Force intepret kubectl response encoding as UTF8

lib/krane/kubectl.rb

@@ -34,7 +34,16 @@ def run(*args, log_failure: nil, use_context: true, use_namespace: true, output:
       (1..attempts).to_a.each do |current_attempt|
         logger.debug("Running command (attempt #{current_attempt}): #{cmd.join(' ')}")
         out, err, st = Open3.capture3(*cmd)
-        logger.debug("Kubectl out: " + out.gsub(/\s+/, ' ')) unless output_is_sensitive
+
+        # https://github.com/Shopify/krane/issues/395
+        if out.encoding != Encoding::UTF_8
+          out = out.dup.force_encoding(Encoding::UTF_8)
+        end
+
+        if logger.debug? && !output_is_sensitive
+          # don't do the gsub unless we're going to print this
+          logger.debug("Kubectl out: " + out.gsub(/\s+/, ' '))
+        end
 
         break if st.success?
         raise(ResourceNotFoundError, err) if err.match(ERROR_MATCHERS[:not_found]) && raise_if_not_found

test/unit/krane/kubectl_test.rb

@@ -348,6 +348,16 @@ def test_retry_delay_backoff
     end
   end
 
+  def test_debug_level_output_log_uses_correct_encoding
+    logger.level = ::Logger::DEBUG
+    good = "hélas"
+    bad = good.dup.force_encoding(Encoding::US_ASCII)
+
+    stub_open3(%W(kubectl get pods --namespace=testn --context=testc --request-timeout=#{timeout}), resp: bad)
+    out, _err, _st = build_kubectl.run("get", "pods")
+    assert_equal good, out
+  end
+
   private
 
   def timeout