Add CLI command to retrieve metrics in clickhouse database (#59)

1. Add CLI commands to get diagnostic infos about Clickhouse DB
2. Add e2e test for theia CLI

Signed-off-by: Yun-Tang Hsu <hsuy@vmware.com>

ci/jenkins/test-vmc.sh

@@ -337,6 +337,8 @@ function deliver_antrea {
 
     ${GIT_CHECKOUT_DIR}/hack/generate-manifest.sh --ch-size 100Mi --ch-monitor-threshold 0.1 > ${GIT_CHECKOUT_DIR}/build/yamls/flow-visibility.yml
     ${GIT_CHECKOUT_DIR}/hack/generate-manifest.sh --no-grafana --spark-operator > ${GIT_CHECKOUT_DIR}/build/yamls/flow-visibility-with-spark.yml
+    ${GIT_CHECKOUT_DIR}/hack/generate-manifest.sh --no-grafana > ${GIT_CHECKOUT_DIR}/build/yamls/flow-visibility-ch-only.yml
+
 
     ${SCP_WITH_ANTREA_CI_KEY} $GIT_CHECKOUT_DIR/build/charts/theia/crds/clickhouse-operator-install-bundle.yaml capv@${control_plane_ip}:~
     ${SCP_WITH_ANTREA_CI_KEY} $GIT_CHECKOUT_DIR/build/yamls/*.yml capv@${control_plane_ip}:~

ci/kind/test-e2e-kind.sh

@@ -40,6 +40,7 @@ TESTBED_CMD=$(dirname $0)"/kind-setup.sh"
 YML_DIR=$(dirname $0)"/../../build/yamls"
 FLOW_VISIBILITY_CMD=$(dirname $0)"/../../hack/generate-manifest.sh --ch-size 100Mi --ch-monitor-threshold 0.1"
 FLOW_VISIBILITY_WITH_SPARK_CMD=$(dirname $0)"/../../hack/generate-manifest.sh --no-grafana --spark-operator"
+FLOW_VISIBILITY_CH_ONLY_CMD=$(dirname $0)"/../../hack/generate-manifest.sh --no-grafana"
 CH_OPERATOR_YML=$(dirname $0)"/../../build/charts/theia/crds/clickhouse-operator-install-bundle.yaml"
 
 make theia-linux
@@ -161,13 +162,14 @@ function run_test {
   docker exec -i kind-control-plane dd of=/root/clickhouse-operator-install-bundle.yaml < $CH_OPERATOR_YML
   $FLOW_VISIBILITY_CMD | docker exec -i kind-control-plane dd of=/root/flow-visibility.yml
   $FLOW_VISIBILITY_WITH_SPARK_CMD | docker exec -i kind-control-plane dd of=/root/flow-visibility-with-spark.yml
+  $FLOW_VISIBILITY_CH_ONLY_CMD | docker exec -i kind-control-plane dd of=/root/flow-visibility-ch-only.yml
 
   docker exec -i kind-control-plane dd of=/root/theia < $THEIACTL_BIN
 
   rm -rf $TMP_DIR
   sleep 1
 
-  go test -v -timeout=20m antrea.io/theia/test/e2e -provider=kind --logs-export-dir=$ANTREA_LOG_DIR --skip=$skiplist
+  go test -v -timeout=30m antrea.io/theia/test/e2e -provider=kind --logs-export-dir=$ANTREA_LOG_DIR --skip=$skiplist
 }
 
 echo "======== Test encap mode =========="

docs/theia-cli.md

@@ -8,6 +8,12 @@ visibility capabilities.
 <!-- toc -->
 - [Installation](#installation)
 - [Usage](#usage)
+  - [NetworkPolicy Recommendation feature](#networkpolicy-recommendation-feature)
+  - [ClickHouse](#clickhouse)
+    - [Disk usage information](#disk-usage-information)
+    - [Table Information](#table-information)
+    - [Insertion rate](#insertion-rate)
+    - [Stack trace](#stack-trace)
 <!-- /toc -->
 
 ## Installation
@@ -36,8 +42,11 @@ theia help
 
 ## Usage
 
-To see the list of available commands and options, run `theia help`. Currently,
-we have 5 commands for the NetworkPolicy Recommendation feature:
+To see the list of available commands and options, run `theia help`.
+
+### NetworkPolicy Recommendation feature
+
+We currently have 5 commands for NetworkPolicy Recommendation:
 
 - `theia policy-recommendation run`
 - `theia policy-recommendation status`
@@ -47,3 +56,71 @@ we have 5 commands for the NetworkPolicy Recommendation feature:
 
 For details, please refer to [NetworkPolicy recommendation doc](
 networkpolicy-recommendation.md)
+
+### ClickHouse
+
+From Theia v0.2, we introduce one command for ClickHouse:
+
+- `theia clickhouse status [flags]`
+
+#### Disk usage information
+
+The `--diskInfo` flag will list disk usage information of each ClickHouse shard. `Shard`, `DatabaseName`, `Path`, `Free`
+, `Total` and `Used_Percentage`of each ClickHouse shard will be displayed in table format. For example:
+
+```bash
+> theia clickhouse status --diskInfo
+Shard          DatabaseName   Path                 Free           Total          Used_Percentage
+1              default        /var/lib/clickhouse/ 1.84 GiB       1.84 GiB       0.04 %
+```
+
+#### Table Information
+
+The `--tableInfo` flag will list basic table information of each ClickHouse shard. `Shard`, `DatabaseName`, `TableName`,
+`TotalRows`, `TotalBytes` and `TotalCol`of tables in each ClickHouse shard will be displayed in table format. For example:
+
+```bash
+> theia clickhouse status --tableInfo
+Shard          DatabaseName   TableName                TotalRows      TotalBytes     TotalCols
+1              default        .inner.flows_node_view   7              2.84 KiB       16
+1              default        .inner.flows_pod_view    131            5.00 KiB       20
+1              default        .inner.flows_policy_view 131            6.28 KiB       27
+1              default        flows                    267            18.36 KiB      49
+```
+
+#### Insertion rate
+
+The `--insertRate` flag will list the insertion rate of each ClickHouse shard. `Shard`, `RowsPerSecond`, and
+`BytesPerSecond` of each ClickHouse shard will be displayed in table format. For example:
+
+```bash
+> theia clickhouse status --insertRate
+Shard          RowsPerSecond  BytesPerSecond
+1              230            6.31 KiB
+```
+
+#### Stack trace
+
+If ClickHouse is busy with something, and you don’t know what’s happening, you can check the stacktraces of all
+the threads which are working.
+
+The `--stackTraces` flag will list the stacktraces of each ClickHouse shard. `Shard`, `trace_function`, and
+`count()` of each ClickHouse shard will be displayed in table format. For example:
+
+```bash
+> theia clickhouse status --stackTraces
+Row 1:
+-------
+Shard:           1
+trace_functions: pthread_cond_timedwait@@GLIBC_2.3.2\nPoco::EventImpl::waitImpl(long)\nPoco::NotificationQueue::
+waitDequeueNotification(long)\nDB::BackgroundSchedulePool::threadFunction()\n\nThreadPoolImpl<std::__1::thread>::
+worker(std::__1::__list_iterator<std::__1::thread, void*>)\n\nstart_thread\n__clone
+count():         128
+
+Row 2:         
+-------
+Shard:           1
+trace_functions: __poll\nPoco::Net::SocketImpl::pollImpl(Poco::Timespan&, int)\nPoco::Net::SocketImpl::poll(Poco::
+Timespan const&, int)\nPoco::Net::TCPServer::run()\nPoco::ThreadImpl::runnableEntry(void*)\nstart_thread\n__clone
+count():         5
+```

pkg/theia/commands/clickhouse.go

@@ -0,0 +1,44 @@
+// Copyright 2022 Antrea Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package commands
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var clickHouseCmd = &cobra.Command{
+	Use:     "clickhouse",
+	Aliases: []string{"ch"},
+	Short:   "Commands of Theia ClickHouse feature",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("Error: must also specify a subcommand to run like status")
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(clickHouseCmd)
+	clickHouseCmd.PersistentFlags().String(
+		"clickhouse-endpoint",
+		"",
+		"The ClickHouse service endpoint.")
+	clickHouseCmd.PersistentFlags().Bool(
+		"use-cluster-ip",
+		false,
+		`Enable this option will use ClusterIP instead of port forwarding when connecting to the ClickHouse Service.
+It can only be used when running in cluster.`,
+	)
+}