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c348cebe99
Allow users to configure firewall policies in a way that persists docker operations/restarts. Docker will not delete or modify any pre-existing rules from the DOCKER-USER filter chain. This allows the user to create in advance any rules required to further restrict access from/to the containers. Fixes docker/docker#29184 Fixes docker/docker#23987 Related to docker/docker#24848 Signed-off-by: Jacob Wen <jian.w.wen@oracle.com>
29 lines
827 B
Go
29 lines
827 B
Go
package libnetwork
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import (
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"github.com/Sirupsen/logrus"
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"github.com/docker/libnetwork/iptables"
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)
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const userChain = "DOCKER-USER"
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// This chain allow users to configure firewall policies in a way that persists
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// docker operations/restarts. Docker will not delete or modify any pre-existing
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// rules from the DOCKER-USER filter chain.
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func arrangeUserFilterRule() {
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_, err := iptables.NewChain(userChain, iptables.Filter, false)
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if err != nil {
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logrus.Warnf("Failed to create %s chain: %v", userChain, err)
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return
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}
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if err = iptables.AddReturnRule(userChain); err != nil {
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logrus.Warnf("Failed to add the RETURN rule for %s: %v", userChain, err)
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return
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}
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err = iptables.EnsureJumpRule("FORWARD", userChain)
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if err != nil {
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logrus.Warnf("Failed to ensure the jump rule for %s: %v", userChain, err)
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}
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}
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