runk: Modify kill command's error message for containerd tests

The error message when the kill command is executed with the container's
state == Stopped should be "container not running" because the containerd
tests expect that OCI runtimes return the error message and compare it.
If the error message is different from the expected one, the tests fail.

Fixes: #7650

Signed-off-by: Manabu Sugimoto <Manabu.Sugimoto@sony.com>

src/tools/runk/Cargo.lock

@@ -438,6 +438,16 @@ dependencies = [
  "dirs-sys",
 ]
 
+[[package]]
+name = "dirs-next"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b98cf8ebf19c3d1b223e151f99a4f9f0690dca41414773390fc824184ac833e1"
+dependencies = [
+ "cfg-if 1.0.0",
+ "dirs-sys-next",
+]
+
 [[package]]
 name = "dirs-sys"
 version = "0.3.7"
@@ -449,6 +459,17 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "dirs-sys-next"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ebda144c4fe02d1f7ea1a7d9641b6fc6b580adcfa024ae48797ecdeb6825b4d"
+dependencies = [
+ "libc",
+ "redox_users",
+ "winapi",
+]
+
 [[package]]
 name = "either"
 version = "1.6.1"
@@ -774,6 +795,7 @@ checksum = "1aab8fc367588b89dcee83ab0fd66b72b50b72fa1904d7095045ace2b0c81c35"
 name = "kata-sys-util"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "byteorder",
  "cgroups-rs",
  "chrono",
@@ -911,6 +933,7 @@ dependencies = [
  "slog-async",
  "slog-json",
  "slog-scope",
+ "slog-term",
 ]
 
 [[package]]
@@ -1512,6 +1535,12 @@ dependencies = [
  "zbus",
 ]
 
+[[package]]
+name = "rustversion"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ffc183a10b4478d04cbbbfc96d0873219d962dd5accaff2ffbd4ceb7df837f4"
+
 [[package]]
 name = "ryu"
 version = "1.0.9"
@@ -1659,6 +1688,19 @@ dependencies = [
  "slog",
 ]
 
+[[package]]
+name = "slog-term"
+version = "2.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87d29185c55b7b258b4f120eab00f48557d4d9bc814f41713f449d35b0f8977c"
+dependencies = [
+ "atty",
+ "slog",
+ "term",
+ "thread_local",
+ "time 0.3.9",
+]
+
 [[package]]
 name = "smallvec"
 version = "1.8.0"
@@ -1748,6 +1790,17 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "term"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c59df8ac95d96ff9bede18eb7300b0fda5e5d8d90960e76f8e14ae765eedbf1f"
+dependencies = [
+ "dirs-next",
+ "rustversion",
+ "winapi",
+]
+
 [[package]]
 name = "termcolor"
 version = "1.1.3"
@@ -1819,8 +1872,15 @@ dependencies = [
  "itoa",
  "libc",
  "num_threads",
+ "time-macros",
 ]
 
+[[package]]
+name = "time-macros"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42657b1a6f4d817cda8e7a0ace261fe0cc946cf3a80314390b22cc61ae080792"
+
 [[package]]
 name = "tokio"
 version = "1.28.1"

src/tools/runk/libcontainer/src/container.rs

@@ -103,7 +103,11 @@ impl Container {
                     "container {} can't be killed because it is {:?}",
                     self.status.id,
                     self.state
-                ));
+                )
+                // This error message mustn't be chagned because the containerd integration tests
+                // expect that OCI container runtimes return the message.
+                // Ref. https://github.com/containerd/containerd/blob/release/1.7/pkg/process/utils.go#L135
+                .context("container not running"));
             }
 
             let pid = Pid::from_raw(self.status.pid);