Uninstall Apigee mTLS

Edge for Private Cloud v4.19.01

You can remove Apigee mTLS at any time. This section describes how to remove it and to verify that it has been removed.

To roll back the Apigee mTLS installation:

Log in to a node in your cluster. The order in which you do this does not matter.
Stop all components on the node, as the following example shows:
```
/opt/apigee/apigee-service/bin/apigee-all stop
```

Uninstall the apigee-mtls service by executing the following command:

/opt/apigee/apigee-service/bin/apigee-service apigee-mtls uninstall

Start all components on the node in the start order, as the following example shows:
```
/opt/apigee/apigee-service/bin/apigee-service component_name start
```
Repeat this process for each node in the cluster.

To verify that the uninstallation was successful, you can do the following (in any order):

On each node that is running ZooKeeper, check that the Consul services are not in the /usr/lib/systemd/system directory:
1. Change to the /usr/lib/systemd/system directory:
```
cd /usr/lib/systemd/system
```
2. Ensure that the following files are not in that directory:
  - consul_egress.service
  - consul_server.service
3. If either of these files is in the /usr/lib/systemd/system directory, delete it.
On each node that is running ZooKeeper, check to see if the apigee-mtls and apigee-mtls-consul directories exist:
1. Change to the Apigee root directory:
```
cd ${APIGEE_ROOT:-/opt/apigee}
```
2. Check the contents of the directory:
```
ls
```
3. Ensure that the following directories do not exist in this directory:
  - apigee-mtls-version
  - apigee-mtls-consul-version
4. If either of these directories exist, delete them.
In the same directory, ensure that symlinks to the following have been removed:
- apigee-mtls
- apigee-mtls-consul
To do this, use the find -L option, as the following example shows:
```
find -L ./
```
If symbolic links to these directories remain, you can remove them with either the rm or unlink commands.
On each node that is running ZooKeeper, check that Consul has been removed by using the which command:
```
which consul
```
This command should respond with a message similar to the following:
```
"/usr/bin/which: no consul in (...:/opt/apigee/apigee-adminapi-version/bin:...)"
```
Execute the following command as root or with sudo:
```
iptables -t nat -L OUTPUT
```
This command should display column headings but no data in the columns, as the following example shows:
```
target     prot opt source               destination   
```
Use yum to determine if the Apigee mTLS packages are installed:
```
yum list installed
```
This command should not display any packages matching the following:
- apigee-mtls-version
- apigee-mtls-consul-version