Make clear that Go 1.8 is required since GitLab 9.2

[ci skip]
Signed-off-by: Rémy Coutable <remy@rymai.me>

doc/update/9.1-to-9.2.md

@@ -70,7 +70,27 @@ curl --location https://yarnpkg.com/install.sh | bash -
 
 More information can be found on the [yarn website](https://yarnpkg.com/en/docs/install).
 
-### 5. Get latest code
+### 5. Update Go
+
+NOTE: GitLab 9.2 and higher only supports Go 1.8.3 and dropped support for Go
+1.5.x through 1.7.x. Be sure to upgrade your installation if necessary.
+
+You can check which version you are running with `go version`.
+
+Download and install Go:
+
+```bash
+# Remove former Go installation folder
+sudo rm -rf /usr/local/go
+
+curl --remote-name --progress https://storage.googleapis.com/golang/go1.8.3.linux-amd64.tar.gz
+echo '1862f4c3d3907e59b04a757cfda0ea7aa9ef39274af99a784f5be843c80c6772  go1.8.3.linux-amd64.tar.gz' | shasum -a256 -c - && \
+  sudo tar -C /usr/local -xzf go1.8.3.linux-amd64.tar.gz
+sudo ln -sf /usr/local/go/bin/{go,godoc,gofmt} /usr/local/bin/
+rm go1.8.3.linux-amd64.tar.gz
+```
+
+### 6. Get latest code
 
 ```bash
 cd /home/git/gitlab
@@ -97,7 +117,7 @@ cd /home/git/gitlab
 sudo -u git -H git checkout 9-2-stable-ee
 ```
 
-### 6. Update gitlab-shell
+### 7. Update gitlab-shell
 
 ```bash
 cd /home/git/gitlab-shell
@@ -107,11 +127,10 @@ sudo -u git -H git checkout v$(</home/git/gitlab/GITLAB_SHELL_VERSION)
 sudo -u git -H bin/compile
 ```
 
-### 7. Update gitlab-workhorse
+### 8. Update gitlab-workhorse
 
-Install and compile gitlab-workhorse. This requires
-[Go 1.8](https://golang.org/dl). Go (at least 1.5) should already be on your system from
-GitLab 8.1 and shall be upgraded if necessary. Please note that starting in Gitlab 9.3, only Go 1.8.3 and above will be supported. GitLab-Workhorse uses [GNU Make](https://www.gnu.org/software/make/).
+Install and compile gitlab-workhorse. GitLab-Workhorse uses
+[GNU Make](https://www.gnu.org/software/make/).
 If you are not using Linux you may have to run `gmake` instead of
 `make` below.
 
@@ -123,7 +142,7 @@ sudo -u git -H git checkout v$(</home/git/gitlab/GITLAB_WORKHORSE_VERSION)
 sudo -u git -H make
 ```
 
-### 8. Update configuration files
+### 9. Update configuration files
 
 #### New configuration options for `gitlab.yml`
 
@@ -197,7 +216,7 @@ For Ubuntu 16.04.1 LTS:
 sudo systemctl daemon-reload
 ```
 
-### 9. Install libs, migrations, etc.
+### 10. Install libs, migrations, etc.
 
 ```bash
 cd /home/git/gitlab
@@ -223,7 +242,7 @@ sudo -u git -H bundle exec rake cache:clear RAILS_ENV=production
 
 **MySQL installations**: Run through the `MySQL strings limits` and `Tables and data conversion to utf8mb4` [tasks](../install/database_mysql.md).
 
-### 10. Optional: install Gitaly
+### 11. Optional: install Gitaly
 
 Gitaly is still an optional component of GitLab. If you want to save time
 during your 9.2 upgrade **you can skip this step**.
@@ -240,14 +259,14 @@ sudo -u git -H git checkout v$(</home/git/gitlab/GITALY_SERVER_VERSION)
 sudo -u git -H make
 ```
 
-### 11. Start application
+### 12. Start application
 
 ```bash
 sudo service gitlab start
 sudo service nginx restart
 ```
 
-### 12. Check application status
+### 13. Check application status
 
 Check if GitLab and its environment are configured correctly:
 

doc/update/9.2-to-9.3.md

@@ -72,8 +72,8 @@ More information can be found on the [yarn website](https://yarnpkg.com/en/docs/
 
 ### 5. Update Go
 
-NOTE: GitLab 9.3 and higher only supports Go 1.8.3 and dropped support for Go 1.5.x through 1.7.x. Be
-sure to upgrade your installation if necessary
+NOTE: GitLab 9.2 and higher only supports Go 1.8.3 and dropped support for Go
+1.5.x through 1.7.x. Be sure to upgrade your installation if necessary.
 
 You can check which version you are running with `go version`.
 
@@ -129,9 +129,8 @@ sudo -u git -H bin/compile
 
 ### 8. Update gitlab-workhorse
 
-Install and compile gitlab-workhorse. This requires
-[Go 1.5](https://golang.org/dl) which should already be on your system from
-GitLab 8.1. GitLab-Workhorse uses [GNU Make](https://www.gnu.org/software/make/).
+Install and compile gitlab-workhorse. GitLab-Workhorse uses
+[GNU Make](https://www.gnu.org/software/make/).
 If you are not using Linux you may have to run `gmake` instead of
 `make` below.