.com/rootless-containers/rootlesskit v1.1.1/go.mod h1:UD5GoA3dqKCJrnvnhVgQQnweMF2qZnf9KLw8EewcMZI=
 github.com/rootless-containers/rootlesskit/v2 v2.3.1 h1:wdYtdKxWFvVLby9ThMP6O6/v2q/GmOXbkRi+4m9nPW0=
 github.com/rootless-containers/rootlesskit/v2 v2.3.1/go.mod h1:tdtfS9ak4bGmwJRmcjsAzcHN5rJ3c5dB7yhSV10KTbk=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
@@ -289,8 +303,9 @@ github.com/stefanberger/go-pkcs11uri v0.0.0-20230803200340-78284954bff6 h1:pnnLy
 github.com/stefanberger/go-pkcs11uri v0.0.0-20230803200340-78284954bff6/go.mod h1:39R/xuhNgVhi+K0/zst4TLrJrVmbm6LVgl4A0+ZFS5M=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
-github.com/stretchr/objx v0.5.0 h1:1zr/of2m5FGMsad5YfcqgdqdWrIhu+EBEJRhR1U7z/c=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
+github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
@@ -301,6 +316,12 @@ github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsT
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635 h1:kdXcSzyDtseVEc4yCz2qF8ZrQvIDBJLl4S1c3GCXmoI=
 github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
+github.com/tidwall/gjson v1.17.0 h1:/Jocvlh98kcTfpN2+JzGQWQcqrPQwDrVEMApx/M5ZwM=
+github.com/tidwall/gjson v1.17.0/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
+github.com/tidwall/match v1.1.1 h1:+Ho715JplO36QYgwN9PGYNhgZvoUSc9X2c80KVTi+GA=
+github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM=
+github.com/tidwall/pretty v1.2.0 h1:RWIZEg2iJ8/g6fDDYzMpobmaoGh5OLl4AXtGUGPcqCs=
+github.com/tidwall/pretty v1.2.0/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
 github.com/tinylib/msgp v1.2.0 h1:0uKB/662twsVBpYUPbokj4sTSKhWFKB7LopO2kWK8lY=
 github.com/tinylib/msgp v1.2.0/go.mod h1:2vIGs3lcUo8izAATNobrCHevYZC/LMsJtw4JPiYPHro=
 github.com/urfave/cli v1.19.1/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
@@ -413,6 +434,8 @@ google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
+google.golang.org/genproto v0.0.0-20240123012728-ef4313101c80 h1:KAeGQVN3M9nD0/bQXnr/ClcEMJ968gUXJQ9pwfSynuQ=
+google.golang.org/genproto v0.0.0-20240123012728-ef4313101c80/go.mod h1:cc8bqMqtv9gMOr0zHg2Vzff5ULhhL2IXP4sbcn32Dro=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20241021214115-324edc3d5d38 h1:zciRKQ4kBpFgpfC5QQCVtnnNAcLIqweL7plyZRQHVpI=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20241021214115-324edc3d5d38/go.mod h1:GX3210XPVPUjJbTUbvwI8f2IpZDMZuPJWDzDuebbviI=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=

pkg/containerutil/container_network_manager.go

@@ -42,6 +42,7 @@ import (
 	"github.com/containerd/nerdctl/v2/pkg/mountutil"
 	"github.com/containerd/nerdctl/v2/pkg/netutil"
 	"github.com/containerd/nerdctl/v2/pkg/netutil/nettype"
+	"github.com/containerd/nerdctl/v2/pkg/resolvconf"
 	"github.com/containerd/nerdctl/v2/pkg/rootlessutil"
 	"github.com/containerd/nerdctl/v2/pkg/strutil"
 )
@@ -179,9 +180,68 @@ func (m *noneNetworkManager) InternalNetworkingOptionLabels(_ context.Context) (
 
 // ContainerNetworkingOpts Returns a slice of `oci.SpecOpts` and `containerd.NewContainerOpts` which represent
 // the network specs which need to be applied to the container with the given ID.
-func (m *noneNetworkManager) ContainerNetworkingOpts(_ context.Context, _ string) ([]oci.SpecOpts, []containerd.NewContainerOpts, error) {
+func (m *noneNetworkManager) ContainerNetworkingOpts(_ context.Context, containerID string) ([]oci.SpecOpts, []containerd.NewContainerOpts, error) {
 	// No options to return if no network settings are provided.
-	return []oci.SpecOpts{}, []containerd.NewContainerOpts{}, nil
+	dataStore, err := clientutil.DataStore(m.globalOptions.DataRoot, m.globalOptions.Address)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	stateDir, err := ContainerStateDirPath(m.globalOptions.Namespace, dataStore, containerID)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	resolvConfPath := filepath.Join(stateDir, "resolv.conf")
+	dns := []string{"127.0.0.1"}
+	dnsSearch := []string{}
+	dnsOptions := []string{}
+
+	// Call the Build function
+	_, err = resolvconf.Build(resolvConfPath, dns, dnsSearch, dnsOptions)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	hs, err := hostsstore.New(dataStore, m.globalOptions.Namespace)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	content := []byte(`127.0.0.1	localhost
+::1	localhost
+`)
+	etcHostsPath, err := hs.AllocHostsFile(containerID, content)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	specs := []oci.SpecOpts{
+		withDedupMounts("/etc/hosts", withCustomHosts(etcHostsPath)),
+		withDedupMounts("/etc/resolv.conf", withCustomResolvConf(resolvConfPath)),
+	}
+
+	// `/etc/hostname` does not exist on FreeBSD
+	if runtime.GOOS == "linux" {
+		// If no hostname is set, default to first 12 characters of the container ID.
+		hostname := m.netOpts.Hostname
+		if hostname == "" {
+			hostname = containerID
+			if len(hostname) > 12 {
+				hostname = hostname[0:12]
+			}
+		}
+		m.netOpts.Hostname = hostname
+
+		hostnameOpts, err := writeEtcHostnameForContainer(m.globalOptions, m.netOpts.Hostname, containerID)
+		if err != nil {
+			return nil, nil, err
+		}
+		if hostnameOpts != nil {
+			specs = append(specs, hostnameOpts...)
+		}
+	}
+	return specs, []containerd.NewContainerOpts{}, nil
 }
 
 // types.NetworkOptionsManager implementation for container networking settings.