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services: static-networking: Add support for bonding.
* gnu/services/base.scm (<network-link>): Add mac-address field. Set type field to #f by default, so it won't be mandatory. network-link without a type will be used for existing interfaces. (assert-network-link-mac-address, mac-address?): Add sanitizer. Allow valid mac-address or #f. (assert-network-link-type): Add sanitizer. Allow symbol or #f. * gnu/services/base.scm (network-set-up/linux, network-tear-down/linux): Adapt to new structure. * doc/guix.texi (Networking Setup): Document it. * gnu/tests/networking.scm (run-static-networking-advanced-test): New variable. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
This commit is contained in:
Alexey Abramov
Ludovic Courtès
parent
b4f2b681ad
commit
670d985cab
3 changed files with 330 additions and 16 deletions
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@ -20453,20 +20453,75 @@ IP address (a string) through which traffic is routed.
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@deftp {Data Type} network-link
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Data type for a network link (@pxref{Link,,, guile-netlink,
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Guile-Netlink Manual}).
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Guile-Netlink Manual}). During startup, network links are employed to
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construct or modify existing or virtual ethernet links. These ethernet
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links can be identified by their @var{name} or @var{mac-address}. If
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there is a need to create virtual interface, @var{name} and @var{type}
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fields are required.
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@table @code
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@item name
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The name of the link---e.g., @code{"v0p0"}.
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The name of the link---e.g., @code{"v0p0"} (default: @code{#f}).
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@item type
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A symbol denoting the type of the link---e.g., @code{'veth}.
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A symbol denoting the type of the link---e.g., @code{'veth} (default: @code{#f}).
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@item mac-address
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The mac-address of the link---e.g., @code{"98:11:22:33:44:55"} (default: @code{#f}).
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@item arguments
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List of arguments for this type of link.
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@end table
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@end deftp
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Consider a scenario where a server equipped with a network interface
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which has multiple ports. These ports are connected to a switch, which
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supports @uref{https://en.wikipedia.org/wiki/Link_aggregation, link
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aggregation} (also known as bonding or NIC teaming). The switch uses
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port channels to consolidate multiple physical interfaces into one
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logical interface to provide higher bandwidth, load balancing, and link
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redundancy. When a port is added to a LAG (or link aggregation group),
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it inherits the properties of the port-channel. Some of these
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properties are VLAN membership, trunk status, and so on.
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@uref{https://en.wikipedia.org/wiki/Virtual_LAN, VLAN} (or virtual local
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area network) is a logical network that is isolated from other VLANs on
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the same physical network. This can be used to segregate traffic,
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improve security, and simplify network management.
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With all that in mind let's configure our static network for the server.
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We will bond two existing interfaces together using 802.3ad schema and on
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top of it, build a VLAN interface with id 1055. We assign a static ip
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to our new VLAN interface.
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@lisp
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(static-networking
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(links (list (network-link
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(name "bond0")
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(type 'bond)
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(arguments '((mode . "802.3ad")
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(miimon . 100)
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(lacp-active . "on")
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(lacp-rate . "fast"))))
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(network-link
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(mac-address "98:11:22:33:44:55")
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(arguments '((master . "bond0"))))
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(network-link
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(mac-address "98:11:22:33:44:56")
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(arguments '((master . "bond0"))))
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(network-link
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(name "bond0.1055")
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(type 'vlan)
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(arguments '((id . 1055)
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(link . "bond0"))))))
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(addresses (list (network-address
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(value "192.168.1.4/24")
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(device "bond0.1055")))))
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@end lisp
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@cindex loopback device
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@defvar %loopback-static-networking
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This is the @code{static-networking} record representing the ``loopback
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@ -2692,6 +2692,33 @@ (define-compile-time-procedure (assert-valid-address (address string?))
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address)))))))
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address)
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(define (mac-address? str)
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"Return true if STR is a valid MAC address."
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(let ((pattern (make-regexp "^([0-9A-Fa-f]{2}:?){6}$")))
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(false-if-exception (vector? (regexp-exec pattern str)))))
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(define-compile-time-procedure (assert-network-link-mac-address (value identity))
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(cond
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((eq? value #f) value)
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((and (string? value) (mac-address? value)) value)
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(else (raise
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(make-compound-condition
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(formatted-message (G_ "Value (~S) is not a valid mac address.~%")
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value)
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(condition (&error-location
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(location (source-properties->location procedure-call-location)))))))))
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(define-compile-time-procedure (assert-network-link-type (value identity))
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(match value
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(#f value)
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(('quote _) (datum->syntax #'value value))
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(else
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(raise
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(make-compound-condition
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(formatted-message (G_ "Value (~S) is not a symbol.~%") value)
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(condition (&error-location
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(location (source-properties->location procedure-call-location)))))))))
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(define-record-type* <static-networking>
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static-networking make-static-networking
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static-networking?
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@ -2719,8 +2746,14 @@ (define-record-type* <network-address>
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(define-record-type* <network-link>
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network-link make-network-link
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network-link?
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(name network-link-name) ;string--e.g, "v0p0"
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(type network-link-type) ;symbol--e.g.,'veth
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(name network-link-name
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(default #f)) ;string or #f --e.g, "v0p0"
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(type network-link-type
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(sanitize assert-network-link-type)
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(default #f)) ;symbol or #f--e.g.,'veth, 'bond
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(mac-address network-link-mac-address
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(sanitize assert-network-link-mac-address)
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(default #f))
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(arguments network-link-arguments)) ;list
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(define-record-type* <network-route>
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@ -2845,7 +2878,77 @@ (define (network-set-up/linux config)
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(scheme-file "set-up-network"
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(with-extensions (list guile-netlink)
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#~(begin
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(use-modules (ip addr) (ip link) (ip route))
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(use-modules (ip addr) (ip link) (ip route)
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(srfi srfi-1)
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(ice-9 format)
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(ice-9 match))
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(define (match-link-by field-accessor value)
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(fold (lambda (link result)
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(if (equal? (field-accessor link) value)
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link
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result))
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#f
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(get-links)))
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(define (alist->keyword+value alist)
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(fold (match-lambda*
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(((k . v) r)
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(cons* (symbol->keyword k) v r))) '() alist))
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;; FIXME: It is interesting that "modprobe bonding" creates an
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;; interface bond0 straigt away. If we won't have bonding
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;; module, and execute `ip link add name bond0 type bond' we
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;; will get
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;;
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;; RTNETLINK answers: File exists
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;;
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;; This breaks our configuration if we want to
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;; use `bond0' name. Create (force modprobe
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;; bonding) and delete the interface to free up
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;; bond0 name.
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#$(let lp ((links links))
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(cond
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((null? links) #f)
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((and (network-link? (car links))
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;; Type is not mandatory
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(false-if-exception
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(eq? (network-link-type (car links)) 'bond)))
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#~(begin
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(false-if-exception (link-add "bond0" "bond"))
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(link-del "bond0")))
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(else (lp (cdr links)))))
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#$@(map (match-lambda
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(($ <network-link> name type mac-address arguments)
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(cond
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;; Create a new interface
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((and (string? name) (symbol? type))
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#~(begin
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(link-add #$name (symbol->string '#$type) #:type-args '#$arguments)
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;; XXX: If we add routes, addresses must be
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;; already assigned, and interfaces must be
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;; up. It doesn't matter if they won't have
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;; carrier or anything.
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(link-set #$name #:up #t)))
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;; Amend an existing interface
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((and (string? name)
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(eq? type #f))
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#~(let ((link (match-link-by link-name #$name)))
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(if link
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(apply link-set
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(link-id link)
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(alist->keyword+value '#$arguments))
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(format #t (G_ "Interface with name '~a' not found~%") #$name))))
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((string? mac-address)
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#~(let ((link (match-link-by link-addr #$mac-address)))
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(if link
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(apply link-set
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(link-id link)
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(alist->keyword+value '#$arguments))
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(format #t (G_ "Interface with mac-address '~a' not found~%") #$mac-address)))))))
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links)
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#$@(map (lambda (address)
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#~(begin
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@ -2864,11 +2967,7 @@ (define (network-set-up/linux config)
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#:multicast-on #t
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#:up #t)))
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addresses)
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#$@(map (match-lambda
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(($ <network-link> name type arguments)
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#~(link-add #$name #$type
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#:type-args '#$arguments)))
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links)
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#$@(map (lambda (route)
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#~(route-add #$(network-route-destination route)
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#:device
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@ -2912,11 +3011,9 @@ (define-syntax-rule (false-if-netlink-error exp)
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#:src
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#$(network-route-source route))))
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routes)
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#$@(map (match-lambda
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(($ <network-link> name type arguments)
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#~(false-if-netlink-error
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(link-del #$name))))
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links)
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;; Cleanup addresses first, they might be assigned to
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;; created bonds, vlans or bridges.
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#$@(map (lambda (address)
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#~(false-if-netlink-error
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(addr-del #$(network-address-device
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@ -2925,6 +3022,17 @@ (define-syntax-rule (false-if-netlink-error exp)
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#:ipv6?
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#$(network-address-ipv6? address))))
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addresses)
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;; It is now safe to delete some links
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#$@(map (match-lambda
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(($ <network-link> name type mac-address arguments)
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(cond
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;; We delete interfaces that were created
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((and (string? name) (symbol? type))
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#~(false-if-netlink-error
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(link-del #$name)))
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(else #t))))
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links)
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#f)))))
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(define (static-networking-shepherd-service config)
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@ -39,6 +39,7 @@ (define-module (gnu tests networking)
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#:use-module (gnu services shepherd)
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#:use-module (ice-9 match)
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#:export (%test-static-networking
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%test-static-networking-advanced
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%test-inetd
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%test-openvswitch
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%test-dhcpd
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@ -124,6 +125,156 @@ (define %test-static-networking
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(guix combinators)))))
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(run-static-networking-test (virtual-machine os))))))
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(define (run-static-networking-advanced-test vm)
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(define test
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(with-imported-modules '((gnu build marionette)
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(guix build syscalls))
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#~(begin
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(use-modules (gnu build marionette)
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(guix build syscalls)
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(srfi srfi-64))
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(define marionette
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(make-marionette
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'(#$vm "-net" "nic,model=e1000,macaddr=98:11:22:33:44:55"
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"-net" "nic,model=e1000,macaddr=98:11:22:33:44:56")))
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(test-runner-current (system-test-runner #$output))
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(test-begin "static-networking-advanced")
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(test-assert "service is up"
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(marionette-eval
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'(begin
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(use-modules (gnu services herd))
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(start-service 'networking))
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marionette))
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(test-assert "network interfaces"
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(marionette-eval
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'(begin
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(use-modules (guix build syscalls))
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(network-interface-names))
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marionette))
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(test-equal "bond0 bonding mode"
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"802.3ad 4"
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(marionette-eval
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'(begin
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(use-modules (ice-9 rdelim))
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(call-with-input-file "/sys/class/net/bond0/bonding/mode" read-line))
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marionette))
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(test-equal "bond0 bonding lacp_rate"
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"fast 1"
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(marionette-eval
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'(begin
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(use-modules (ice-9 rdelim))
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(call-with-input-file "/sys/class/net/bond0/bonding/lacp_rate" read-line))
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marionette))
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(test-equal "bond0 bonding miimon"
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"100"
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(marionette-eval
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'(begin
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(use-modules (ice-9 rdelim))
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(call-with-input-file "/sys/class/net/bond0/bonding/miimon" read-line))
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marionette))
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(test-equal "bond0 bonding slaves"
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"a b"
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(marionette-eval
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'(begin
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(use-modules (ice-9 rdelim))
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(call-with-input-file "/sys/class/net/bond0/bonding/slaves" read-line))
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marionette))
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;; The hw mac address will come from the first slave bonded to the
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;; channel.
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(test-equal "bond0 mac address"
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"98:11:22:33:44:55"
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(marionette-eval
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'(begin
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(use-modules (ice-9 rdelim))
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(call-with-input-file "/sys/class/net/bond0/address" read-line))
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marionette))
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(test-equal "bond0.1055 is up"
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IFF_UP
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(marionette-eval
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'(let* ((sock (socket AF_INET SOCK_STREAM 0))
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(flags (network-interface-flags sock "bond0.1055")))
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(logand flags IFF_UP))
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marionette))
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(test-equal "bond0.1055 address is correct"
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"192.168.1.4"
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(marionette-eval
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'(let* ((sock (socket AF_INET SOCK_STREAM 0))
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(addr (network-interface-address sock "bond0.1055")))
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(close-port sock)
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(inet-ntop (sockaddr:fam addr) (sockaddr:addr addr)))
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marionette))
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(test-equal "bond0.1055 netmask is correct"
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"255.255.255.0"
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(marionette-eval
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'(let* ((sock (socket AF_INET SOCK_STREAM 0))
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(mask (network-interface-netmask sock "bond0.1055")))
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(close-port sock)
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(inet-ntop (sockaddr:fam mask) (sockaddr:addr mask)))
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marionette))
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(test-end))))
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(gexp->derivation "static-networking-advanced" test))
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(define %test-static-networking-advanced
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(system-test
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(name "static-networking-advanced")
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(description "Test the 'static-networking' service with advanced features like bonds, vlans etc...")
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(value
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(let ((os (marionette-operating-system
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(simple-operating-system
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(service static-networking-service-type
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(list (static-networking
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(links (list
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(network-link
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(mac-address "98:11:22:33:44:55")
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(arguments '((name . "a"))))
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(network-link
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(mac-address "98:11:22:33:44:56")
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(arguments '((name . "b"))))
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(network-link
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(name "bond0")
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(type 'bond)
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(arguments '((mode . "802.3ad")
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(miimon . 100)
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(lacp-active . "on")
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(lacp-rate . "fast"))))
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(network-link
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(name "a")
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(arguments '((master . "bond0"))))
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(network-link
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(name "b")
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(arguments '((master . "bond0"))))
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(network-link
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(name "bond0.1055")
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(type 'vlan)
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(arguments '((id . 1055)
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(link . "bond0"))))))
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(addresses (list (network-address
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(value "192.168.1.4/24")
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(device "bond0.1055"))))))))
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#:imported-modules '((gnu services herd)
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(guix combinators)))))
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(run-static-networking-advanced-test (virtual-machine os))))))
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;;;
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;;; Inetd.
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