Add possibility to reconfigure bridge IP address when there is a new value.
New boolean flag added to net configuration to force IP change if it is need.
Otherwise code behaves as previously and throws error
* bridge: Test the following interface's hardware address for the CNI specific
prefix:
- bridge with IP address
- container veth
* plugins/macvlan test: ensure hardware addr
This will give deterministic MAC addresses for all interfaces CNI
creates and manages the IP for:
* bridge: container veth and host bridge
* macvlan: container veth
* ptp: container veth and host veth
This changes the ip allocation logic to round robin. Before this, host-local IPAM searched for available IPs from start of subnet. Hence it tends to allocate IPs that had been used recently. This is not ideal since it may cause collisions.
When isDefaultGateway is true it automatically sets isGateway to true.
The default route will be added via the (bridge's) gateway IP.
If a default gateway has been configured via IPAM in the same
configuration file, the plugin will error out.
Add a namespace object interface for somewhat cleaner code when
creating and switching between network namespaces. All created
namespaces are now mounted in /var/run/netns to ensure they
have persistent inodes and paths that can be passed around
between plugin components without relying on the current namespace
being correct.
Also remove the thread-locking arguments from the ns package
per https://github.com/appc/cni/issues/183 by doing all the namespace
changes in a separate goroutine that locks/unlocks itself, instead of
the caller having to track OS thread locking.
Resolves CNI part of https://github.com/coreos/rkt/issues/1765
Second part would be adding similar lines into kvm flavored macvlan
support (in time of creating macvtap device).
Not using NewLinkAttrs() or not initializing TxQLen leaves
the value as 0, which tells the kernel to set a zero-length
tx_queue_len. That messes up FIFO traffic shapers (like pfifo)
that use the device TX queue length as the default packet
limit. This leads to a default packet limit of 0, which drops
all packets.
Resolves CNI part of https://github.com/coreos/rkt/issues/1765
Second part would be adding similar lines into kvm flavored macvlan
support (in time of creating macvtap device).
This commit adds a struct type CommonArgs that is to be embedded in
every plugin's argument struct. It contains a field named
"IgnoreUnknown" which will be parsed as a boolean and can be provided to
ignore unknown arguments passed to the plugin.
The 'flannel' meta plugin delegates to other plugins to do the actual
OS-level work. It used the ipam.Exec{Add,Del} procedures for this
delegation, since those do precisely what's needed.
However this is a bit misleading, since the flannel plugin _isn't_
doing this for IPAM, and the ipam.Exec* procedures aren't doing
something specific to IPAM plugins.
So: anticipating that there may be more meta plugins that want to
delegate in the same way, this commit moves generic delegation
procedures to `pkg/invoke`, and makes the `pkg/ipam` procedures (still
used, accurately, in the non-meta plugins) shims.
- Believe we need sudo to create netns
- Use syscall instead of relying on ip netns
- Add sudo to .travis.yml
- Needs more -E
- Revert Godeps GoVersion to 1.4.2
- in travis, test command is run with all necessary env vars
- Loopback plugin only works on 'lo' interface
- Update README, add loopback plugin config
- note script dependency on jq
Signed-off-by: Gabe Rosenhouse <grosenhouse@pivotal.io>
Allow users to tune net network parameters such as somaxconn.
With this patch, users can add a new network configuration:
> {
> "name": "mytuning",
> "type": "tuning",
> "sysctl": {
> "net.core.somaxconn": "500"
> }
> }
The value /proc/sys/net/core/somaxconn will be set to 500 in the network
namespace but will remain unchanged on the host.
Only sysctl parameters that belong to the network subsystem can be
modified.
Related to: https://github.com/coreos/rkt/pull/2140
