How can I build an image myself?

[enumag]

For now I'm simply trying to build a PHP image using this repo on my own.

(The end goal is to compile a --enable-debug version in order to get backtrace for a segfault.)

I'm using this command:

docker build --pull --no-cache 7.4/alpine3.12/cli

However it ends with the following error. What am I doing wrong?

Sending build context to Docker daemon  19.46kB
Step 1/20 : FROM alpine:3.12
3.12: Pulling from library/alpine
Digest: sha256:c0e9560cda118f9ec63ddefb4a173a2b2a0347082d7dff7dc14272e7841a5b5a
Status: Image is up to date for alpine:3.12
 ---> d6e46aa2470d
Step 2/20 : ENV PHPIZE_DEPS 		autoconf 		dpkg-dev dpkg 	file 		g++ 		gcc 		libc-dev 		make 	pkgconf 		re2c
 ---> Running in d0c02037dd0e
Removing intermediate container d0c02037dd0e
 ---> f2c40008ec58
Step 3/20 : RUN apk add --no-cache 		ca-certificates 		curl 		tar 		xz 		openssl
 ---> Running in 8aa1fcbaa8d8
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/community/x86_64/APKINDEX.tar.gz
(1/9) Installing ca-certificates (20191127-r4)
(2/9) Installing nghttp2-libs (1.41.0-r0)
(3/9) Installing libcurl (7.69.1-r2)
(4/9) Installing curl (7.69.1-r2)
(5/9) Installing openssl (1.1.1g-r0)
(6/9) Installing libacl (2.2.53-r0)
(7/9) Installing tar (1.32-r1)
(8/9) Installing xz-libs (5.2.5-r0)
(9/9) Installing xz (5.2.5-r0)
Executing busybox-1.31.1-r19.trigger
Executing ca-certificates-20191127-r4.trigger
OK: 9 MiB in 23 packages
Removing intermediate container 8aa1fcbaa8d8
 ---> 5195fdea5433
Step 4/20 : RUN set -eux; 	addgroup -g 82 -S www-data; 	adduser -u 82 -D -S -G www-data www-data
 ---> Running in 6e0eb5827b0a
+ addgroup -g 82 -S www-data
+ adduser -u 82 -D -S -G www-data www-data
Removing intermediate container 6e0eb5827b0a
 ---> 215c26b844d2
Step 5/20 : ENV PHP_INI_DIR /usr/local/etc/php
 ---> Running in 0fdc50960141
Removing intermediate container 0fdc50960141
 ---> 737c0daa4e2e
Step 6/20 : RUN set -eux; 	mkdir -p "$PHP_INI_DIR/conf.d"; 	[ ! -d /var/www/html ]; 	mkdir -p /var/www/html; 	chown www-data:www-data /var/www/html; 	chmod 777 /var/www/html
 ---> Running in d42f67278b46
+ mkdir -p /usr/local/etc/php/conf.d
+ '[' '!' -d /var/www/html ]
+ mkdir -p /var/www/html
+ chown www-data:www-data /var/www/html
+ chmod 777 /var/www/html
Removing intermediate container d42f67278b46
 ---> 818e2ae87baa
Step 7/20 : ENV PHP_CFLAGS="-fstack-protector-strong -fpic -fpie -O2 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 ---> Running in a93d02e73e5e
Removing intermediate container a93d02e73e5e
 ---> 771a8101e850
Step 8/20 : ENV PHP_CPPFLAGS="$PHP_CFLAGS"
 ---> Running in 8c1757452bb0
Removing intermediate container 8c1757452bb0
 ---> e656f301a1f2
Step 9/20 : ENV PHP_LDFLAGS="-Wl,-O1 -pie"
 ---> Running in 849acc453e92
Removing intermediate container 849acc453e92
 ---> 7178730f3c71
Step 10/20 : ENV GPG_KEYS 42670A7FE4D0441C8E4632349E4FDC074A4EF02D 5A52880781F755608BF815FC910DEB46F53EA312
 ---> Running in f87aea513bd6
Removing intermediate container f87aea513bd6
 ---> a647f90b4d72
Step 11/20 : ENV PHP_VERSION 7.4.13
 ---> Running in e577bd0bcb77
Removing intermediate container e577bd0bcb77
 ---> a528112ac7c1
Step 12/20 : ENV PHP_URL="https://www.php.net/distributions/php-7.4.13.tar.xz" PHP_ASC_URL="https://www.php.net/distributions/php-7.4.13.tar.xz.asc"
 ---> Running in 7b00fa50d1a0
Removing intermediate container 7b00fa50d1a0
 ---> 560238303a93
Step 13/20 : ENV PHP_SHA256="aead303e3abac23106529560547baebbedba0bb2943b91d5aa08fff1f41680f4"
 ---> Running in e47f425fab9b
Removing intermediate container e47f425fab9b
 ---> 202154b14b2e
Step 14/20 : RUN set -eux; 		apk add --no-cache --virtual .fetch-deps gnupg; 		mkdir -p /usr/src; 	cd /usr/src; 		curl -fsSL -o php.tar.xz "$PHP_URL"; 		if [ -n "$PHP_SHA256" ]; then 		echo "$PHP_SHA256 *php.tar.xz" | sha256sum -c -; 	fi; 		if [ -n "$PHP_ASC_URL" ]; then 		curl -fsSL -o php.tar.xz.asc "$PHP_ASC_URL"; 	export GNUPGHOME="$(mktemp -d)"; 		for key in $GPG_KEYS; do 	gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; 		done; 		gpg --batch --verify php.tar.xz.asc php.tar.xz; 		gpgconf --kill all; 		rm -rf "$GNUPGHOME"; 	fi; 		apk del --no-network .fetch-deps
 ---> Running in b0529c61772a
+ apk add --no-cache --virtual .fetch-deps gnupg
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/community/x86_64/APKINDEX.tar.gz
(1/29) Installing libgpg-error (1.37-r0)
(2/29) Installing libassuan (2.5.3-r0)
(3/29) Installing libcap (2.27-r0)
(4/29) Installing libffi (3.3-r2)
(5/29) Installing libintl (0.20.2-r0)
(6/29) Installing libblkid (2.35.2-r0)
(7/29) Installing libmount (2.35.2-r0)
(8/29) Installing pcre (8.44-r0)
(9/29) Installing glib (2.64.6-r0)
(10/29) Installing ncurses-terminfo-base (6.2_p20200523-r0)
(11/29) Installing ncurses-libs (6.2_p20200523-r0)
(12/29) Installing libgcrypt (1.8.5-r0)
(13/29) Installing libsecret (0.20.3-r0)
(14/29) Installing pinentry (1.1.0-r2)
Executing pinentry-1.1.0-r2.post-install
(15/29) Installing libbz2 (1.0.8-r1)
(16/29) Installing gmp (6.2.0-r0)
(17/29) Installing nettle (3.5.1-r1)
(18/29) Installing p11-kit (0.23.20-r5)
(19/29) Installing libtasn1 (4.16.0-r1)
(20/29) Installing libunistring (0.9.10-r0)
(21/29) Installing gnutls (3.6.15-r0)
(22/29) Installing libksba (1.4.0-r0)
(23/29) Installing db (5.3.28-r1)
(24/29) Installing libsasl (2.1.27-r6)
(25/29) Installing libldap (2.4.50-r0)
(26/29) Installing npth (1.6-r0)
(27/29) Installing sqlite-libs (3.32.1-r0)
(28/29) Installing gnupg (2.2.23-r0)
(29/29) Installing .fetch-deps (20201210.082645)
Executing busybox-1.31.1-r19.trigger
OK: 29 MiB in 52 packages
+ mkdir -p /usr/src
+ cd /usr/src
+ curl -fsSL -o php.tar.xz https://www.php.net/distributions/php-7.4.13.tar.xz
+ '[' -n aead303e3abac23106529560547baebbedba0bb2943b91d5aa08fff1f41680f4 ]
+ echo 'aead303e3abac23106529560547baebbedba0bb2943b91d5aa08fff1f41680f4 *php.tar.xz'
+ sha256sum -c -
php.tar.xz: OK
+ '[' -n https://www.php.net/distributions/php-7.4.13.tar.xz.asc ]
+ curl -fsSL -o php.tar.xz.asc https://www.php.net/distributions/php-7.4.13.tar.xz.asc
+ mktemp -d
+ export 'GNUPGHOME=/tmp/tmp.GlLbeI'
+ gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys 42670A7FE4D0441C8E4632349E4FDC074A4EF02D
gpg: keybox '/tmp/tmp.GlLbeI/pubring.kbx' created
gpg: keyserver receive failed: Address not available
The command '/bin/sh -c set -eux; 		apk add --no-cache --virtual .fetch-deps gnupg; 		mkdir -p /usr/src; 	cd /usr/src; 		curl -fsSL -o php.tar.xz "$PHP_URL"; 		if [ -n "$PHP_SHA256" ]; then 		echo "$PHP_SHA256 *php.tar.xz" | sha256sum -c -; 	fi; 		if [ -n "$PHP_ASC_URL" ]; then 		curl -fsSL -o php.tar.xz.asc "$PHP_ASC_URL"; 		export GNUPGHOME="$(mktemp -d)"; 		for key in $GPG_KEYS; do 			gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; 		done; 		gpg --batch --verify php.tar.xz.asc php.tar.xz; 		gpgconf --kill all; 		rm -rf "$GNUPGHOME"; 	fi; 		apk del --no-network .fetch-deps' returned a non-zero code: 2

[wglambert]

docker-library/official-images#4252 (comment)

TLDR; GPG servers are extremely flaky . . .

This is what we do for GPG issues docker-library/official-images#4252 (comment)

[enumag]

@wglambert Errr... okay? So how do I fix it locally?

[wglambert]

You can keep running the build and it will eventually succeed since ha.pool.sks-keyservers.net is a round-robin pool
docker-library/httpd#66 (comment)

Or you could add more servers to try #586 (comment)

docker-library/tomcat#87 (comment)

My own preferred ordering would be the following:

• ha.pool.sks-keyservers.net
• pgp.mit.edu
• hkp://p80.pool.sks-keyservers.net:80
• hkp://keyserver.ubuntu.com:80
• keyserver.pgp.com

[enumag]

Thanks. It compiled now.