Name: WALinuxAgent
Owner: Clear Linux* Project for Intel Architecture
Description: Microsoft Azure Linux Guest Agent
Forked from: Azure/WALinuxAgent
Created: 2016-10-20 18:13:12.0
Updated: 2016-10-20 18:13:14.0
Pushed: 2018-02-07 21:42:21.0
Homepage: http://azure.microsoft.com/
Size: 7147
Language: Python
GitHub Committers
User | Most Recent Commit | # Commits |
---|
Other Committers
User | Most Recent Commit | # Commits |
---|
The Microsoft Azure Linux Agent (waagent) manages Linux & FreeBSD provisioning, and VM interaction with the Azure Fabric Controller. It provides the following functionality for Linux and FreeBSD IaaS deployments:
Image Provisioning
Networking
Kernel
Diagnostics
SCVMM Deployments
VM Extension
The information flow from the platform to the agent occurs via two channels:
A boot-time attached DVD for IaaS deployments. This DVD includes an OVF-compliant configuration file that includes all provisioning information other than the actual SSH keypairs.
A TCP endpoint exposing a REST API used to obtain deployment and topology configuration.
The following systems have been tested and are known to work with the Azure Linux Agent. Please note that this list may differ from the official list of supported systems on the Microsoft Azure Platform as described here: http://support.microsoft.com/kb/2805216
Supported Linux Distributions:
Other Supported Systems:
Waagent depends on some system packages in order to function properly:
Installation via your distribution's package repository is preferred. You can also customize your own RPM or DEB packages using the configuration samples provided (see deb and rpm sections below).
For more advanced installation options, such as installing to custom locations or prefixes, you can use setuptools to install from source by running:
#sudo python setup.py install --register-service
You can view more installation options by running:
#sudo python setup.py install --help
The agent's log file is kept at /var/log/waagent.log.
Upgrading via your distribution's package repository is preferred.
If upgrading manually, same with installation above by running:
#sudo python setup.py install --force
Restart waagent service,for most of linux distributions:
#sudo service waagent restart
For Ubuntu, use:
#sudo service walinuxagent restart
For CoreOS, use:
#sudo systemctl restart waagent
The agent's log file is kept at /var/log/waagent.log.
Flags:
-verbose: Increase verbosity of specified command
-force: Skip interactive confirmation for some commands
Commands:
-help: Lists the supported commands and flags.
-deprovision: Attempt to clean the system and make it suitable for re-provisioning, by deleting the following:
All SSH host keys (if Provisioning.RegenerateSshHostKeyPair is 'y' in the configuration file)
Nameserver configuration in /etc/resolv.conf
Root password from /etc/shadow (if Provisioning.DeleteRootPassword is 'y' in the configuration file)
Cached DHCP client leases
Resets host name to localhost.localdomain
WARNING! Deprovision does not guarantee that the image is cleared of all sensitive information and suitable for redistribution.
-deprovision+user: Performs everything under deprovision (above) and also deletes the last provisioned user account and associated data.
-version: Displays the version of waagent
-serialconsole: Configures GRUB to mark ttyS0 (the first serial port) as the boot console. This ensures that kernel bootup logs are sent to the serial port and made available for debugging.
-daemon: Run waagent as a daemon to manage interaction with the platform. This argument is specified to waagent in the waagent init script.
-start: Run waagent as a background process
A configuration file (/etc/waagent.conf) controls the actions of waagent. A sample configuration file is shown below:
isioning.Enabled=y
isioning.DeleteRootPassword=n
isioning.RegenerateSshHostKeyPair=y
isioning.SshHostKeyPairType=rsa
isioning.MonitorHostName=y
isioning.DecodeCustomData=n
isioning.ExecuteCustomData=n
isioning.PasswordCryptId=6
isioning.PasswordCryptSaltLength=10
urceDisk.Format=y
urceDisk.Filesystem=ext4
urceDisk.MountPoint=/mnt/resource
urceDisk.MountOptions=None
urceDisk.EnableSwap=n
urceDisk.SwapSizeMB=0
obeResponder=y
.Verbose=n
ootDeviceScsiTimeout=300
pensslPath=None
Proxy.Host=None
Proxy.Port=None
The various configuration options are described in detail below. Configuration options are of three types : Boolean, String or Integer. The Boolean configuration options can be specified as “y” or “n”. The special keyword “None” may be used for some string type configuration entries as detailed below.
This allows the user to enable or disable the provisioning functionality in the agent. Valid values are “y” or “n”. If provisioning is disabled, SSH host and user keys in the image are preserved and any configuration specified in the Azure provisioning API is ignored.
If set, the root password in the /etc/shadow file is erased during the provisioning process.
If set, all SSH host key pairs (ecdsa, dsa and rsa) are deleted during the provisioning process from /etc/ssh/. And a single fresh key pair is generated. The encryption type for the fresh key pair is configurable by the Provisioning.SshHostKeyPairType entry. Please note that some distributions will re-create SSH key pairs for any missing encryption types when the SSH daemon is restarted (for example, upon a reboot).
This can be set to an encryption algorithm type that is supported by the SSH daemon on the VM. The typically supported values are “rsa”, “dsa” and “ecdsa”. Note that “putty.exe” on Windows does not support “ecdsa”. So, if you intend to use putty.exe on Windows to connect to a Linux deployment, please use “rsa” or “dsa”.
If set, waagent will monitor the Linux VM for hostname changes (as returned by the “hostname” command) and automatically update the networking configuration in the image to reflect the change. In order to push the name change to the DNS servers, networking will be restarted in the VM. This will result in brief loss of Internet connectivity.
If set, waagent will decode CustomData from Base64.
If set, waagent will execute CustomData after provisioning.
Algorithm used by crypt when generating password hash.
1 - MD5
2a - Blowfish
5 - SHA-256
6 - SHA-512
Length of random salt used when generating password hash.
If set, the resource disk provided by the platform will be formatted and mounted by waagent if the filesystem type requested by the user in “ResourceDisk.Filesystem” is anything other than “ntfs”. A single partition of type Linux (83) will be made available on the disk. Note that this partition will not be formatted if it can be successfully mounted.
This specifies the filesystem type for the resource disk. Supported values vary by Linux distribution. If the string is X, then mkfs.X should be present on the Linux image. SLES 11 images should typically use 'ext3'. FreeBSD images should use 'ufs2' here.
This specifies the path at which the resource disk is mounted.
Specifies disk mount options to be passed to the mount -o command. This is a comma separated list of values, ex. 'nodev,nosuid'. See mount(8) for details.
If set, a swap file (/swapfile) is created on the resource disk and added to the system swap space.
The size of the swap file in megabytes.
If set, waagent will respond to load balancer probes from the platform (if present).
If set, log verbosity is boosted. Waagent logs to /var/log/waagent.log and leverages the system logrotate functionality to rotate logs.
If set, the agent will attempt to install and then load an RDMA kernel driver that matches the version of the firmware on the underlying hardware.
This configures the SCSI timeout in seconds on the root device. If not set, the system defaults are used.
This can be used to specify an alternate path for the openssl binary to use for cryptographic operations.
If set, the agent will use this proxy server to access the internet.
We do not maintain packaging information in this repo but some samples are shown below as a reference. See the downstream distribution repositories for officially maintained packaging.
The official Ubuntu WALinuxAgent package can be found here: https://launchpad.net/ubuntu/+source/walinuxagent
Run once:
Install required packages:
sudo apt-get -y install ubuntu-dev-tools pbuilder python-all debhelper
Create the pbuilder environment:
sudo pbuilder create --debootstrapopts --variant=buildd
Obtain
To compile the package, from the top-most directory:
Build the source package:
dpkg-buildpackage -S
Build the package:
sudo pbuilder build <waagent.dsc>
Fetch the built package, usually from /var/cache/pbuilder/result
The instructions below describe how to build an rpm package.
Install setuptools
curl https://bootstrap.pypa.io/ez_setup.py -o - | python
The following command will build the binary and source RPMs:
python setup.py bdist_rpm
This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.