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145 lines
7.7 KiB
Markdown
145 lines
7.7 KiB
Markdown
What is Apache Guacamole?
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=========================
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[Apache Guacamole](http://guacamole.apache.org/) is a clientless remote desktop
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gateway. It supports standard protocols like VNC and RDP. We call it clientless
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because no plugins or client software are required.
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Thanks to HTML5, once Guacamole is installed on a server, all you need to
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access your desktops is a web browser.
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How to use this image
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=====================
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Using this image will require an existing, running Docker container with the
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[guacd image](https://registry.hub.docker.com/u/guacamole/guacd/), and another
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Docker container providing either a PostgreSQL or MySQL database.
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The name of the database and all associated credentials are specified with
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environment variables given when the container is created. All other
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configuration information is generated from the Docker links.
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Beware that you will need to initialize the database manually. Guacamole will
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not automatically create its own tables, but SQL scripts are provided to do
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this.
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Once the Guacamole image is running, Guacamole will be accessible at
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`http://[address of container]:8080/guacamole/`. The instructions below use the
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`-p 8080:8080` option to expose this port at the level of the machine hosting
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Docker, as well.
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Docker Secrets
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==============
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The string `_FILE` may be appended to some of the environment variables listed below if you are using MySQL or PostgreSQL authentication. This will cause the startup script to load the values for those variables from files within in the container. This is useful for specifying sensitive info, ie. passwords for the database, in secured files instead of plaintext environment variables, and is generally used for loading values from [Docker secrets](https://docs.docker.com/engine/swarm/secrets/#read-more-about-docker-secret-commands), which are stored in `/run/secrets/<secret_name>` within the container.
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It is important to note that the startup script is configured such that:
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1. You may mix the use of Docker secrets and normal environment variables. For example, you may wish to use `MYSQL_USER_FILE` and `MYSQL_PASSWORD_FILE`, but wish to specify the database name with `MYSQL_DATABASE`
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2. If both a normal environment variable and its corresponding secret are defined in the same command line or compose file, ie. `MYSQL_PASSWORD` and `MYSQL_PASSWORD_FILE`, precedence is given to the secret.
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Deploying Guacamole with PostgreSQL authentication
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--------------------------------------------------
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docker run --name some-guacamole --link some-guacd:guacd \
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--link some-postgres:postgres \
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-e POSTGRES_DATABASE=guacamole_db \
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-e POSTGRES_USER=guacamole_user \
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-e POSTGRES_PASSWORD=some_password \
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-e POSTGRES_DATABASE_FILE=/run/secrets/<secret_name> \
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-e POSTGRES_USER_FILE=/run/secrets/<secret_name> \
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-e POSTGRES_PASSWORD_FILE=/run/secrets/<secret_name> \
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-d -p 8080:8080 guacamole/guacamole
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Linking Guacamole to PostgreSQL requires three environment variables. If any of
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these environment variables are omitted, you will receive an error message, and
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the image will stop:
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1. `POSTGRES_DATABASE` - The name of the database to use for Guacamole authentication.
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2. `POSTGRES_USER` - The user that Guacamole will use to connect to PostgreSQL.
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3. `POSTGRES_PASSWORD` - The password that Guacamole will provide when connecting to PostgreSQL as `POSTGRES_USER`.
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4. `POSTGRES_DATABASE_FILE` - The path of the docker secret containing the name of database to use for Guacamole authentication.
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5. `POSTGRES_USER` - The path of the docker secret containing the name of the user that Guacamole will use to connect to PostgreSQL.
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6. `POSTGRES_PASSWORD` - The path of the docker secret containing the password that Guacamole will provide when connecting to PostgreSQL as `POSTGRES_USER`.
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### Initializing the PostgreSQL database
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If your database is not already initialized with the Guacamole schema, you will
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need to do so prior to using Guacamole. A convenience script for generating the
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necessary SQL to do this is included in the Guacamole image.
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To generate a SQL script which can be used to initialize a fresh PostgreSQL
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database
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[as documented in the Guacamole manual](http://guacamole.apache.org/doc/gug/jdbc-auth.html#jdbc-auth-postgresql):
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docker run --rm guacamole/guacamole /opt/guacamole/bin/initdb.sh --postgres > initdb.sql
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Alternatively, you can use the SQL scripts included with the
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guacamole-auth-jdbc extension from
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[the corresponding release](http://guacamole.apache.org/releases/).
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Once this script is generated, you must:
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1. Create a database for Guacamole within PostgreSQL, such as `guacamole_db`.
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2. Run the script on the newly-created database.
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3. Create a user for Guacamole within PostgreSQL with access to the tables and
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sequences of this database, such as `guacamole_user`.
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The process for doing this via the `psql` and `createdb` utilities included
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with PostgreSQL is documented in
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[the Guacamole manual](http://guacamole.apache.org/doc/gug/jdbc-auth.html#jdbc-auth-postgresql).
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Deploying Guacamole with MySQL authentication
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--------------------------------------------------
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docker run --name some-guacamole --link some-guacd:guacd \
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--link some-mysql:mysql \
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-e MYSQL_DATABASE=guacamole_db \
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-e MYSQL_USER=guacamole_user \
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-e MYSQL_PASSWORD=some_password \
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-e MYSQL_DATABASE_FILE=/run/secrets/<secret_name> \
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-e MYSQL_USER_FILE=/run/secrets/<secret_name> \
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-e MYSQL_PASSWORD_FILE=/run/secrets/<secret_name> \
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-d -p 8080:8080 guacamole/guacamole
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Linking Guacamole to MySQL requires three environment variables. If any of
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these environment variables are omitted, you will receive an error message, and
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the image will stop:
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1. `MYSQL_DATABASE` - The name of the database to use for Guacamole authentication.
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2. `MYSQL_USER` - The user that Guacamole will use to connect to MySQL.
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3. `MYSQL_PASSWORD` - The password that Guacamole will provide when connecting to MySQL as `MYSQL_USER`.
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4. `MYSQL_DATABASE_FILE` - The path of the docker secret containing the name of database to use for Guacamole authentication.
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5. `MYSQL_USER` - The path of the docker secret containing the name of the user that Guacamole will use to connect to MySQL.
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6. `MYSQL_PASSWORD` - The path of the docker secret containing the password that Guacamole will provide when connecting to MySQL as `MYSQL_USER`.
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### Initializing the MySQL database
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If your database is not already initialized with the Guacamole schema, you will
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need to do so prior to using Guacamole. A convenience script for generating the
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necessary SQL to do this is included in the Guacamole image.
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To generate a SQL script which can be used to initialize a fresh MySQL database
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[as documented in the Guacamole manual](http://guacamole.apache.org/doc/gug/jdbc-auth.html#jdbc-auth-mysql):
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docker run --rm guacamole/guacamole /opt/guacamole/bin/initdb.sh --mysql > initdb.sql
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Alternatively, you can use the SQL scripts included with
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[guacamole-auth-jdbc](https://github.com/apache/guacamole-client/tree/0.9.10-incubating/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema).
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Once this script is generated, you must:
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1. Create a database for Guacamole within MySQL, such as `guacamole_db`.
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2. Create a user for Guacamole within MySQL with access to this database, such
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as `guacamole_user`.
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3. Run the script on the newly-created database.
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The process for doing this via the `mysql` utility included with MySQL is
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documented in
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[the Guacamole manual](http://guacamole.apache.org/doc/gug/jdbc-auth.html#jdbc-auth-mysql).
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Reporting issues
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================
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Please report any bugs encountered by opening a new issue in
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[our JIRA](https://issues.apache.org/jira/browse/GUACAMOLE/).
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