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install.sh: Add wget fallback if curl isn't available

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Reportedly, some systems don't have curl but wget. With this patch,
install.sh will use wget instead of curl if the latter is not available
on the target system.

Change-Id: I0bc78feec6d8e1dbf7fbef7c2e10833b79bdbbdc
Signed-off-by: Joakim Roubert <joakimr@axis.com>
This commit is contained in:
Joakim Roubert 2019-08-23 14:39:20 +02:00
parent ffe0288b68
commit db441f28b8
1 changed files with 47 additions and 9 deletions
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56
install.sh
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@ -67,6 +67,7 @@ set -e
# if not specified.
GITHUB_URL=https://github.com/rancher/k3s/releases
DOWNLOADER=
# --- helper functions for logs ---
info()
@ -260,11 +261,14 @@ setup_verify_arch() {
esac
}
# --- fatal if no curl ---
verify_curl() {
if [ -z `which curl || true` ]; then
fatal "Can not find curl for downloading files"
fi
# --- verify existence of network downloader executable ---
verify_downloader() {
# Return failure if it doesn't exist or is no executable
[ -x "$(which $1)" ] || return 1
# Set verified executable as our downloader program and return success
DOWNLOADER=$1
return 0
}
# --- create tempory directory and cleanup when done ---
@ -288,7 +292,17 @@ get_release_version() {
VERSION_K3S="${INSTALL_K3S_VERSION}"
else
info "Finding latest release"
VERSION_K3S=`curl -w "%{url_effective}" -I -L -s -S ${GITHUB_URL}/latest -o /dev/null | sed -e 's|.*/||'`
case $DOWNLOADER in
curl)
VERSION_K3S=$(curl -w '%{url_effective}' -I -L -s -S ${GITHUB_URL}/latest -o /dev/null | sed -e 's|.*/||')
;;
wget)
VERSION_K3S=$(wget -SqO /dev/null ${GITHUB_URL}/latest 2>&1 | grep Location | sed -e 's|.*/||')
;;
*)
fatal "Incorrect downloader executable '$DOWNLOADER'"
;;
esac
fi
info "Using ${VERSION_K3S} as release"
}
@ -297,7 +311,19 @@ get_release_version() {
download_hash() {
HASH_URL=${GITHUB_URL}/download/${VERSION_K3S}/sha256sum-${ARCH}.txt
info "Downloading hash ${HASH_URL}"
curl -o ${TMP_HASH} -sfL ${HASH_URL} || fatal "Hash download failed"
case $DOWNLOADER in
curl)
curl -o ${TMP_HASH} -sfL ${HASH_URL}
;;
wget)
wget -qO ${TMP_HASH} ${HASH_URL}
;;
*)
fatal "Incorrect executable '$DOWNLOADER'"
;;
esac
# Abort if download command failed
[ $? -eq 0 ] || fatal 'Hash download failed'
HASH_EXPECTED=`grep " k3s${SUFFIX}$" ${TMP_HASH} | awk '{print $1}'`
}
@ -316,7 +342,19 @@ installed_hash_matches() {
download_binary() {
BIN_URL=${GITHUB_URL}/download/${VERSION_K3S}/k3s${SUFFIX}
info "Downloading binary ${BIN_URL}"
curl -o ${TMP_BIN} -sfL ${BIN_URL} || fatal "Binary download failed"
case $DOWNLOADER in
curl)
curl -o ${TMP_BIN} -sfL ${BIN_URL}
;;
wget)
wget -qO ${TMP_BIN} ${BIN_URL}
;;
*)
fatal "Incorrect executable '$DOWNLOADER'"
;;
esac
# Abort if download command failed
[ $? -eq 0 ] || fatal 'Binary download failed'
}
# --- verify downloaded binary hash ---
@ -355,7 +393,7 @@ download_and_verify() {
fi
setup_verify_arch
verify_curl
verify_downloader curl || verify_downloader wget || fatal 'Can not find curl or wget for downloading files'
setup_tmp
get_release_version
download_hash