Merge branch 'v3' into PMM-5086-12634-agent-refactor

.gitignore

@@ -1,4 +1,4 @@
-build/pmm-server-docker/RPMS/
+build/
 *.swp
 *~
 tmp/

.gitmodules

@@ -1,14 +1,14 @@
+# PMM Client and Server Components
 [submodule "pmm"]
 	path = sources/pmm/src/github.com/percona/pmm
 	url = https://github.com/percona/pmm
 	branch = v3
 
 # PMM Client
-
 [submodule "node_exporter"]
 	path = sources/node_exporter/src/github.com/prometheus/node_exporter
 	url = https://github.com/percona/node_exporter.git
-	branch = main
+	branch = v3
 [submodule "mysqld_exporter"]
 	path = sources/mysqld_exporter/src/github.com/percona/mysqld_exporter
 	url = https://github.com/percona/mysqld_exporter.git
@@ -39,7 +39,6 @@
 	branch = release-v3.5.2
 
 # PMM Server
-
 [submodule "grafana-dashboards"]
 	path = sources/grafana-dashboards
 	url = https://github.com/percona/grafana-dashboards
@@ -52,6 +51,10 @@
 	path = sources/pmm-dump
 	url = https://github.com/percona/pmm-dump
 	branch = v3
+[submodule "watchtower"]
+	path = sources/watchtower/src/github.com/percona/watchtower
+	url = https://github.com/percona/watchtower
+	branch = main
 
 ## PMM Tests
 [submodule "pmm-qa"]

Makefile

@@ -14,18 +14,18 @@ help:                       ## Display this help message.
 	@grep '^[a-zA-Z]' $(MAKEFILE_LIST) | \
 	awk -F ':.*?## ' 'NF==2 {printf "  %-26s%s\n", $$1, $$2}'
 
-submodules:                 ## Update all sumodules .
+submodules:                 ## Update all sumodules.
 	git submodule update --init --remote --jobs 10
 	git submodule status
 
-deps:						## Get deps from repos
+deps:                       ## Get deps from repos.
 	python3 ci.py
 
-trigger:
-	git commit -m 'Trigger FB' --allow-empty
+trigger:                    ## Make an empty commit to trigger the build.
+	git commit -m 'chore: trigger FB' --allow-empty
 	git push
 
-prepare:					## Create new FB (new style)
+prepare:                    ## Create a new FB (new style).
 	python3 ci.py -g --prepare $(RUN_ARGS)
 
 clean:                      ## Clean build results.
@@ -36,8 +36,8 @@ purge:                      ## Clean cache and leftovers. Please run this when s
 	git submodule update
 	git submodule foreach 'git reset --hard && git clean -xdff'
 
-fb:                         ## Creates feature build branch.
-  # Usage: make fb mainBranch=v3 featureBranch=PMM-XXXX-name submodules="pmm pmm-managed"
+fb:                         ## Create a feature build branch.
+  # Usage: make fb mainBranch=v3 featureBranch=PMM-XXXX-branch-name submodules="pmm pmm-managed"
 	$(eval MAIN_BRANCH = $(or $(mainBranch),v3))
 	git checkout $(MAIN_BRANCH)
 	make purge

README.md

@@ -5,9 +5,9 @@ to our build system managed by Jenkins as it helps pull the right branches from
 
 # Installation of dependencies
 
-If you build with Python's script then you need to install the dependencies:
+If you intend to build PMM with 'ci.py' Python script, then you need to install the dependencies:
 
-```
+```shell
 pip install -r requirements.txt
 ```
 
@@ -18,29 +18,29 @@ To create a feature build (FB) you have to edit `ci.yml` and specify the branche
 ```yaml
 deps:
   - name: pmm
-    branch: PMM-0000-fix-everything
+    branch: PMM-0000-feature-branch
   - name: pmm-qa
-    branch: PMM-0000-fix-everything-and-even-more
+    branch: PMM-0000-bugfix-branch
 ```
 
-To build from a fork, you need to specify `url` for the dependency, for example:
+To build from a fork, you need to additionally specify `url` for the dependency, for example:
 
 ```yaml
 deps:
   - name: pmm-server
     url: https://github.com/<your-account>/pmm-server
-    branch: PMM-0000-fix-everything
+    branch: PMM-0000-feature-branch
 ```
 
-Next, you will commit changes to git and push them to the repo:
+Next, commit your changes to git and push them to the repo:
 
-```
+```shell
 git add ci.yml
 git commit -m 'use custom branches'
 git push
 ```
 
-Whenever you commit and push to a feature branch, a Jenkins job will be triggered and it will start building your feature. You can follow its progress right from the PR's actions (at the bottom of each PR).
+Whenever you commit and push to a feature branch, a Jenkins job will be triggered, which will start building your feature. You can follow its progress by following a github workflow link displayed at the bottom of each PR.
 
 ## Using a Personal Access Token (PAT)
 
@@ -54,21 +54,23 @@ The token requires the following permissions:
 
 It is recommended to set an expiration date for your token.
 
-if you use zsh:
+To make the Github token available to `ci.py`, add the following lines to your shell script:
+
+if you use `zsh` shell:
 
 ```console
 echo 'export GITHUB_API_TOKEN=********' >> ~/.zshrc
 source ~/.zshrc
 ```
 
-if you use bash:
+if you use `bash` shell:
 
 ```console
 echo 'export GITHUB_API_TOKEN=********' >> ~/.bash_profile
 source ~/.bash_profile
 ```
 
-NOTE: Please make sure you don't commit your PAT to github. Should the PAT accidentally leak out, please revoke it asap and re-create it.
+NOTE: Please make sure you DO NOT commit your PAT to github. Should the PAT accidentally leak out, please revoke it asap and re-create it.
 
 ## FAQ
 
@@ -77,15 +79,15 @@ NOTE: Please make sure you don't commit your PAT to github. Should the PAT accid
 If you use the same branch name in all repos then you can run:
 
 ```console
-make prepare <you branch name>
+make prepare <your-branch-name>
 ```
 
-Branches with "you branch name" will be used for all repos or the default branch (usually called `main`) if the branch with this name isn't found in the repo.
+Branch "your-branch-name" will be used for every submodule repo. If not found, the repo's default branch (usually `main`) will be used.
 
-If you want to create a FB from a fork, you can pass an environment variable "FORK_OWNER" which should be equal to your username in github and run:
+If you want to create a FB from a fork, you can pass an environment variable "FORK_OWNER", which should be set to your github username:
 
 ```console
-FORK_OWNER=<your username> make prepare <you branch name>
+FORK_OWNER=<your username> make prepare <your-branch-name>
 ```
 
 ### I got an error "...branch has no upstream branch"