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wget is used by debootstrap to download deb packages for base system.
Sometime it can fail to download one or more packages and we get the error:
E: Couldn't download packages: libffi7
chroot: failed to run command '/debootstrap/debootstrap': No such file or directory
How I did it
Consider "connection refused" a transient error and try again.
Set number of tries to 3 (default is 20)
If 3 is not enough then we probably need to fix deb server or our network connection.
Also it takes too much time if we wait all 20 attempts because:
default connection timeout in Linux: 127 sec
default read/write timeout in wget: 900 sec
Debootstrap fails was very annoying to me. Because it's a final part of build.
These errors were not rare when we download packages for debootstrap from deb.debian.org or another public debian mirrors. trafficmanager.net is more stable but it's not used for arm (see scripts/build_debian_base_system.sh)
wget -t 3 --retry-connrefused passed a test successfully.
Run 200 times debootstrap --download-only --variant=minbase --arch arm64 bullseye $1 http://deb.debian.org/debian
There were 6 retries due to connection timeout. Without fix it would lead to 6 failed builds.
With this fix deb packages were successfully downloaded after 1 retry:
Resolving deb.debian.org (deb.debian.org)... 199.232.138.132, 2a04:4e42:3a::644
Connecting to deb.debian.org (deb.debian.org)|199.232.138.132|:80... failed: Connection timed out.
Connecting to deb.debian.org (deb.debian.org)|2a04:4e42:3a::644|:80... failed: Network is unreachable.
Retrying.
(try: 2) http://deb.debian.org/debian/pool/main/u/util-linux/bsdutils_2.36.1-8+deb11u1_arm64.deb
Connecting to deb.debian.org (deb.debian.org)|199.232.138.132|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 145188 (142K) [application/vnd.debian.binary-package]
Yes, we have 127 sec timeout here between 1st and 2nd try, but it's not critical due to low rate of these errors.
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Why I did it
wget is used by debootstrap to download deb packages for base system.
Sometime it can fail to download one or more packages and we get the error:
E: Couldn't download packages: libffi7
chroot: failed to run command '/debootstrap/debootstrap': No such file or directory
How I did it
If 3 is not enough then we probably need to fix deb server or our network connection.
Also it takes too much time if we wait all 20 attempts because:
default connection timeout in Linux: 127 sec
default read/write timeout in wget: 900 sec
Signed-off-by: Konstantin Vasin k.vasin@yadro.com